The effect of thermo-mechanical treatment on the formation of T1 phase and δ′/θ′/δ′ composite precipitate in an Al-Cu-Li-Mg alloy
The T1-precipitates and δ′/θ′/δ′ composite precipitates are the two primary strengthening precipitates and co-exist in the age-hardened 3rd generation AlLi alloys. The relative proportion of these two types of precipitates formed in the alloys is strongly dependent of the thermo-mechanical-treatment...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Li, Shiyong [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2021transfer abstract |
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| Übergeordnetes Werk: |
Enthalten in: Genotype-by-environment interactions and sexual selection - Shuker, David M. ELSEVIER, 2015, an international journal on materials structure and behavior, New York, NY |
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| Übergeordnetes Werk: |
volume:176 ; year:2021 ; pages:0 |
| Links: |
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| DOI / URN: |
10.1016/j.matchar.2021.111123 |
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| 245 | 1 | 4 | |a The effect of thermo-mechanical treatment on the formation of T1 phase and δ′/θ′/δ′ composite precipitate in an Al-Cu-Li-Mg alloy |
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| 520 | |a The T1-precipitates and δ′/θ′/δ′ composite precipitates are the two primary strengthening precipitates and co-exist in the age-hardened 3rd generation AlLi alloys. The relative proportion of these two types of precipitates formed in the alloys is strongly dependent of the thermo-mechanical-treatment (TMT) processes applied. In the present study, using electron microscopy and properties characterization, the competitive precipitation behaviors of these two types of precipitates in an Al-4.0Cu-0.9Li-0.2Mg (wt.%) alloy, and the property of the alloy were investigated systematically in relation to TMT processes employed. It is shown that a 5% pre-deformation can promote the formation of T1 precipitates but depress the δ′/θ′/δ′ composite precipitates, which improves the strength but decreases the plasticity of the alloy significantly. A pre-natural-aging will promote the fine δ′/θ′/δ′ composite precipitates and T1 precipitates to form uniformly during subsequent artificial aging, improving the strength while maintaining good plasticity. A pre-artificial-aging at 180 °C will depress the formation of T1 precipitates, and greatly reduce the plasticity of the alloy. Our study indicates that when the T1 and the δ′/θ′/δ′ precipitates are equally developed, the alloy may achieve optimized properties. | ||
| 520 | |a The T1-precipitates and δ′/θ′/δ′ composite precipitates are the two primary strengthening precipitates and co-exist in the age-hardened 3rd generation AlLi alloys. The relative proportion of these two types of precipitates formed in the alloys is strongly dependent of the thermo-mechanical-treatment (TMT) processes applied. In the present study, using electron microscopy and properties characterization, the competitive precipitation behaviors of these two types of precipitates in an Al-4.0Cu-0.9Li-0.2Mg (wt.%) alloy, and the property of the alloy were investigated systematically in relation to TMT processes employed. It is shown that a 5% pre-deformation can promote the formation of T1 precipitates but depress the δ′/θ′/δ′ composite precipitates, which improves the strength but decreases the plasticity of the alloy significantly. A pre-natural-aging will promote the fine δ′/θ′/δ′ composite precipitates and T1 precipitates to form uniformly during subsequent artificial aging, improving the strength while maintaining good plasticity. A pre-artificial-aging at 180 °C will depress the formation of T1 precipitates, and greatly reduce the plasticity of the alloy. Our study indicates that when the T1 and the δ′/θ′/δ′ precipitates are equally developed, the alloy may achieve optimized properties. | ||
| 700 | 1 | |a Wang, Qi |4 oth | |
| 700 | 1 | |a Chen, Jianghua |4 oth | |
| 700 | 1 | |a Wu, Cuilan |4 oth | |
