Lattice distortion in a strong and ductile refractory high-entropy alloy
The maximization of the mixing entropy with the optimal range of enthalpy in high-entropy alloys (HEAs) can promote the formation of a stable single solid-solution phase with the absence of competing intermetallic compounds. The resultant effects, such as lattice distortion, can contribute to excell...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Lee, Chanho [verfasserIn] Song, Gian [verfasserIn] Gao, Michael C. [verfasserIn] Feng, Rui [verfasserIn] Chen, Peiyong [verfasserIn] Brechtl, Jamieson [verfasserIn] Chen, Yan [verfasserIn] An, Ke [verfasserIn] Guo, Wei [verfasserIn] Poplawsky, Jonathan D. [verfasserIn] Li, Song [verfasserIn] Samaei, A.T. [verfasserIn] Chen, Wei [verfasserIn] Hu, Alice [verfasserIn] Choo, Hahn [verfasserIn] Liaw, Peter K. [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2018 |
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| Schlagwörter: |
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| Übergeordnetes Werk: |
Enthalten in: Acta materialia - Amsterdam [u.a.] : Elsevier Science, 1996, 160, Seite 158-172 |
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| Übergeordnetes Werk: |
volume:160 ; pages:158-172 |
| DOI / URN: |
10.1016/j.actamat.2018.08.053 |
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| 245 | 1 | 0 | |a Lattice distortion in a strong and ductile refractory high-entropy alloy |
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| 520 | |a The maximization of the mixing entropy with the optimal range of enthalpy in high-entropy alloys (HEAs) can promote the formation of a stable single solid-solution phase with the absence of competing intermetallic compounds. The resultant effects, such as lattice distortion, can contribute to excellent mechanical properties, which has motivated numerous efforts to develop and design single-phase HEAs. However, challenges still remain, particularly on quantifying the lattice distortion and relating it to materials properties. In this study, we have developed a NbTaTiV refractory HEA with a single body-centered-cubic (BCC) structure using an integrated experimental and theoretical approach. The theoretical efforts include thermodynamic modeling, i.e., CALculation of PHAse Diagram (CALPHAD). The microstructural evolutions have been investigated by systematic heat-treatment processes. The typical dendrite microstructure was observed, which is caused by the elemental segregation during the solidification in the as-cast condition. The structural inhomogeneity and chemical segregation were completely eliminated by the proper homogenization treatment at 1200 °C for 3 days. The homogeneous elemental distribution was quantitatively verified by the Atom Probe Tomography (APT) technique. Importantly, results indicate that this HEA exhibits the high yield strength and ductility at both room and high temperatures (up to 900 °C). Furthermore, the effects of the high mixing entropy on the mechanical properties are discussed and quantified in terms of lattice distortions and interatomic interactions of the NbTaTiV HEA via first-principles calculations. It is found that the local severe lattice distortions are induced, due to the atomic interactions and atomic-size mismatch in the homogenization-treated NbTaTiV refractory HEA. | ||
| 650 | 4 | |a Lattice distortion | |
| 650 | 4 | |a High-entropy alloy | |
| 650 | 4 | |a First-principles calculation | |
| 650 | 4 | |a In-situ neutron diffraction | |
| 700 | 1 | |a Song, Gian |e verfasserin |4 aut | |
| 700 | 1 | |a Gao, Michael C. |e verfasserin |0 (orcid)0000-0002-0515-846X |4 aut | |
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| 700 | 1 | |a Chen, Peiyong |e verfasserin |4 aut | |
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| 700 | 1 | |a Poplawsky, Jonathan D. |e verfasserin |4 aut | |
| 700 | 1 | |a Li, Song |e verfasserin |4 aut | |
| 700 | 1 | |a Samaei, A.T. |e verfasserin |4 aut | |
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10.1016/j.actamat.2018.08.053 doi (DE-627)ELV000703354 (ELSEVIER)S1359-6454(18)30690-6 DE-627 ger DE-627 rda eng 670 DE-600 51.00 bkl Lee, Chanho verfasserin aut Lattice distortion in a strong and ductile refractory high-entropy alloy 2018 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The maximization of the mixing entropy with the optimal range of enthalpy in high-entropy alloys (HEAs) can promote the formation of a stable single solid-solution phase with the absence of competing intermetallic compounds. The resultant effects, such as lattice distortion, can contribute to excellent mechanical properties, which has motivated numerous efforts to develop and design single-phase HEAs. However, challenges