High temperature softening mechanism of powder metallurgy TA15 alloy
The understanding of softening mechanisms for high-temperature titanium alloys at service temperature is essential to guarantee their service stability and safety. High-temperature softening is mainly manifested as grain boundary softening for metallic materials. To clarify the softening mechanism a...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Li, Shaolong [verfasserIn] Li, Shufeng [verfasserIn] Liu, Lei [verfasserIn] Gao, Lina [verfasserIn] Fu, Yabo [verfasserIn] Zhang, Xin [verfasserIn] Li, Bo [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2023 |
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| Schlagwörter: |
High-temperature tensile property |
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| Übergeordnetes Werk: |
Enthalten in: Materials science and engineering / A - Amsterdam : Elsevier, 1988, 877 |
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| Übergeordnetes Werk: |
volume:877 |
| DOI / URN: |
10.1016/j.msea.2023.145160 |
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ELV010249575 |
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| 520 | |a The understanding of softening mechanisms for high-temperature titanium alloys at service temperature is essential to guarantee their service stability and safety. High-temperature softening is mainly manifested as grain boundary softening for metallic materials. To clarify the softening mechanism and failure mode of high-temperature titanium alloy TA15 (Ti-6.5Al–2Zr–1Mo–1V, wt.%) at temperature around service temperatures, coarse prior β grains were obtained by spark plasma sintering at 1300 °C, other than 1000 °C which is the traditional power metallurgy (P/M) consolidation temperature for TA15. Meanwhile, the effect of grain boundary softening was amplified. The high-temperature tensile test was carried out at 500–650 °C at intervals of 50 °C. The experimental results showed the maximum prior β grain size of P/M TA15 alloy is 2.9 μm, and its tensile strength decreases from 579 to 389 MPa with the increase of tensile temperature from 500 °C to 650 °C. Combined with calculation according to the Read-Shockley formula and analysis by macro-fracture, which show that the grain boundary strength is higher than the grain strength at 500 and 550 °C, and there are obvious grain and phase boundary torsion. The fracture mode demonstrated as a trans-granular fracture. The specimens soften rapidly, grain boundary strength decreases to less than grain strength, which led to fracture mode changed to inter-granular fracture at tensile temperatures up to 600 °C. If the crack extends to the critical length, the stress at the crack tip reaches easily the fracture strength of P/M TA15 alloy, and crack propagates rapidly at the temperature above 600 °C. Moreover, which corresponds to the elongation of true stress-strain decreasing with the increase of test temperature. OM and EBSD result demonstrated that the equi-cohesive temperature of TA15 alloy between 550 °C and 600 °C. Our findings provide a promising route to improve service temperature of high temperature TA15 alloy by raising the equi-cohesive temperature area in zone Ⅱ to a higher temperature. | ||
| 650 | 4 | |a TA15 alloy | |
| 650 | 4 | |a High-temperature tensile property | |
| 650 | 4 | |a High-temperature softening mechanism | |
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10.1016/j.msea.2023.145160 doi (DE-627)ELV010249575 (ELSEVIER)S0921-5093(23)00584-1 DE-627 ger DE-627 rda eng 600 670 530 VZ 51.00 bkl Li, Shaolong verfasserin aut High temperature softening mechanism of powder metallurgy TA15 alloy 2023 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The understanding of softening mechanisms for high-temperature titanium alloys at service temperature is essential to guarantee their service stability and safety. High-temperature softening is mainly manifested as grain boundary softening for metallic materials. To clarify the softening mechanism and failure mode of high-temperature titanium alloy TA15 (Ti-6.5Al–2Zr–1Mo–1V, wt.