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10.1016/j.matchar.2021.111123 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001395.pica (DE-627)ELV054058287 (ELSEVIER)S1044-5803(21)00253-9 DE-627 ger DE-627 rakwb eng 150 VZ 620 VZ 52.56 bkl Li, Shiyong verfasserin aut The effect of thermo-mechanical treatment on the formation of T1 phase and δ′/θ′/δ′ composite precipitate in an Al-Cu-Li-Mg alloy 2021transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The T1-precipitates and δ′/θ′/δ′ composite precipitates are the two primary strengthening precipitates and co-exist in the age-hardened 3rd generation AlLi alloys. The relative proportion of these two types of precipitates formed in the alloys is strongly dependent of the thermo-mechanical-treatment (TMT) processes applied. In the present study, using electron microscopy and properties characterization, the competitive precipitation behaviors of these two types of precipitates in an Al-4.0Cu-0.9Li-0.2Mg (wt.%) alloy, and the property of the alloy were investigated systematically in relation to TMT processes employed. It is shown that a 5% pre-deformation can promote the formation of T1 precipitates but depress the δ′/θ′/δ′ composite precipitates, which improves the strength but decreases the plasticity of the alloy significantly. A pre-natural-aging will promote the fine δ′/θ′/δ′ composite precipitates and T1 precipitates to form uniformly during subsequent artificial aging, improving the strength while maintaining good plasticity. A pre-artificial-aging at 180 °C will depress the formation of T1 precipitates, and greatly reduce the plasticity of the alloy. Our study indicates that when the T1 and the δ′/θ′/δ′ precipitates are equally developed, the alloy may achieve optimized properties. The T1-precipitates and δ′/θ′/δ′ composite precipitates are the two primary strengthening precipitates and co-exist in the age-hardened 3rd generation AlLi alloys. The relative proportion of these two types of precipitates formed in the alloys is strongly dependent of the thermo-mechanical-treatment (TMT) processes applied. In the present study, using electron microscopy and properties characterization, the competitive precipitation behaviors of these two types of precipitates in an Al-4.0Cu-0.9Li-0.2Mg (wt.%) alloy, and the property of the alloy were investigated systematically in relation to TMT processes employed. It is shown that a 5% pre-deformation can promote the formation of T1 precipitates but depress the δ′/θ′/δ′ composite precipitates, which improves the strength but decreases the plasticity of the alloy significantly. A pre-natural-aging will promote the fine δ′/θ′/δ′ composite precipitates and T1 precipitates to form uniformly during subsequent artificial aging, improving the strength while maintaining good plasticity. A pre-artificial-aging at 180 °C will depress the formation of T1 precipitates, and greatly reduce the plasticity of the alloy. Our study indicates that when the T1 and the δ′/θ′/δ′ precipitates are equally developed, the alloy may achieve optimized properties. Wang, Qi oth Chen, Jianghua oth Wu, Cuilan oth Enthalten in Science Direct Shuker, David M. ELSEVIER Genotype-by-environment interactions and sexual selection 2015 an international journal on materials structure and behavior New York, NY (DE-627)ELV018863809 volume:176 year:2021 pages:0 https://doi.org/10.1016/j.matchar.2021.111123 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U GBV_ILN_22 GBV_ILN_40 52.56 Regenerative Energieformen alternative Energieformen VZ AR 176 2021 0 |
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10.1016/j.matchar.2021.111123 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001395.pica (DE-627)ELV054058287 (ELSEVIER)S1044-5803(21)00253-9 DE-627 ger DE-627 rakwb eng 150 VZ 620 VZ 52.56 bkl Li, Shiyong verfasserin aut The effect of thermo-mechanical treatment on the formation of T1 phase and δ′/θ′/δ′ composite precipitate in an Al-Cu-Li-Mg alloy 2021transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The T1-precipitates and δ′/θ′/δ′ composite precipitates are the two primary strengthening precipitates and co-exist in the age-hardened 3rd generation AlLi alloys. The relative proportion of these two types of precipitates formed in the alloys is strongly dependent of the thermo-mechanical-treatment (TMT) processes applied. In the present study, using electron microscopy and properties characterization, the competitive precipitation behaviors of these two types of precipitates in an Al-4.0Cu-0.9Li-0.2Mg (wt.