Influence of heterogeneous microstructures on the mechanical properties of low-temperature friction stir processed AZ91D Mg alloy
A coarse homogeneous grain structure with a strong basal texture intensity is usually formed in AZ91D Mg alloy, which is produced by friction stir processing, and its strength and ductility are often unsatisfactory. In this work, the microstructure and mechanical properties of die-cast AZ91D were mo...
Ausführliche Beschreibung
Autor*in: |
Xu, Nan [verfasserIn] |
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E-Artikel |
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Englisch |
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2021transfer abstract |
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Übergeordnetes Werk: |
Enthalten in: Generation of 3X FLAG-tagged human embryonic stem cell (hESC) line to study WNT-induced β-catenin DNA interactions (HVRDe009-A-2) - Cutts, Joshua ELSEVIER, 2021, Amsterdam |
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Übergeordnetes Werk: |
volume:809 ; year:2021 ; day:30 ; month:03 ; pages:0 |
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DOI / URN: |
10.1016/j.msea.2021.141004 |
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520 | |a A coarse homogeneous grain structure with a strong basal texture intensity is usually formed in AZ91D Mg alloy, which is produced by friction stir processing, and its strength and ductility are often unsatisfactory. In this work, the microstructure and mechanical properties of die-cast AZ91D were modified using low-temperature friction stir processing. A fine-grained structure was obtained in the stir zone, and abundant {10–12} twins, dislocations, and β-Mg17Al12 precipitates formed in the grains. The grain refinement mechanism was determined to be a mixture of continuous dynamic recrystallization, twinning-induced dynamic recrystallization, and particle-stimulated nucleation recrystallization. The appearance of a heterogeneous microstructure was attributed to the low heat input. The new grains originated from the {10–12} twins and randomized {0002} basal texture, and various strengthening mechanisms contributed to the increased yield strength. The {10–12} twin boundaries provided more locations for dislocation nucleation and slip, which increased the strain hardening capacity and ductility; therefore, a satisfactory combination of strength and ductility with a strength of 294 MPa and a total elongation of 18% was obtained in the stir zone. This study provides an efficient one-step strategy to produce heterogeneous grain structures that can balance the strength and ductility of AZ91D without using a cooling medium. | ||
520 | |a A coarse homogeneous grain structure with a strong basal texture intensity is usually formed in AZ91D Mg alloy, which is produced by friction stir processing, and its strength and ductility are often unsatisfactory. In this work, the microstructure and mechanical properties of die-cast AZ91D were modified using low-temperature friction stir processing. A fine-grained structure was obtained in the stir zone, and abundant {10–12} twins, dislocations, and β-Mg17Al12 precipitates formed in the grains. The grain refinement mechanism was determined to be a mixture of continuous dynamic recrystallization, twinning-induced dynamic recrystallization, and particle-stimulated nucleation recrystallization. The appearance of a heterogeneous microstructure was attributed to the low heat input. The new grains originated from the {10–12} twins and randomized {0002} basal texture, and various strengthening mechanisms contributed to the increased yield strength. The {10–12} twin boundaries provided more locations for dislocation nucleation and slip, which increased the strain hardening capacity and ductility; therefore, a satisfactory combination of strength and ductility with a strength of 294 MPa and a total elongation of 18% was obtained in the stir zone. This study provides an efficient one-step strategy to produce heterogeneous grain structures that can balance the strength and ductility of AZ91D without using a cooling medium. | ||
650 | 7 | |a Mg alloy |2 Elsevier | |
650 | 7 | |a Recrystallization |2 Elsevier | |
650 | 7 | |a Mechanical properties |2 Elsevier | |
650 | 7 | |a Friction stir processing |2 Elsevier | |
650 | 7 | |a Microstructure |2 Elsevier | |
700 | 1 | |a Feng, Ruo-Nan |4 oth | |
700 | 1 | |a Song, Qi-Ning |4 oth | |
700 | 1 | |a Zhao, Jian-Hua |4 oth | |
700 | 1 | |a Bao, Ye-Feng |4 oth | |