%) at temperature around service temperatures, coarse prior β grains were obtained by spark plasma sintering at 1300 °C, other than 1000 °C which is the traditional power metallurgy (P/M) consolidation temperature for TA15. Meanwhile, the effect of grain boundary softening was amplified. The high-temperature tensile test was carried out at 500–650 °C at intervals of 50 °C. The experimental results showed the maximum prior β grain size of P/M TA15 alloy is 2.9 μm, and its tensile strength decreases from 579 to 389 MPa with the increase of tensile temperature from 500 °C to 650 °C. Combined with calculation according to the Read-Shockley formula and analysis by macro-fracture, which show that the grain boundary strength is higher than the grain strength at 500 and 550 °C, and there are obvious grain and phase boundary torsion. The fracture mode demonstrated as a trans-granular fracture. The specimens soften rapidly, grain boundary strength decreases to less than grain strength, which led to fracture mode changed to inter-granular fracture at tensile temperatures up to 600 °C. If the crack extends to the critical length, the stress at the crack tip reaches easily the fracture strength of P/M TA15 alloy, and crack propagates rapidly at the temperature above 600 °C. Moreover, which corresponds to the elongation of true stress-strain decreasing with the increase of test temperature. OM and EBSD result demonstrated that the equi-cohesive temperature of TA15 alloy between 550 °C and 600 °C. Our findings provide a promising route to improve service temperature of high temperature TA15 alloy by raising the equi-cohesive temperature area in zone Ⅱ to a higher temperature. TA15 alloy High-temperature tensile property High-temperature softening mechanism Equi-cohesive temperature Li, Shufeng verfasserin (orcid)0000-0003-4348-8491 aut Liu, Lei verfasserin aut Gao, Lina verfasserin aut Fu, Yabo verfasserin aut Zhang, Xin verfasserin (orcid)0000-0001-7224-2090 aut Li, Bo verfasserin aut Enthalten in Materials science and engineering / A Amsterdam : Elsevier, 1988 877 Online-Ressource (DE-627)320500497 (DE-600)2012154-4 (DE-576)095299947 1873-4936 nnns volume:877 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_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2088 GBV_ILN_2106 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 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_4338 GBV_ILN_4393 GBV_ILN_4700 51.00 Werkstoffkunde: Allgemeines VZ AR 877 |
| spelling |
10.1016/j.msea.2023.145160 doi (DE-627)ELV010249575 (ELSEVIER)S0921-5093(23)00584-1 DE-627 ger DE-627 rda eng 600 670 530 VZ 51.00 bkl Li, Shaolong verfasserin aut High temperature softening mechanism of powder metallurgy TA15 alloy 2023 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The understanding of softening mechanisms for high-temperature titanium alloys at service temperature is essential to guarantee their service stability and safety. High-temperature softening is mainly manifested as grain boundary softening for metallic materials. To clarify the softening mechanism and failure mode of high-temperature titanium alloy TA15 (Ti-6.5Al–2Zr–1Mo–1V, wt.%) at temperature around service temperatures, coarse prior β grains were obtained by spark plasma sintering at 1300 °C, other than 1000 °C which is the traditional power metallurgy (P/M) consolidation temperature for TA15. Meanwhile, the effect of grain boundary softening was amplified. The high-temperature tensile test was carried out at 500–650 °C at intervals of 50 °C. The experimental results showed the maximum prior β grain size of P/M TA15 alloy is 2.9 μm, and its tensile strength decreases from 579 to 389 MPa with the increase of tensile temperature from 500 °C to 650 °C. Combined with calculation according to the Read-Shockley formula and analysis by macro-fracture, which show that the grain boundary strength is higher than the grain strength at 500 and 550 °C, and there are obvious grain and phase boundary torsion. The fracture mode demonstrated as a trans-granular fracture. The specimens soften rapidly, grain boundary strength decreases to less than grain strength, which led to fracture mode changed to inter-granular fracture at tensile temperatures up to 600 °C. If the crack extends to the critical length, the stress at the crack tip reaches easily the fracture strength of P/M TA15 alloy, and crack propagates rapidly at the temperature above 600 °C. Moreover, which corresponds to the elongation of true stress-strain decreasing with the increase of test temperature. OM and EBSD result demonstrated that the equi-cohesive temperature of TA15 alloy between 550 °C and 600 °C. Our findings provide a promising route to improve service temperature of high temperature TA15 alloy by raising the equi-cohesive temperature area in zone Ⅱ to a higher temperature. TA15 alloy High-temperature tensile property High-temperature softening mechanism Equi-cohesive temperature Li, Shufeng verfasserin (orcid)0000-0003-4348-8491 aut Liu, Lei verfasserin aut Gao, Lina verfasserin aut Fu, Yabo verfasserin aut Zhang, Xin verfasserin (orcid)0000-0001-7224-2090 aut Li, Bo verfasserin aut Enthalten in Materials science and engineering / A Amsterdam : Elsevier, 1988 877 Online-Ressource (DE-627)320500497 (DE-600)2012154-4 (DE-576)095299947 1873-4936 nnns volume:877 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_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2088 GBV_ILN_2106 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 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_4338 GBV_ILN_4393 GBV_ILN_4700 51.00 Werkstoffkunde: Allgemeines VZ AR 877 |