%) alloy, and the property of the alloy were investigated systematically in relation to TMT processes employed. It is shown that a 5% pre-deformation can promote the formation of T1 precipitates but depress the δ′/θ′/δ′ composite precipitates, which improves the strength but decreases the plasticity of the alloy significantly. A pre-natural-aging will promote the fine δ′/θ′/δ′ composite precipitates and T1 precipitates to form uniformly during subsequent artificial aging, improving the strength while maintaining good plasticity. A pre-artificial-aging at 180 °C will depress the formation of T1 precipitates, and greatly reduce the plasticity of the alloy. Our study indicates that when the T1 and the δ′/θ′/δ′ precipitates are equally developed, the alloy may achieve optimized properties. The T1-precipitates and δ′/θ′/δ′ composite precipitates are the two primary strengthening precipitates and co-exist in the age-hardened 3rd generation AlLi alloys. The relative proportion of these two types of precipitates formed in the alloys is strongly dependent of the thermo-mechanical-treatment (TMT) processes applied. In the present study, using electron microscopy and properties characterization, the competitive precipitation behaviors of these two types of precipitates in an Al-4.0Cu-0.9Li-0.2Mg (wt.%) alloy, and the property of the alloy were investigated systematically in relation to TMT processes employed. It is shown that a 5% pre-deformation can promote the formation of T1 precipitates but depress the δ′/θ′/δ′ composite precipitates, which improves the strength but decreases the plasticity of the alloy significantly. A pre-natural-aging will promote the fine δ′/θ′/δ′ composite precipitates and T1 precipitates to form uniformly during subsequent artificial aging, improving the strength while maintaining good plasticity. A pre-artificial-aging at 180 °C will depress the formation of T1 precipitates, and greatly reduce the plasticity of the alloy. Our study indicates that when the T1 and the δ′/θ′/δ′ precipitates are equally developed, the alloy may achieve optimized properties. Wang, Qi oth Chen, Jianghua oth Wu, Cuilan oth Enthalten in Science Direct Shuker, David M. ELSEVIER Genotype-by-environment interactions and sexual selection 2015 an international journal on materials structure and behavior New York, NY (DE-627)ELV018863809 volume:176 year:2021 pages:0 https://doi.org/10.1016/j.matchar.2021.111123 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U GBV_ILN_22 GBV_ILN_40 52.56 Regenerative Energieformen alternative Energieformen VZ AR 176 2021 0 |
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10.1016/j.matchar.2021.111123 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001395.pica (DE-627)ELV054058287 (ELSEVIER)S1044-5803(21)00253-9 DE-627 ger DE-627 rakwb eng 150 VZ 620 VZ 52.56 bkl Li, Shiyong verfasserin aut The effect of thermo-mechanical treatment on the formation of T1 phase and δ′/θ′/δ′ composite precipitate in an Al-Cu-Li-Mg alloy 2021transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The T1-precipitates and δ′/θ′/δ′ composite precipitates are the two primary strengthening precipitates and co-exist in the age-hardened 3rd generation AlLi alloys. The relative proportion of these two types of precipitates formed in the alloys is strongly dependent of the thermo-mechanical-treatment (TMT) processes applied. In the present study, using electron microscopy and properties characterization, the competitive precipitation behaviors of these two types of precipitates in an Al-4.0Cu-0.9Li-0.2Mg (wt.%) alloy, and the property of the alloy were investigated systematically in relation to TMT processes employed. It is shown that a 5% pre-deformation can promote the formation of T1 precipitates but depress the δ′/θ′/δ′ composite precipitates, which improves the strength but decreases the plasticity of the alloy significantly. A pre-natural-aging will promote the fine δ′/θ′/δ′ composite precipitates and T1 precipitates to form uniformly during subsequent artificial aging, improving the strength while maintaining good plasticity. A pre-artificial-aging at 180 °C will depress the formation of T1 precipitates, and greatly reduce the plasticity of the alloy. Our study indicates that when the T1 and the δ′/θ′/δ′ precipitates are equally developed, the alloy may achieve optimized properties. The T1-precipitates and δ′/θ′/δ′ composite precipitates are the two primary strengthening precipitates and co-exist in the age-hardened 3rd generation AlLi alloys. The relative proportion of these two types of precipitates formed in the alloys is strongly dependent of the thermo-mechanical-treatment (TMT) processes applied. In the present study, using electron microscopy and properties characterization, the competitive precipitation behaviors of these two types of precipitates in an Al-4.0Cu-0.9Li-0.2Mg (wt.