still remain, particularly on quantifying the lattice distortion and relating it to materials properties. In this study, we have developed a NbTaTiV refractory HEA with a single body-centered-cubic (BCC) structure using an integrated experimental and theoretical approach. The theoretical efforts include thermodynamic modeling, i.e., CALculation of PHAse Diagram (CALPHAD). The microstructural evolutions have been investigated by systematic heat-treatment processes. The typical dendrite microstructure was observed, which is caused by the elemental segregation during the solidification in the as-cast condition. The structural inhomogeneity and chemical segregation were completely eliminated by the proper homogenization treatment at 1200 °C for 3 days. The homogeneous elemental distribution was quantitatively verified by the Atom Probe Tomography (APT) technique. Importantly, results indicate that this HEA exhibits the high yield strength and ductility at both room and high temperatures (up to 900 °C). Furthermore, the effects of the high mixing entropy on the mechanical properties are discussed and quantified in terms of lattice distortions and interatomic interactions of the NbTaTiV HEA via first-principles calculations. It is found that the local severe lattice distortions are induced, due to the atomic interactions and atomic-size mismatch in the homogenization-treated NbTaTiV refractory HEA. Lattice distortion High-entropy alloy First-principles calculation In-situ neutron diffraction Song, Gian verfasserin aut Gao, Michael C. verfasserin (orcid)0000-0002-0515-846X aut Feng, Rui verfasserin (orcid)0000-0001-5867-1761 aut Chen, Peiyong verfasserin aut Brechtl, Jamieson verfasserin (orcid)0000-0002-1739-4283 aut Chen, Yan verfasserin (orcid)0000-0001-6095-1754 aut An, Ke verfasserin (orcid)0000-0002-6093-429X aut Guo, Wei verfasserin aut Poplawsky, Jonathan D. verfasserin aut Li, Song verfasserin aut Samaei, A.T. verfasserin aut Chen, Wei verfasserin (orcid)0000-0002-1135-7721 aut Hu, Alice verfasserin (orcid)0000-0002-0883-315X aut Choo, Hahn verfasserin aut Liaw, Peter K. verfasserin (orcid)0000-0002-3054-5955 aut Enthalten in Acta materialia Amsterdam [u.a.] : Elsevier Science, 1996 160, Seite 158-172 Online-Ressource (DE-627)320521338 (DE-600)2014621-8 (DE-576)094449422 1359-6454 nnns volume:160 pages:158-172 GBV_USEFLAG_U SYSFLAG_U GBV_ELV GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_266 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2008 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 51.00 Werkstoffkunde: Allgemeines AR 160 158-172 |
| spelling |
10.1016/j.actamat.2018.08.053 doi (DE-627)ELV000703354 (ELSEVIER)S1359-6454(18)30690-6 DE-627 ger DE-627 rda eng 670 DE-600 51.00 bkl Lee, Chanho verfasserin aut Lattice distortion in a strong and ductile refractory high-entropy alloy 2018 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The maximization of the mixing entropy with the optimal range of enthalpy in high-entropy alloys (HEAs) can promote the formation of a stable single solid-solution phase with the absence of competing intermetallic compounds. The resultant effects, such as lattice distortion, can contribute to excellent mechanical properties, which has motivated numerous efforts to develop and design single-phase HEAs. However, challenges still remain, particularly on quantifying the lattice distortion and relating it to materials properties. In this study, we have developed a NbTaTiV refractory HEA with a single body-centered-cubic (BCC) structure using an integrated experimental and theoretical approach. The theoretical efforts include thermodynamic modeling, i.e., CALculation of PHAse Diagram (CALPHAD). The microstructural evolutions have been investigated by systematic heat-treatment processes. The typical dendrite microstructure was observed, which is caused by the elemental segregation during the solidification in the as-cast condition. The structural inhomogeneity and chemical segregation were completely eliminated by the proper homogenization treatment at 1200 °C for 3 days. The homogeneous elemental distribution was quantitatively verified by the Atom Probe Tomography (APT) technique. Importantly, results indicate that this HEA exhibits the high yield strength and ductility at both room and high temperatures (up to 900 °C). Furthermore, the effects of the high mixing entropy on the mechanical properties are discussed and quantified in terms of lattice distortions and interatomic interactions of the NbTaTiV HEA via first-principles calculations. It is found that the local severe lattice distortions are induced, due to the atomic interactions and atomic-size mismatch in the homogenization-treated NbTaTiV refractory HEA. Lattice