| allfields_unstemmed |
10.1016/j.msea.2023.145160 doi (DE-627)ELV010249575 (ELSEVIER)S0921-5093(23)00584-1 DE-627 ger DE-627 rda eng 600 670 530 VZ 51.00 bkl Li, Shaolong verfasserin aut High temperature softening mechanism of powder metallurgy TA15 alloy 2023 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The understanding of softening mechanisms for high-temperature titanium alloys at service temperature is essential to guarantee their service stability and safety. High-temperature softening is mainly manifested as grain boundary softening for metallic materials. To clarify the softening mechanism and failure mode of high-temperature titanium alloy TA15 (Ti-6.5Al–2Zr–1Mo–1V, wt.%) at temperature around service temperatures, coarse prior β grains were obtained by spark plasma sintering at 1300 °C, other than 1000 °C which is the traditional power metallurgy (P/M) consolidation temperature for TA15. Meanwhile, the effect of grain boundary softening was amplified. The high-temperature tensile test was carried out at 500–650 °C at intervals of 50 °C. The experimental results showed the maximum prior β grain size of P/M TA15 alloy is 2.9 μm, and its tensile strength decreases from 579 to 389 MPa with the increase of tensile temperature from 500 °C to 650 °C. Combined with calculation according to the Read-Shockley formula and analysis by macro-fracture, which show that the grain boundary strength is higher than the grain strength at 500 and 550 °C, and there are obvious grain and phase boundary torsion. The fracture mode demonstrated as a trans-granular fracture. The specimens soften rapidly, grain boundary strength decreases to less than grain strength, which led to fracture mode changed to inter-granular fracture at tensile temperatures up to 600 °C. If the crack extends to the critical length, the stress at the crack tip reaches easily the fracture strength of P/M TA15 alloy, and crack propagates rapidly at the temperature above 600 °C. Moreover, which corresponds to the elongation of true stress-strain decreasing with the increase of test temperature. OM and EBSD result demonstrated that the equi-cohesive temperature of TA15 alloy between 550 °C and 600 °C. Our findings provide a promising route to improve service temperature of high temperature TA15 alloy by raising the equi-cohesive temperature area in zone Ⅱ to a higher temperature. TA15 alloy High-temperature tensile property High-temperature softening mechanism Equi-cohesive temperature Li, Shufeng verfasserin (orcid)0000-0003-4348-8491 aut Liu, Lei verfasserin aut Gao, Lina verfasserin aut Fu, Yabo verfasserin aut Zhang, Xin verfasserin (orcid)0000-0001-7224-2090 aut Li, Bo verfasserin aut Enthalten in Materials science and engineering / A Amsterdam : Elsevier, 1988 877 Online-Ressource (DE-627)320500497 (DE-600)2012154-4 (DE-576)095299947 1873-4936 nnns volume:877 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_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2088 GBV_ILN_2106 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 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_4338 GBV_ILN_4393 GBV_ILN_4700 51.00 Werkstoffkunde: Allgemeines VZ AR 877 |
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10.1016/j.msea.2023.145160 doi (DE-627)ELV010249575 (ELSEVIER)S0921-5093(23)00584-1 DE-627 ger DE-627 rda eng 600 670 530 VZ 51.00 bkl Li, Shaolong verfasserin aut High temperature softening mechanism of powder metallurgy TA15 alloy 2023 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The understanding of softening mechanisms for high-temperature titanium alloys at service temperature is essential to guarantee their service stability and safety. High-temperature softening is mainly manifested as grain boundary softening for metallic materials. To clarify the softening mechanism and failure mode of high-temperature titanium alloy TA15 (Ti-6.5Al–2Zr–1Mo–1V, wt.%) at temperature around service temperatures, coarse prior β grains were obtained by spark plasma sintering at 1300 °C, other than 1000 °C which is the traditional power metallurgy (P/M) consolidation temperature for TA15. Meanwhile, the effect of grain boundary softening was amplified. The high-temperature tensile test was carried out at 500–650 °C at intervals of 50 °C. The experimental results showed the maximum prior β grain size of P/M TA15 alloy is 2.9 μm, and its tensile strength decreases from 579 to 389 MPa with the increase of tensile temperature from 500 °C to 650 °C. Combined with calculation according to the Read-Shockley formula and analysis by macro-fracture, which show that the grain boundary strength is higher