%) alloy, and the property of the alloy were investigated systematically in relation to TMT processes employed. It is shown that a 5% pre-deformation can promote the formation of T1 precipitates but depress the δ′/θ′/δ′ composite precipitates, which improves the strength but decreases the plasticity of the alloy significantly. A pre-natural-aging will promote the fine δ′/θ′/δ′ composite precipitates and T1 precipitates to form uniformly during subsequent artificial aging, improving the strength while maintaining good plasticity. A pre-artificial-aging at 180 °C will depress the formation of T1 precipitates, and greatly reduce the plasticity of the alloy. Our study indicates that when the T1 and the δ′/θ′/δ′ precipitates are equally developed, the alloy may achieve optimized properties. Wang, Qi oth Chen, Jianghua oth Wu, Cuilan oth Enthalten in Science Direct Shuker, David M. ELSEVIER Genotype-by-environment interactions and sexual selection 2015 an international journal on materials structure and behavior New York, NY (DE-627)ELV018863809 volume:176 year:2021 pages:0 https://doi.org/10.1016/j.matchar.2021.111123 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U GBV_ILN_22 GBV_ILN_40 52.56 Regenerative Energieformen alternative Energieformen VZ AR 176 2021 0 |
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10.1016/j.matchar.2021.111123 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001395.pica (DE-627)ELV054058287 (ELSEVIER)S1044-5803(21)00253-9 DE-627 ger DE-627 rakwb eng 150 VZ 620 VZ 52.56 bkl Li, Shiyong verfasserin aut The effect of thermo-mechanical treatment on the formation of T1 phase and δ′/θ′/δ′ composite precipitate in an Al-Cu-Li-Mg alloy 2021transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The T1-precipitates and δ′/θ′/δ′ composite precipitates are the two primary strengthening precipitates and co-exist in the age-hardened 3rd generation AlLi alloys. The relative proportion of these two types of precipitates formed in the alloys is strongly dependent of the thermo-mechanical-treatment (TMT) processes applied. In the present study, using electron microscopy and properties characterization, the competitive precipitation behaviors of these two types of precipitates in an Al-4.0Cu-0.9Li-0.2Mg (wt.%) alloy, and the property of the alloy were investigated systematically in relation to TMT processes employed. It is shown that a 5% pre-deformation can promote the formation of T1 precipitates but depress the δ′/θ′/δ′ composite precipitates, which improves the strength but decreases the plasticity of the alloy significantly. A pre-natural-aging will promote the fine δ′/θ′/δ′ composite precipitates and T1 precipitates to form uniformly during subsequent artificial aging, improving the strength while maintaining good plasticity. A pre-artificial-aging at 180 °C will depress the formation of T1 precipitates, and greatly reduce the plasticity of the alloy. Our study indicates that when the T1 and the δ′/θ′/δ′ precipitates are equally developed, the alloy may achieve optimized properties. The T1-precipitates and δ′/θ′/δ′ composite precipitates are the two primary strengthening precipitates and co-exist in the age-hardened 3rd generation AlLi alloys. The relative proportion of these two types of precipitates formed in the alloys is strongly dependent of the thermo-mechanical-treatment (TMT) processes applied. In the present study, using electron microscopy and properties characterization, the competitive precipitation behaviors of these two types of precipitates in an Al-4.0Cu-0.9Li-0.2Mg (wt.