773 | 0 | 8 | |i Enthalten in |n Elsevier |a Cutts, Joshua ELSEVIER |t Generation of 3X FLAG-tagged human embryonic stem cell (hESC) line to study WNT-induced β-catenin DNA interactions (HVRDe009-A-2) |d 2021 |g Amsterdam |w (DE-627)ELV007117167 |
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10.1016/j.msea.2021.141004 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001327.pica (DE-627)ELV053405870 (ELSEVIER)S0921-5093(21)00273-2 DE-627 ger DE-627 rakwb eng 570 VZ Xu, Nan verfasserin aut Influence of heterogeneous microstructures on the mechanical properties of low-temperature friction stir processed AZ91D Mg alloy 2021transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier A coarse homogeneous grain structure with a strong basal texture intensity is usually formed in AZ91D Mg alloy, which is produced by friction stir processing, and its strength and ductility are often unsatisfactory. In this work, the microstructure and mechanical properties of die-cast AZ91D were modified using low-temperature friction stir processing. A fine-grained structure was obtained in the stir zone, and abundant {10–12} twins, dislocations, and β-Mg17Al12 precipitates formed in the grains. The grain refinement mechanism was determined to be a mixture of continuous dynamic recrystallization, twinning-induced dynamic recrystallization, and particle-stimulated nucleation recrystallization. The appearance of a heterogeneous microstructure was attributed to the low heat input. The new grains originated from the {10–12} twins and randomized {0002} basal texture, and various strengthening mechanisms contributed to the increased yield strength. The {10–12} twin boundaries provided more locations for dislocation nucleation and slip, which increased the strain hardening capacity and ductility; therefore, a satisfactory combination of strength and ductility with a strength of 294 MPa and a total elongation of 18% was obtained in the stir zone. This study provides an efficient one-step strategy to produce heterogeneous grain structures that can balance the strength and ductility of AZ91D without using a cooling medium. A coarse homogeneous grain structure with a strong basal texture intensity is usually formed in AZ91D Mg alloy, which is produced by friction stir processing, and its strength and ductility are often unsatisfactory. In this work, the microstructure and mechanical properties of die-cast AZ91D were modified using low-temperature friction stir processing. A fine-grained structure was obtained in the stir zone, and abundant {10–12} twins, dislocations, and β-Mg17Al12 precipitates formed in the grains. The grain refinement mechanism was determined to be a mixture of continuous dynamic recrystallization, twinning-induced dynamic recrystallization, and particle-stimulated nucleation recrystallization. The appearance of a heterogeneous microstructure was attributed to the low heat input. The new grains originated from the {10–12} twins and randomized {0002} basal texture, and various strengthening mechanisms contributed to the increased yield strength. The {10–12} twin boundaries provided more locations for dislocation nucleation and slip, which increased the strain hardening capacity and ductility; therefore, a satisfactory combination of strength and ductility with a strength of 294 MPa and a total elongation of 18% was obtained in the stir zone. This study provides an efficient one-step strategy to produce heterogeneous grain structures that can balance the strength and ductility of AZ91D without using a cooling medium. Mg alloy Elsevier Recrystallization Elsevier Mechanical properties Elsevier Friction stir processing Elsevier Microstructure Elsevier Feng, Ruo-Nan oth Song, Qi-Ning oth Zhao, Jian-Hua oth Bao, Ye-Feng oth Enthalten in Elsevier Cutts, Joshua ELSEVIER Generation of 3X FLAG-tagged human embryonic stem cell (hESC) line to study WNT-induced β-catenin DNA interactions (HVRDe009-A-2) 2021 Amsterdam (DE-627)ELV007117167 volume:809 year:2021 day:30 month:03 pages:0 https://doi.org/10.1016/j.msea.2021.141004 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA AR 809 2021 30 0330 0 |
spelling |