distortion High-entropy alloy First-principles calculation In-situ neutron diffraction Song, Gian verfasserin aut Gao, Michael C. verfasserin (orcid)0000-0002-0515-846X aut Feng, Rui verfasserin (orcid)0000-0001-5867-1761 aut Chen, Peiyong verfasserin aut Brechtl, Jamieson verfasserin (orcid)0000-0002-1739-4283 aut Chen, Yan verfasserin (orcid)0000-0001-6095-1754 aut An, Ke verfasserin (orcid)0000-0002-6093-429X aut Guo, Wei verfasserin aut Poplawsky, Jonathan D. verfasserin aut Li, Song verfasserin aut Samaei, A.T. verfasserin aut Chen, Wei verfasserin (orcid)0000-0002-1135-7721 aut Hu, Alice verfasserin (orcid)0000-0002-0883-315X aut Choo, Hahn verfasserin aut Liaw, Peter K. verfasserin (orcid)0000-0002-3054-5955 aut Enthalten in Acta materialia Amsterdam [u.a.] : Elsevier Science, 1996 160, Seite 158-172 Online-Ressource (DE-627)320521338 (DE-600)2014621-8 (DE-576)094449422 1359-6454 nnns volume:160 pages:158-172 GBV_USEFLAG_U SYSFLAG_U GBV_ELV GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_266 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2008 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 51.00 Werkstoffkunde: Allgemeines AR 160 158-172 |
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10.1016/j.actamat.2018.08.053 doi (DE-627)ELV000703354 (ELSEVIER)S1359-6454(18)30690-6 DE-627 ger DE-627 rda eng 670 DE-600 51.00 bkl Lee, Chanho verfasserin aut Lattice distortion in a strong and ductile refractory high-entropy alloy 2018 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The maximization of the mixing entropy with the optimal range of enthalpy in high-entropy alloys (HEAs) can promote the formation of a stable single solid-solution phase with the absence of competing intermetallic compounds. The resultant effects, such as lattice distortion, can contribute to excellent mechanical properties, which has motivated numerous efforts to develop and design single-phase HEAs. However, challenges still remain, particularly on quantifying the lattice distortion and relating it to materials properties. In this study, we have developed a NbTaTiV refractory HEA with a single body-centered-cubic (BCC) structure using an integrated experimental and theoretical approach. The theoretical efforts include thermodynamic modeling, i.e., CALculation of PHAse Diagram (CALPHAD). The microstructural evolutions have been investigated by systematic heat-treatment processes. The typical dendrite microstructure was observed, which is caused by the elemental segregation during the solidification in the as-cast condition. The structural inhomogeneity and chemical segregation were completely eliminated by the proper homogenization treatment at 1200 °C for 3 days. The homogeneous elemental distribution was quantitatively verified by the Atom Probe Tomography (APT) technique. Importantly, results indicate that this HEA exhibits the high yield strength and ductility at both room and high temperatures (up to 900 °C). Furthermore, the effects of the high mixing entropy on the mechanical properties are discussed and quantified in terms of lattice distortions and interatomic interactions of the NbTaTiV HEA via first-principles calculations. It is found that the local severe lattice distortions are induced, due to the atomic interactions and atomic-size mismatch in the homogenization-treated NbTaTiV refractory HEA. Lattice distortion High-entropy alloy First-principles calculation In-situ neutron diffraction Song, Gian verfasserin aut Gao, Michael C. verfasserin (orcid)0000-0002-0515-846X aut Feng, Rui verfasserin (orcid)0000-0001-5867-1761 aut Chen, Peiyong verfasserin aut Brechtl, Jamieson verfasserin (orcid)0000-0002-1739-4283 aut Chen, Yan verfasserin (orcid)0000-0001-6095-1754 aut An, Ke verfasserin (orcid)0000-0002-6093-429X aut Guo, Wei verfasserin aut Poplawsky, Jonathan D. verfasserin aut Li, Song verfasserin aut Samaei, A.T. verfasserin aut Chen, Wei verfasserin (orcid)0000-0002-1135-7721 aut Hu, Alice verfasserin (orcid)0000-0002-0883-315X aut Choo, Hahn verfasserin aut Liaw, Peter K. verfasserin (orcid)0000-0002-3054-5955 aut Enthalten in Acta materialia Amsterdam [u.a.] : Elsevier Science, 1996 160, Seite 158-172 Online-Ressource (DE-627)320521338 (DE-600)2014621-8 (DE-576)094449422 1359-6454 nnns volume:160 pages:158-172 GBV_USEFLAG_U SYSFLAG_U GBV_ELV GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_266 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2008 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 51.00 Werkstoffkunde: Allgemeines AR 160 158-172 |