than the grain strength at 500 and 550 °C, and there are obvious grain and phase boundary torsion. The fracture mode demonstrated as a trans-granular fracture. The specimens soften rapidly, grain boundary strength decreases to less than grain strength, which led to fracture mode changed to inter-granular fracture at tensile temperatures up to 600 °C. If the crack extends to the critical length, the stress at the crack tip reaches easily the fracture strength of P/M TA15 alloy, and crack propagates rapidly at the temperature above 600 °C. Moreover, which corresponds to the elongation of true stress-strain decreasing with the increase of test temperature. OM and EBSD result demonstrated that the equi-cohesive temperature of TA15 alloy between 550 °C and 600 °C. Our findings provide a promising route to improve service temperature of high temperature TA15 alloy by raising the equi-cohesive temperature area in zone Ⅱ to a higher temperature. TA15 alloy High-temperature tensile property High-temperature softening mechanism Equi-cohesive temperature Li, Shufeng verfasserin (orcid)0000-0003-4348-8491 aut Liu, Lei verfasserin aut Gao, Lina verfasserin aut Fu, Yabo verfasserin aut Zhang, Xin verfasserin (orcid)0000-0001-7224-2090 aut Li, Bo verfasserin aut Enthalten in Materials science and engineering / A Amsterdam : Elsevier, 1988 877 Online-Ressource (DE-627)320500497 (DE-600)2012154-4 (DE-576)095299947 1873-4936 nnns volume:877 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_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2088 GBV_ILN_2106 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 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_4338 GBV_ILN_4393 GBV_ILN_4700 51.00 Werkstoffkunde: Allgemeines VZ AR 877 |
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10.1016/j.msea.2023.145160 doi (DE-627)ELV010249575 (ELSEVIER)S0921-5093(23)00584-1 DE-627 ger DE-627 rda eng 600 670 530 VZ 51.00 bkl Li, Shaolong verfasserin aut High temperature softening mechanism of powder metallurgy TA15 alloy 2023 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The understanding of softening mechanisms for high-temperature titanium alloys at service temperature is essential to guarantee their service stability and safety. High-temperature softening is mainly manifested as grain boundary softening for metallic materials. To clarify the softening mechanism and failure mode of high-temperature titanium alloy TA15 (Ti-6.5Al–2Zr–1Mo–1V, wt.%) at temperature around service temperatures, coarse prior β grains were obtained by spark plasma sintering at 1300 °C, other than 1000 °C which is the traditional power metallurgy (P/M) consolidation temperature for TA15. Meanwhile, the effect of grain boundary softening was amplified. The high-temperature tensile test was carried out at 500–650 °C at intervals of 50 °C. The experimental results showed the maximum prior β grain size of P/M TA15 alloy is 2.9 μm, and its tensile strength decreases from 579 to 389 MPa with the increase of tensile temperature from 500 °C to 650 °C. Combined with calculation according to the Read-Shockley formula and analysis by macro-fracture, which show that the grain boundary strength is higher than the grain strength at 500 and 550 °C, and there are obvious grain and phase boundary torsion. The fracture mode demonstrated as a trans-granular fracture. The specimens soften rapidly, grain boundary strength decreases to less than grain strength, which led to fracture mode changed to inter-granular fracture at tensile temperatures up to 600 °C. If the crack extends to the critical length, the stress at the crack tip reaches easily the fracture strength of P/M TA15 alloy, and crack propagates rapidly at the temperature above 600 °C. Moreover, which corresponds to the elongation of true stress-strain decreasing with the increase of test temperature. OM and EBSD result demonstrated that the equi-cohesive temperature of TA15 alloy between 550 °C and 600 °C. Our findings provide a promising route to improve service temperature of high temperature TA15 alloy by raising the equi-cohesive temperature area in zone Ⅱ to a higher temperature. TA15 alloy High-temperature tensile property High-temperature softening mechanism Equi-cohesive temperature Li, Shufeng verfasserin (orcid)0000-0003-4348-8491 aut Liu, Lei verfasserin aut Gao, Lina verfasserin aut Fu, Yabo verfasserin aut Zhang, Xin verfasserin (orcid)0000-0001-7224-2090 aut Li, Bo verfasserin aut Enthalten in Materials science and engineering / A Amsterdam : Elsevier, 1988 877 Online-Ressource (DE-627)320500497 (DE-600)2012154-4 (DE-576)095299947 1873-4936 nnns volume:877 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_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_187 GBV_ILN_213 GBV_ILN_224 GBV_ILN_230 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2007 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2088 GBV_ILN_2106 GBV_ILN_2110 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_2336 GBV_ILN_2470 GBV_ILN_2507 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4242 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 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_4338 GBV_ILN_4393 GBV_ILN_4700 51.00 Werkstoffkunde: Allgemeines VZ AR 877 |