10.1016/j.msea.2021.141004 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001327.pica (DE-627)ELV053405870 (ELSEVIER)S0921-5093(21)00273-2 DE-627 ger DE-627 rakwb eng 570 VZ Xu, Nan verfasserin aut Influence of heterogeneous microstructures on the mechanical properties of low-temperature friction stir processed AZ91D Mg alloy 2021transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier A coarse homogeneous grain structure with a strong basal texture intensity is usually formed in AZ91D Mg alloy, which is produced by friction stir processing, and its strength and ductility are often unsatisfactory. In this work, the microstructure and mechanical properties of die-cast AZ91D were modified using low-temperature friction stir processing. A fine-grained structure was obtained in the stir zone, and abundant {10–12} twins, dislocations, and β-Mg17Al12 precipitates formed in the grains. The grain refinement mechanism was determined to be a mixture of continuous dynamic recrystallization, twinning-induced dynamic recrystallization, and particle-stimulated nucleation recrystallization. The appearance of a heterogeneous microstructure was attributed to the low heat input. The new grains originated from the {10–12} twins and randomized {0002} basal texture, and various strengthening mechanisms contributed to the increased yield strength. The {10–12} twin boundaries provided more locations for dislocation nucleation and slip, which increased the strain hardening capacity and ductility; therefore, a satisfactory combination of strength and ductility with a strength of 294 MPa and a total elongation of 18% was obtained in the stir zone. This study provides an efficient one-step strategy to produce heterogeneous grain structures that can balance the strength and ductility of AZ91D without using a cooling medium. A coarse homogeneous grain structure with a strong basal texture intensity is usually formed in AZ91D Mg alloy, which is produced by friction stir processing, and its strength and ductility are often unsatisfactory. In this work, the microstructure and mechanical properties of die-cast AZ91D were modified using low-temperature friction stir processing. A fine-grained structure was obtained in the stir zone, and abundant {10–12} twins, dislocations, and β-Mg17Al12 precipitates formed in the grains. The grain refinement mechanism was determined to be a mixture of continuous dynamic recrystallization, twinning-induced dynamic recrystallization, and particle-stimulated nucleation recrystallization. The appearance of a heterogeneous microstructure was attributed to the low heat input. The new grains originated from the {10–12} twins and randomized {0002} basal texture, and various strengthening mechanisms contributed to the increased yield strength. The {10–12} twin boundaries provided more locations for dislocation nucleation and slip, which increased the strain hardening capacity and ductility; therefore, a satisfactory combination of strength and ductility with a strength of 294 MPa and a total elongation of 18% was obtained in the stir zone. This study provides an efficient one-step strategy to produce heterogeneous grain structures that can balance the strength and ductility of AZ91D without using a cooling medium. Mg alloy Elsevier Recrystallization Elsevier Mechanical properties Elsevier Friction stir processing Elsevier Microstructure Elsevier Feng, Ruo-Nan oth Song, Qi-Ning oth Zhao, Jian-Hua oth Bao, Ye-Feng oth Enthalten in Elsevier Cutts, Joshua ELSEVIER Generation of 3X FLAG-tagged human embryonic stem cell (hESC) line to study WNT-induced β-catenin DNA interactions (HVRDe009-A-2) 2021 Amsterdam (DE-627)ELV007117167 volume:809 year:2021 day:30 month:03 pages:0 https://doi.org/10.1016/j.msea.2021.141004 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA AR 809 2021 30 0330 0 |
allfields_unstemmed |
10.1016/j.msea.2021.141004 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001327.pica (DE-627)ELV053405870 (ELSEVIER)S0921-5093(21)00273-2 DE-627 ger DE-627 rakwb eng 570 VZ Xu, Nan verfasserin aut Influence of heterogeneous microstructures on the mechanical properties of low-temperature friction stir processed AZ91D Mg alloy 2021transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier A coarse homogeneous grain structure with a strong basal texture intensity is usually formed in AZ91D Mg alloy, which is produced by friction stir processing, and its strength and ductility are often unsatisfactory. In this work, the microstructure and mechanical properties of die-cast AZ91D were modified using low-temperature friction stir processing. A fine-grained structure was obtained in the stir zone, and abundant {10–12} twins, dislocations, and β-Mg17Al12 precipitates formed in the grains. The grain refinement mechanism was determined to be a mixture of continuous dynamic recrystallization, twinning-induced dynamic recrystallization, and particle-stimulated nucleation recrystallization. The appearance of a heterogeneous microstructure was attributed to the low heat input. The new grains originated from the {10–12} twins and randomized {0002} basal texture, and various