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10.1016/j.actamat.2018.08.053 doi (DE-627)ELV000703354 (ELSEVIER)S1359-6454(18)30690-6 DE-627 ger DE-627 rda eng 670 DE-600 51.00 bkl Lee, Chanho verfasserin aut Lattice distortion in a strong and ductile refractory high-entropy alloy 2018 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The maximization of the mixing entropy with the optimal range of enthalpy in high-entropy alloys (HEAs) can promote the formation of a stable single solid-solution phase with the absence of competing intermetallic compounds. The resultant effects, such as lattice distortion, can contribute to excellent mechanical properties, which has motivated numerous efforts to develop and design single-phase HEAs. However, challenges still remain, particularly on quantifying the lattice distortion and relating it to materials properties. In this study, we have developed a NbTaTiV refractory HEA with a single body-centered-cubic (BCC) structure using an integrated experimental and theoretical approach. The theoretical efforts include thermodynamic modeling, i.e., CALculation of PHAse Diagram (CALPHAD). The microstructural evolutions have been investigated by systematic heat-treatment processes. The typical dendrite microstructure was observed, which is caused by the elemental segregation during the solidification in the as-cast condition. The structural inhomogeneity and chemical segregation were completely eliminated by the proper homogenization treatment at 1200 °C for 3 days. The homogeneous elemental distribution was quantitatively verified by the Atom Probe Tomography (APT) technique. Importantly, results indicate that this HEA exhibits the high yield strength and ductility at both room and high temperatures (up to 900 °C). Furthermore, the effects of the high mixing entropy on the mechanical properties are discussed and quantified in terms of lattice distortions and interatomic interactions of the NbTaTiV HEA via first-principles calculations. It is found that the local severe lattice distortions are induced, due to the atomic interactions and atomic-size mismatch in the homogenization-treated NbTaTiV refractory HEA. Lattice distortion High-entropy alloy First-principles calculation In-situ neutron diffraction Song, Gian verfasserin aut Gao, Michael C. verfasserin (orcid)0000-0002-0515-846X aut Feng, Rui verfasserin (orcid)0000-0001-5867-1761 aut Chen, Peiyong verfasserin aut Brechtl, Jamieson verfasserin (orcid)0000-0002-1739-4283 aut Chen, Yan verfasserin (orcid)0000-0001-6095-1754 aut An, Ke verfasserin (orcid)0000-0002-6093-429X aut Guo, Wei verfasserin aut Poplawsky, Jonathan D. verfasserin aut Li, Song verfasserin aut Samaei, A.T. verfasserin aut Chen, Wei verfasserin (orcid)0000-0002-1135-7721 aut Hu, Alice verfasserin (orcid)0000-0002-0883-315X aut Choo, Hahn verfasserin aut Liaw, Peter K. verfasserin (orcid)0000-0002-3054-5955 aut Enthalten in Acta materialia Amsterdam [u.a.] : Elsevier Science, 1996 160, Seite 158-172 Online-Ressource (DE-627)320521338 (DE-600)2014621-8 (DE-576)094449422 1359-6454 nnns volume:160 pages:158-172 GBV_USEFLAG_U SYSFLAG_U GBV_ELV GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_266 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2008 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 51.00 Werkstoffkunde: Allgemeines AR 160 158-172 |
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10.1016/j.actamat.2018.08.053 doi (DE-627)ELV000703354 (ELSEVIER)S1359-6454(18)30690-6 DE-627 ger DE-627 rda eng 670 DE-600 51.00 bkl Lee, Chanho verfasserin aut Lattice distortion in a strong and ductile refractory high-entropy alloy 2018 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The maximization of the mixing entropy with the optimal range of enthalpy in high-entropy alloys (HEAs) can promote the formation of a stable single solid-solution phase with the absence of competing intermetallic compounds. The resultant effects, such as lattice distortion, can contribute to excellent mechanical properties, which has motivated numerous efforts to develop and design single-phase HEAs. However, challenges still remain, particularly on quantifying the lattice distortion and relating it to materials properties. In this study, we have developed a NbTaTiV refractory HEA with a single body-centered-cubic (BCC) structure using an integrated experimental and theoretical approach. The theoretical efforts include thermodynamic modeling, i.e., CALculation of PHAse Diagram (CALPHAD). The microstructural evolutions have been investigated by systematic heat-treatment processes. The typical dendrite microstructure was observed, which is caused by the elemental segregation during the solidification in the as-cast condition. The structural inhomogeneity and chemical segregation were completely eliminated by the proper homogenization treatment at 1200 °C for 3 days. The homogeneous elemental distribution was quantitatively verified