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High-temperature softening is mainly manifested as grain boundary softening for metallic materials. To clarify the softening mechanism and failure mode of high-temperature titanium alloy TA15 (Ti-6.5Al–2Zr–1Mo–1V, wt.%) at temperature around service temperatures, coarse prior β grains were obtained by spark plasma sintering at 1300 °C, other than 1000 °C which is the traditional power metallurgy (P/M) consolidation temperature for TA15. Meanwhile, the effect of grain boundary softening was amplified. The high-temperature tensile test was carried out at 500–650 °C at intervals of 50 °C. The experimental results showed the maximum prior β grain size of P/M TA15 alloy is 2.9 μm, and its tensile strength decreases from 579 to 389 MPa with the increase of tensile temperature from 500 °C to 650 °C. Combined with calculation according to the Read-Shockley formula and analysis by macro-fracture, which show that the grain boundary strength is higher than the grain strength at 500 and 550 °C, and there are obvious grain and phase boundary torsion. The fracture mode demonstrated as a trans-granular fracture. The specimens soften rapidly, grain boundary strength decreases to less than grain strength, which led to fracture mode changed to inter-granular fracture at tensile temperatures up to 600 °C. If the crack extends to the critical length, the stress at the crack tip reaches easily the fracture strength of P/M TA15 alloy, and crack propagates rapidly at the temperature above 600 °C. Moreover, which corresponds to the elongation of true stress-strain decreasing with the increase of test temperature. OM and EBSD result demonstrated that the equi-cohesive temperature of TA15 alloy between 550 °C and 600 °C. 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Li, Shaolong |
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Li, Shaolong ddc 600 bkl 51.00 misc TA15 alloy misc High-temperature tensile property misc High-temperature softening mechanism misc Equi-cohesive temperature High temperature softening mechanism of powder metallurgy TA15 alloy |
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600 670 530 VZ 51.00 bkl High temperature softening mechanism of powder metallurgy TA15 alloy TA15 alloy High-temperature tensile property High-temperature softening mechanism Equi-cohesive temperature |
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ddc 600 bkl 51.00 misc TA15 alloy misc High-temperature tensile property misc High-temperature softening mechanism misc Equi-cohesive temperature |
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high temperature softening mechanism of powder metallurgy ta15 alloy |
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High temperature softening mechanism of powder metallurgy TA15 alloy |
| abstract |
The understanding of softening mechanisms for high-temperature titanium alloys at service temperature is essential to guarantee their service stability and safety. High-temperature softening is mainly manifested as grain boundary softening for metallic materials. To clarify the softening mechanism and failure mode of high-temperature titanium alloy TA15 (Ti-6.5Al–2Zr–1Mo–1V, wt.%) at temperature around service temperatures, coarse prior β grains were obtained by spark plasma sintering at 1300 °C, other than 1000 °C which is the traditional power metallurgy (P/M) consolidation temperature for TA15. Meanwhile, the effect of grain boundary softening was amplified. The high-temperature tensile test was carried out at 500–650 °C at intervals of 50 °C. The experimental results showed the maximum prior β grain size of P/M TA15 alloy is 2.9 μm, and its tensile strength decreases from 579 to 389 MPa with the increase of tensile temperature from 500 °C to 650 °C. Combined with calculation according to the Read-Shockley formula and analysis by macro-fracture, which show that the grain boundary strength is higher than the grain strength at 500 and 550 °C, and there are obvious grain and phase boundary torsion. The fracture mode demonstrated as a trans-granular fracture. The specimens soften rapidly, grain boundary strength decreases to less than grain strength, which led to fracture mode changed to inter-granular fracture at tensile temperatures up to 600 °C. If the crack extends to the critical length, the stress at the crack tip reaches easily the fracture strength of P/M TA15 alloy, and crack propagates rapidly at the temperature above 600 °C. Moreover, which corresponds to the elongation of true stress-strain decreasing with the increase of test temperature. OM and EBSD result demonstrated that the equi-cohesive temperature of TA15 alloy between 550 °C and 600 °C. Our findings provide a promising route to improve service temperature of high temperature TA15 alloy by raising the equi-cohesive temperature area in zone Ⅱ to a higher temperature. |