strengthening mechanisms contributed to the increased yield strength. The {10–12} twin boundaries provided more locations for dislocation nucleation and slip, which increased the strain hardening capacity and ductility; therefore, a satisfactory combination of strength and ductility with a strength of 294 MPa and a total elongation of 18% was obtained in the stir zone. This study provides an efficient one-step strategy to produce heterogeneous grain structures that can balance the strength and ductility of AZ91D without using a cooling medium. A coarse homogeneous grain structure with a strong basal texture intensity is usually formed in AZ91D Mg alloy, which is produced by friction stir processing, and its strength and ductility are often unsatisfactory. In this work, the microstructure and mechanical properties of die-cast AZ91D were modified using low-temperature friction stir processing. A fine-grained structure was obtained in the stir zone, and abundant {10–12} twins, dislocations, and β-Mg17Al12 precipitates formed in the grains. The grain refinement mechanism was determined to be a mixture of continuous dynamic recrystallization, twinning-induced dynamic recrystallization, and particle-stimulated nucleation recrystallization. The appearance of a heterogeneous microstructure was attributed to the low heat input. The new grains originated from the {10–12} twins and randomized {0002} basal texture, and various strengthening mechanisms contributed to the increased yield strength. The {10–12} twin boundaries provided more locations for dislocation nucleation and slip, which increased the strain hardening capacity and ductility; therefore, a satisfactory combination of strength and ductility with a strength of 294 MPa and a total elongation of 18% was obtained in the stir zone. This study provides an efficient one-step strategy to produce heterogeneous grain structures that can balance the strength and ductility of AZ91D without using a cooling medium. Mg alloy Elsevier Recrystallization Elsevier Mechanical properties Elsevier Friction stir processing Elsevier Microstructure Elsevier Feng, Ruo-Nan oth Song, Qi-Ning oth Zhao, Jian-Hua oth Bao, Ye-Feng oth Enthalten in Elsevier Cutts, Joshua ELSEVIER Generation of 3X FLAG-tagged human embryonic stem cell (hESC) line to study WNT-induced β-catenin DNA interactions (HVRDe009-A-2) 2021 Amsterdam (DE-627)ELV007117167 volume:809 year:2021 day:30 month:03 pages:0 https://doi.org/10.1016/j.msea.2021.141004 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA AR 809 2021 30 0330 0 |
allfieldsGer |
10.1016/j.msea.2021.141004 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001327.pica (DE-627)ELV053405870 (ELSEVIER)S0921-5093(21)00273-2 DE-627 ger DE-627 rakwb eng 570 VZ Xu, Nan verfasserin aut Influence of heterogeneous microstructures on the mechanical properties of low-temperature friction stir processed AZ91D Mg alloy 2021transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier A coarse homogeneous grain structure with a strong basal texture intensity is usually formed in AZ91D Mg alloy, which is produced by friction stir processing, and its strength and ductility are often unsatisfactory. In this work, the microstructure and mechanical properties of die-cast AZ91D were modified using low-temperature friction stir processing. A fine-grained structure was obtained in the stir zone, and abundant {10–12} twins, dislocations, and β-Mg17Al12 precipitates formed in the grains. The grain refinement mechanism was determined to be a mixture of continuous dynamic recrystallization, twinning-induced dynamic recrystallization, and particle-stimulated nucleation recrystallization. The appearance of a heterogeneous microstructure was attributed to the low heat input. The new grains originated from the {10–12} twins and randomized {0002} basal texture, and various strengthening mechanisms contributed to the increased yield strength. The {10–12} twin boundaries provided more locations for dislocation nucleation and slip, which increased the strain hardening capacity and ductility; therefore, a satisfactory combination of strength and ductility with a strength of 294 MPa and a total elongation of 18% was obtained in the stir zone. This study provides an efficient one-step strategy to produce heterogeneous grain structures that can balance the strength and ductility of AZ91D without using a cooling medium. A coarse homogeneous grain structure with a strong basal texture intensity is usually formed in AZ91D Mg alloy, which is produced by friction stir processing, and its strength and ductility are often