by the Atom Probe Tomography (APT) technique. Importantly, results indicate that this HEA exhibits the high yield strength and ductility at both room and high temperatures (up to 900 °C). Furthermore, the effects of the high mixing entropy on the mechanical properties are discussed and quantified in terms of lattice distortions and interatomic interactions of the NbTaTiV HEA via first-principles calculations. It is found that the local severe lattice distortions are induced, due to the atomic interactions and atomic-size mismatch in the homogenization-treated NbTaTiV refractory HEA. Lattice distortion High-entropy alloy First-principles calculation In-situ neutron diffraction Song, Gian verfasserin aut Gao, Michael C. verfasserin (orcid)0000-0002-0515-846X aut Feng, Rui verfasserin (orcid)0000-0001-5867-1761 aut Chen, Peiyong verfasserin aut Brechtl, Jamieson verfasserin (orcid)0000-0002-1739-4283 aut Chen, Yan verfasserin (orcid)0000-0001-6095-1754 aut An, Ke verfasserin (orcid)0000-0002-6093-429X aut Guo, Wei verfasserin aut Poplawsky, Jonathan D. verfasserin aut Li, Song verfasserin aut Samaei, A.T. verfasserin aut Chen, Wei verfasserin (orcid)0000-0002-1135-7721 aut Hu, Alice verfasserin (orcid)0000-0002-0883-315X aut Choo, Hahn verfasserin aut Liaw, Peter K. verfasserin (orcid)0000-0002-3054-5955 aut Enthalten in Acta materialia Amsterdam [u.a.] : Elsevier Science, 1996 160, Seite 158-172 Online-Ressource (DE-627)320521338 (DE-600)2014621-8 (DE-576)094449422 1359-6454 nnns volume:160 pages:158-172 GBV_USEFLAG_U SYSFLAG_U GBV_ELV GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_266 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2008 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2088 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 51.00 Werkstoffkunde: Allgemeines AR 160 158-172 |
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Lee, Chanho @@aut@@ Song, Gian @@aut@@ Gao, Michael C. @@aut@@ Feng, Rui @@aut@@ Chen, Peiyong @@aut@@ Brechtl, Jamieson @@aut@@ Chen, Yan @@aut@@ An, Ke @@aut@@ Guo, Wei @@aut@@ Poplawsky, Jonathan D. @@aut@@ Li, Song @@aut@@ Samaei, A.T. @@aut@@ Chen, Wei @@aut@@ Hu, Alice @@aut@@ Choo, Hahn @@aut@@ Liaw, Peter K. @@aut@@ |
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Lee, Chanho |
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Lee, Chanho ddc 670 bkl 51.00 misc Lattice distortion misc High-entropy alloy misc First-principles calculation misc In-situ neutron diffraction Lattice distortion in a strong and ductile refractory high-entropy alloy |
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670 DE-600 51.00 bkl Lattice distortion in a strong and ductile refractory high-entropy alloy Lattice distortion High-entropy alloy First-principles calculation In-situ neutron diffraction |
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Lattice distortion in a strong and ductile refractory high-entropy alloy |
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Lee, Chanho Song, Gian Gao, Michael C. Feng, Rui Chen, Peiyong Brechtl, Jamieson Chen, Yan An, Ke Guo, Wei Poplawsky, Jonathan D. Li, Song Samaei, A.T. Chen, Wei Hu, Alice Choo, Hahn Liaw, Peter K. |
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lattice distortion in a strong and ductile refractory high-entropy alloy |
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Lattice distortion in a strong and ductile refractory high-entropy alloy |
| abstract |
The maximization of the mixing entropy with the optimal range of enthalpy in high-entropy alloys (HEAs) can promote the formation of a stable single solid-solution phase with the absence of competing intermetallic compounds. The resultant effects, such as lattice distortion, can contribute to excellent mechanical properties, which has motivated numerous efforts to develop and design single-phase HEAs. However, challenges still remain, particularly on quantifying the lattice distortion and relating it to materials properties. In this study, we have developed a NbTaTiV refractory HEA with a single body-centered-cubic (BCC) structure using an integrated experimental and theoretical approach. The theoretical efforts include thermodynamic modeling, i.e., CALculation of PHAse Diagram (CALPHAD). The microstructural evolutions have been investigated by systematic heat-treatment processes. The typical dendrite microstructure was observed, which is caused by the elemental segregation during the solidification in the as-cast condition. The structural inhomogeneity and chemical segregation were completely eliminated by the proper homogenization treatment at 1200 °C for 3 days. The homogeneous elemental distribution was quantitatively verified by the Atom Probe Tomography (APT) technique. Importantly, results indicate that this HEA exhibits the high yield strength and ductility at both room and high temperatures (up to 900 °C). Furthermore, the effects of the high mixing entropy on the mechanical properties are discussed and quantified in terms of lattice distortions and interatomic interactions of the NbTaTiV HEA via first-principles calculations. It is found that the local severe lattice distortions are induced, due to the atomic interactions and atomic-size mismatch in the homogenization-treated NbTaTiV refractory HEA. |