%) alloy, and the property of the alloy were investigated systematically in relation to TMT processes employed. It is shown that a 5% pre-deformation can promote the formation of T1 precipitates but depress the δ′/θ′/δ′ composite precipitates, which improves the strength but decreases the plasticity of the alloy significantly. A pre-natural-aging will promote the fine δ′/θ′/δ′ composite precipitates and T1 precipitates to form uniformly during subsequent artificial aging, improving the strength while maintaining good plasticity. A pre-artificial-aging at 180 °C will depress the formation of T1 precipitates, and greatly reduce the plasticity of the alloy. Our study indicates that when the T1 and the δ′/θ′/δ′ precipitates are equally developed, the alloy may achieve optimized properties. Wang, Qi oth Chen, Jianghua oth Wu, Cuilan oth Enthalten in Science Direct Shuker, David M. ELSEVIER Genotype-by-environment interactions and sexual selection 2015 an international journal on materials structure and behavior New York, NY (DE-627)ELV018863809 volume:176 year:2021 pages:0 https://doi.org/10.1016/j.matchar.2021.111123 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U GBV_ILN_22 GBV_ILN_40 52.56 Regenerative Energieformen alternative Energieformen VZ AR 176 2021 0 |
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10.1016/j.matchar.2021.111123 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001395.pica (DE-627)ELV054058287 (ELSEVIER)S1044-5803(21)00253-9 DE-627 ger DE-627 rakwb eng 150 VZ 620 VZ 52.56 bkl Li, Shiyong verfasserin aut The effect of thermo-mechanical treatment on the formation of T1 phase and δ′/θ′/δ′ composite precipitate in an Al-Cu-Li-Mg alloy 2021transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The T1-precipitates and δ′/θ′/δ′ composite precipitates are the two primary strengthening precipitates and co-exist in the age-hardened 3rd generation AlLi alloys. The relative proportion of these two types of precipitates formed in the alloys is strongly dependent of the thermo-mechanical-treatment (TMT) processes applied. In the present study, using electron microscopy and properties characterization, the competitive precipitation behaviors of these two types of precipitates in an Al-4.0Cu-0.9Li-0.2Mg (wt.%) alloy, and the property of the alloy were investigated systematically in relation to TMT processes employed. It is shown that a 5% pre-deformation can promote the formation of T1 precipitates but depress the δ′/θ′/δ′ composite precipitates, which improves the strength but decreases the plasticity of the alloy significantly. A pre-natural-aging will promote the fine δ′/θ′/δ′ composite precipitates and T1 precipitates to form uniformly during subsequent artificial aging, improving the strength while maintaining good plasticity. A pre-artificial-aging at 180 °C will depress the formation of T1 precipitates, and greatly reduce the plasticity of the alloy. Our study indicates that when the T1 and the δ′/θ′/δ′ precipitates are equally developed, the alloy may achieve optimized properties. The T1-precipitates and δ′/θ′/δ′ composite precipitates are the two primary strengthening precipitates and co-exist in the age-hardened 3rd generation AlLi alloys. The relative proportion of these two types of precipitates formed in the alloys is strongly dependent of the thermo-mechanical-treatment (TMT) processes applied. In the present study, using electron microscopy and properties characterization, the competitive precipitation behaviors of these two types of precipitates in an Al-4.0Cu-0.9Li-0.2Mg (wt.%) alloy, and the property of the alloy were investigated systematically in relation to TMT processes employed. It is shown that a 5% pre-deformation can promote the formation of T1 precipitates but depress the δ′/θ′/δ′ composite precipitates, which improves the strength but decreases the plasticity of the alloy significantly. A pre-natural-aging will promote the fine δ′/θ′/δ′ composite precipitates and T1 precipitates to form uniformly during subsequent artificial aging, improving the strength while maintaining good plasticity. A pre-artificial-aging at 180 °C will depress the formation of T1 precipitates, and greatly reduce the plasticity of the alloy. Our study indicates that when the T1 and the δ′/θ′/δ′ precipitates are equally developed, the alloy may achieve optimized properties. Wang, Qi oth Chen, Jianghua oth Wu, Cuilan oth Enthalten in Science Direct Shuker, David M. ELSEVIER Genotype-by-environment interactions and sexual selection 2015 an international journal on materials structure and behavior New York, NY (DE-627)ELV018863809 volume:176 year:2021 pages:0 https://doi.org/10.1016/j.matchar.2021.111123 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U GBV_ILN_22 GBV_ILN_40 52.56 Regenerative Energieformen alternative Energieformen VZ AR 176 2021 0 |