| abstractGer |
The understanding of softening mechanisms for high-temperature titanium alloys at service temperature is essential to guarantee their service stability and safety. High-temperature softening is mainly manifested as grain boundary softening for metallic materials. To clarify the softening mechanism and failure mode of high-temperature titanium alloy TA15 (Ti-6.5Al–2Zr–1Mo–1V, wt.%) at temperature around service temperatures, coarse prior β grains were obtained by spark plasma sintering at 1300 °C, other than 1000 °C which is the traditional power metallurgy (P/M) consolidation temperature for TA15. Meanwhile, the effect of grain boundary softening was amplified. The high-temperature tensile test was carried out at 500–650 °C at intervals of 50 °C. The experimental results showed the maximum prior β grain size of P/M TA15 alloy is 2.9 μm, and its tensile strength decreases from 579 to 389 MPa with the increase of tensile temperature from 500 °C to 650 °C. Combined with calculation according to the Read-Shockley formula and analysis by macro-fracture, which show that the grain boundary strength is higher than the grain strength at 500 and 550 °C, and there are obvious grain and phase boundary torsion. The fracture mode demonstrated as a trans-granular fracture. The specimens soften rapidly, grain boundary strength decreases to less than grain strength, which led to fracture mode changed to inter-granular fracture at tensile temperatures up to 600 °C. If the crack extends to the critical length, the stress at the crack tip reaches easily the fracture strength of P/M TA15 alloy, and crack propagates rapidly at the temperature above 600 °C. Moreover, which corresponds to the elongation of true stress-strain decreasing with the increase of test temperature. OM and EBSD result demonstrated that the equi-cohesive temperature of TA15 alloy between 550 °C and 600 °C. Our findings provide a promising route to improve service temperature of high temperature TA15 alloy by raising the equi-cohesive temperature area in zone Ⅱ to a higher temperature. |
| abstract_unstemmed |
The understanding of softening mechanisms for high-temperature titanium alloys at service temperature is essential to guarantee their service stability and safety. High-temperature softening is mainly manifested as grain boundary softening for metallic materials. To clarify the softening mechanism and failure mode of high-temperature titanium alloy TA15 (Ti-6.5Al–2Zr–1Mo–1V, wt.%) at temperature around service temperatures, coarse prior β grains were obtained by spark plasma sintering at 1300 °C, other than 1000 °C which is the traditional power metallurgy (P/M) consolidation temperature for TA15. Meanwhile, the effect of grain boundary softening was amplified. The high-temperature tensile test was carried out at 500–650 °C at intervals of 50 °C. The experimental results showed the maximum prior β grain size of P/M TA15 alloy is 2.9 μm, and its tensile strength decreases from 579 to 389 MPa with the increase of tensile temperature from 500 °C to 650 °C. Combined with calculation according to the Read-Shockley formula and analysis by macro-fracture, which show that the grain boundary strength is higher than the grain strength at 500 and 550 °C, and there are obvious grain and phase boundary torsion. The fracture mode demonstrated as a trans-granular fracture. The specimens soften rapidly, grain boundary strength decreases to less than grain strength, which led to fracture mode changed to inter-granular fracture at tensile temperatures up to 600 °C. If the crack extends to the critical length, the stress at the crack tip reaches easily the fracture strength of P/M TA15 alloy, and crack propagates rapidly at the temperature above 600 °C. Moreover, which corresponds to the elongation of true stress-strain decreasing with the increase of test temperature. OM and EBSD result demonstrated that the equi-cohesive temperature of TA15 alloy between 550 °C and 600 °C. Our findings provide a promising route to improve service temperature of high temperature TA15 alloy by raising the equi-cohesive temperature area in zone Ⅱ to a higher temperature. |
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