unsatisfactory. In this work, the microstructure and mechanical properties of die-cast AZ91D were modified using low-temperature friction stir processing. A fine-grained structure was obtained in the stir zone, and abundant {10–12} twins, dislocations, and β-Mg17Al12 precipitates formed in the grains. The grain refinement mechanism was determined to be a mixture of continuous dynamic recrystallization, twinning-induced dynamic recrystallization, and particle-stimulated nucleation recrystallization. The appearance of a heterogeneous microstructure was attributed to the low heat input. The new grains originated from the {10–12} twins and randomized {0002} basal texture, and various strengthening mechanisms contributed to the increased yield strength. The {10–12} twin boundaries provided more locations for dislocation nucleation and slip, which increased the strain hardening capacity and ductility; therefore, a satisfactory combination of strength and ductility with a strength of 294 MPa and a total elongation of 18% was obtained in the stir zone. This study provides an efficient one-step strategy to produce heterogeneous grain structures that can balance the strength and ductility of AZ91D without using a cooling medium. Mg alloy Elsevier Recrystallization Elsevier Mechanical properties Elsevier Friction stir processing Elsevier Microstructure Elsevier Feng, Ruo-Nan oth Song, Qi-Ning oth Zhao, Jian-Hua oth Bao, Ye-Feng oth Enthalten in Elsevier Cutts, Joshua ELSEVIER Generation of 3X FLAG-tagged human embryonic stem cell (hESC) line to study WNT-induced β-catenin DNA interactions (HVRDe009-A-2) 2021 Amsterdam (DE-627)ELV007117167 volume:809 year:2021 day:30 month:03 pages:0 https://doi.org/10.1016/j.msea.2021.141004 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA AR 809 2021 30 0330 0 |
allfieldsSound |
10.1016/j.msea.2021.141004 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001327.pica (DE-627)ELV053405870 (ELSEVIER)S0921-5093(21)00273-2 DE-627 ger DE-627 rakwb eng 570 VZ Xu, Nan verfasserin aut Influence of heterogeneous microstructures on the mechanical properties of low-temperature friction stir processed AZ91D Mg alloy 2021transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier A coarse homogeneous grain structure with a strong basal texture intensity is usually formed in AZ91D Mg alloy, which is produced by friction stir processing, and its strength and ductility are often unsatisfactory. In this work, the microstructure and mechanical properties of die-cast AZ91D were modified using low-temperature friction stir processing. A fine-grained structure was obtained in the stir zone, and abundant {10–12} twins, dislocations, and β-Mg17Al12 precipitates formed in the grains. The grain refinement mechanism was determined to be a mixture of continuous dynamic recrystallization, twinning-induced dynamic recrystallization, and particle-stimulated nucleation recrystallization. The appearance of a heterogeneous microstructure was attributed to the low heat input. The new grains originated from the {10–12} twins and randomized {0002} basal texture, and various strengthening mechanisms contributed to the increased yield strength. The {10–12} twin boundaries provided more locations for dislocation nucleation and slip, which increased the strain hardening capacity and ductility; therefore, a satisfactory combination of strength and ductility with a strength of 294 MPa and a total elongation of 18% was obtained in the stir zone. This study provides an efficient one-step strategy to produce heterogeneous grain structures that can balance the strength and ductility of AZ91D without using a cooling medium. A coarse homogeneous grain structure with a strong basal texture intensity is usually formed in AZ91D Mg alloy, which is produced by friction stir processing, and its strength and ductility are often unsatisfactory. In this work, the microstructure and mechanical properties of die-cast AZ91D were modified using low-temperature friction stir processing. A fine-grained structure was obtained in the stir zone, and abundant {10–12} twins, dislocations, and β-Mg17Al12 precipitates formed in the grains. The grain refinement mechanism was determined to be a mixture of continuous dynamic recrystallization, twinning-induced dynamic recrystallization, and particle-stimulated nucleation recrystallization. The appearance of a heterogeneous microstructure was attributed to the low heat input. The new grains originated from the {10–12} twins and randomized {0002} basal texture, and various strengthening mechanisms contributed to the increased yield strength. The {10–12} twin boundaries provided more locations for dislocation nucleation and slip, which increased the strain hardening capacity and ductility; therefore, a satisfactory combination of strength and ductility with a strength of 294 MPa and a total elongation of 18% was obtained in the stir zone. This study provides an efficient one-step strategy to produce heterogeneous grain structures that can balance the strength and ductility of AZ91D without using a cooling medium. Mg alloy Elsevier Recrystallization Elsevier Mechanical properties Elsevier Friction stir processing Elsevier Microstructure Elsevier Feng, Ruo-Nan oth Song, Qi-Ning oth Zhao, Jian-Hua oth Bao, Ye-Feng oth Enthalten in Elsevier Cutts, Joshua ELSEVIER Generation of 3X FLAG-tagged human embryonic stem cell (hESC) line to study WNT-induced β-catenin DNA interactions (HVRDe009-A-2) 2021 Amsterdam (DE-627)ELV007117167 volume:809 year:2021 day:30 month:03 pages:0 https://doi.org/10.1016/j.msea.2021.141004 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA AR 809 2021 30 0330 0 |
language |
English |
source |
Enthalten in Generation of 3X FLAG-tagged human embryonic stem cell (hESC) line to study WNT-induced β-catenin DNA interactions (HVRDe009-A-2) Amsterdam volume:809 year:2021 day:30 month:03 pages:0 |
sourceStr |
Enthalten in Generation of 3X FLAG-tagged human embryonic stem cell (hESC) line to study WNT-induced β-catenin DNA interactions (HVRDe009-A-2) Amsterdam volume:809 year:2021 day:30 month:03 pages:0 |
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Generation of 3X FLAG-tagged human embryonic stem cell (hESC) line to study WNT-induced β-catenin DNA interactions (HVRDe009-A-2) |
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In this work, the microstructure and mechanical properties of die-cast AZ91D were modified using low-temperature friction stir processing. A fine-grained structure was obtained in the stir zone, and abundant {10–12} twins, dislocations, and β-Mg17Al12 precipitates formed in the grains. The grain refinement mechanism was determined to be a mixture of continuous dynamic recrystallization, twinning-induced dynamic recrystallization, and particle-stimulated nucleation recrystallization. The appearance of a heterogeneous microstructure was attributed to the low heat input. The new grains originated from the {10–12} twins and randomized {0002} basal texture, and various strengthening mechanisms contributed to the increased yield strength. The {10–12} twin boundaries provided more locations for dislocation nucleation and slip, which increased the strain hardening capacity and ductility; therefore, a satisfactory combination of strength and ductility with a strength of 294 MPa and a total elongation of 18% was obtained in the stir zone. This study provides an efficient one-step strategy to produce heterogeneous grain structures that can balance the strength and ductility of AZ91D without using a cooling medium.</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">A coarse homogeneous grain structure with a strong basal texture intensity is usually formed in AZ91D Mg alloy, which is produced by friction stir processing, and its strength and ductility are often unsatisfactory. In this work, the microstructure and mechanical properties of die-cast AZ91D were modified using low-temperature friction stir processing. A fine-grained structure was obtained in the stir zone, and abundant {10–12} twins, dislocations, and β-Mg17Al12 precipitates formed in the grains. The grain refinement mechanism was determined to be a mixture of continuous dynamic recrystallization, twinning-induced dynamic recrystallization, and particle-stimulated nucleation recrystallization. The appearance of a heterogeneous microstructure was attributed to the low heat input. The new grains originated from the {10–12} twins and randomized {0002} basal texture, and various strengthening mechanisms contributed to the increased yield strength. The {10–12} twin boundaries provided more locations for dislocation nucleation and slip, which increased the strain hardening capacity and ductility; therefore, a satisfactory combination of strength and ductility with a strength of 294 MPa and a total elongation of 18% was obtained in the stir zone. 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influence of heterogeneous microstructures on the mechanical properties of low-temperature friction stir processed az91d mg alloy |
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Influence of heterogeneous microstructures on the mechanical properties of low-temperature friction stir processed AZ91D Mg alloy |