| abstractGer |
The maximization of the mixing entropy with the optimal range of enthalpy in high-entropy alloys (HEAs) can promote the formation of a stable single solid-solution phase with the absence of competing intermetallic compounds. The resultant effects, such as lattice distortion, can contribute to excellent mechanical properties, which has motivated numerous efforts to develop and design single-phase HEAs. However, challenges still remain, particularly on quantifying the lattice distortion and relating it to materials properties. In this study, we have developed a NbTaTiV refractory HEA with a single body-centered-cubic (BCC) structure using an integrated experimental and theoretical approach. The theoretical efforts include thermodynamic modeling, i.e., CALculation of PHAse Diagram (CALPHAD). The microstructural evolutions have been investigated by systematic heat-treatment processes. The typical dendrite microstructure was observed, which is caused by the elemental segregation during the solidification in the as-cast condition. The structural inhomogeneity and chemical segregation were completely eliminated by the proper homogenization treatment at 1200 °C for 3 days. The homogeneous elemental distribution was quantitatively verified by the Atom Probe Tomography (APT) technique. Importantly, results indicate that this HEA exhibits the high yield strength and ductility at both room and high temperatures (up to 900 °C). Furthermore, the effects of the high mixing entropy on the mechanical properties are discussed and quantified in terms of lattice distortions and interatomic interactions of the NbTaTiV HEA via first-principles calculations. It is found that the local severe lattice distortions are induced, due to the atomic interactions and atomic-size mismatch in the homogenization-treated NbTaTiV refractory HEA. |
| abstract_unstemmed |
The maximization of the mixing entropy with the optimal range of enthalpy in high-entropy alloys (HEAs) can promote the formation of a stable single solid-solution phase with the absence of competing intermetallic compounds. The resultant effects, such as lattice distortion, can contribute to excellent mechanical properties, which has motivated numerous efforts to develop and design single-phase HEAs. However, challenges still remain, particularly on quantifying the lattice distortion and relating it to materials properties. In this study, we have developed a NbTaTiV refractory HEA with a single body-centered-cubic (BCC) structure using an integrated experimental and theoretical approach. The theoretical efforts include thermodynamic modeling, i.e., CALculation of PHAse Diagram (CALPHAD). The microstructural evolutions have been investigated by systematic heat-treatment processes. The typical dendrite microstructure was observed, which is caused by the elemental segregation during the solidification in the as-cast condition. The structural inhomogeneity and chemical segregation were completely eliminated by the proper homogenization treatment at 1200 °C for 3 days. The homogeneous elemental distribution was quantitatively verified by the Atom Probe Tomography (APT) technique. Importantly, results indicate that this HEA exhibits the high yield strength and ductility at both room and high temperatures (up to 900 °C). Furthermore, the effects of the high mixing entropy on the mechanical properties are discussed and quantified in terms of lattice distortions and interatomic interactions of the NbTaTiV HEA via first-principles calculations. It is found that the local severe lattice distortions are induced, due to the atomic interactions and atomic-size mismatch in the homogenization-treated NbTaTiV refractory HEA. |
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Lattice distortion in a strong and ductile refractory high-entropy alloy |
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Song, Gian Gao, Michael C. Feng, Rui Chen, Peiyong Brechtl, Jamieson Chen, Yan An, Ke Guo, Wei Poplawsky, Jonathan D. Li, Song Samaei, A.T. Chen, Wei Hu, Alice Choo, Hahn Liaw, Peter K. |
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10.1016/j.actamat.2018.08.053 |
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