abstract |
A coarse homogeneous grain structure with a strong basal texture intensity is usually formed in AZ91D Mg alloy, which is produced by friction stir processing, and its strength and ductility are often unsatisfactory. In this work, the microstructure and mechanical properties of die-cast AZ91D were modified using low-temperature friction stir processing. A fine-grained structure was obtained in the stir zone, and abundant {10–12} twins, dislocations, and β-Mg17Al12 precipitates formed in the grains. The grain refinement mechanism was determined to be a mixture of continuous dynamic recrystallization, twinning-induced dynamic recrystallization, and particle-stimulated nucleation recrystallization. The appearance of a heterogeneous microstructure was attributed to the low heat input. The new grains originated from the {10–12} twins and randomized {0002} basal texture, and various strengthening mechanisms contributed to the increased yield strength. The {10–12} twin boundaries provided more locations for dislocation nucleation and slip, which increased the strain hardening capacity and ductility; therefore, a satisfactory combination of strength and ductility with a strength of 294 MPa and a total elongation of 18% was obtained in the stir zone. This study provides an efficient one-step strategy to produce heterogeneous grain structures that can balance the strength and ductility of AZ91D without using a cooling medium. |
abstractGer |
A coarse homogeneous grain structure with a strong basal texture intensity is usually formed in AZ91D Mg alloy, which is produced by friction stir processing, and its strength and ductility are often unsatisfactory. In this work, the microstructure and mechanical properties of die-cast AZ91D were modified using low-temperature friction stir processing. A fine-grained structure was obtained in the stir zone, and abundant {10–12} twins, dislocations, and β-Mg17Al12 precipitates formed in the grains. The grain refinement mechanism was determined to be a mixture of continuous dynamic recrystallization, twinning-induced dynamic recrystallization, and particle-stimulated nucleation recrystallization. The appearance of a heterogeneous microstructure was attributed to the low heat input. The new grains originated from the {10–12} twins and randomized {0002} basal texture, and various strengthening mechanisms contributed to the increased yield strength. The {10–12} twin boundaries provided more locations for dislocation nucleation and slip, which increased the strain hardening capacity and ductility; therefore, a satisfactory combination of strength and ductility with a strength of 294 MPa and a total elongation of 18% was obtained in the stir zone. This study provides an efficient one-step strategy to produce heterogeneous grain structures that can balance the strength and ductility of AZ91D without using a cooling medium. |
abstract_unstemmed |
A coarse homogeneous grain structure with a strong basal texture intensity is usually formed in AZ91D Mg alloy, which is produced by friction stir processing, and its strength and ductility are often unsatisfactory. In this work, the microstructure and mechanical properties of die-cast AZ91D were modified using low-temperature friction stir processing. A fine-grained structure was obtained in the stir zone, and abundant {10–12} twins, dislocations, and β-Mg17Al12 precipitates formed in the grains. The grain refinement mechanism was determined to be a mixture of continuous dynamic recrystallization, twinning-induced dynamic recrystallization, and particle-stimulated nucleation recrystallization. The appearance of a heterogeneous microstructure was attributed to the low heat input. The new grains originated from the {10–12} twins and randomized {0002} basal texture, and various strengthening mechanisms contributed to the increased yield strength. The {10–12} twin boundaries provided more locations for dislocation nucleation and slip, which increased the strain hardening capacity and ductility; therefore, a satisfactory combination of strength and ductility with a strength of 294 MPa and a total elongation of 18% was obtained in the stir zone. This study provides an efficient one-step strategy to produce heterogeneous grain structures that can balance the strength and ductility of AZ91D without using a cooling medium. |
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Influence of heterogeneous microstructures on the mechanical properties of low-temperature friction stir processed AZ91D Mg alloy |
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