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The relative proportion of these two types of precipitates formed in the alloys is strongly dependent of the thermo-mechanical-treatment (TMT) processes applied. In the present study, using electron microscopy and properties characterization, the competitive precipitation behaviors of these two types of precipitates in an Al-4.0Cu-0.9Li-0.2Mg (wt.%) alloy, and the property of the alloy were investigated systematically in relation to TMT processes employed. It is shown that a 5% pre-deformation can promote the formation of T1 precipitates but depress the δ′/θ′/δ′ composite precipitates, which improves the strength but decreases the plasticity of the alloy significantly. A pre-natural-aging will promote the fine δ′/θ′/δ′ composite precipitates and T1 precipitates to form uniformly during subsequent artificial aging, improving the strength while maintaining good plasticity. 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effect of thermo-mechanical treatment on the formation of t1 phase and δ′/θ′/δ′ composite precipitate in an al-cu-li-mg alloy |
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The effect of thermo-mechanical treatment on the formation of T1 phase and δ′/θ′/δ′ composite precipitate in an Al-Cu-Li-Mg alloy |
| abstract |
The T1-precipitates and δ′/θ′/δ′ composite precipitates are the two primary strengthening precipitates and co-exist in the age-hardened 3rd generation AlLi alloys. The relative proportion of these two types of precipitates formed in the alloys is strongly dependent of the thermo-mechanical-treatment (TMT) processes applied. In the present study, using electron microscopy and properties characterization, the competitive precipitation behaviors of these two types of precipitates in an Al-4.0Cu-0.9Li-0.2Mg (wt.%) alloy, and the property of the alloy were investigated systematically in relation to TMT processes employed. It is shown that a 5% pre-deformation can promote the formation of T1 precipitates but depress the δ′/θ′/δ′ composite precipitates, which improves the strength but decreases the plasticity of the alloy significantly. A pre-natural-aging will promote the fine δ′/θ′/δ′ composite precipitates and T1 precipitates to form uniformly during subsequent artificial aging, improving the strength while maintaining good plasticity. A pre-artificial-aging at 180 °C will depress the formation of T1 precipitates, and greatly reduce the plasticity of the alloy. Our study indicates that when the T1 and the δ′/θ′/δ′ precipitates are equally developed, the alloy may achieve optimized properties. |
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The T1-precipitates and δ′/θ′/δ′ composite precipitates are the two primary strengthening precipitates and co-exist in the age-hardened 3rd generation AlLi alloys. The relative proportion of these two types of precipitates formed in the alloys is strongly dependent of the thermo-mechanical-treatment (TMT) processes applied. In the present study, using electron microscopy and properties characterization, the competitive precipitation behaviors of these two types of precipitates in an Al-4.0Cu-0.9Li-0.2Mg (wt.%) alloy, and the property of the alloy were investigated systematically in relation to TMT processes employed. It is shown that a 5% pre-deformation can promote the formation of T1 precipitates but depress the δ′/θ′/δ′ composite precipitates, which improves the strength but decreases the plasticity of the alloy significantly. A pre-natural-aging will promote the fine δ′/θ′/δ′ composite precipitates and T1 precipitates to form uniformly during subsequent artificial aging, improving the strength while maintaining good plasticity. A pre-artificial-aging at 180 °C will depress the formation of T1 precipitates, and greatly reduce the plasticity of the alloy. Our study indicates that when the T1 and the δ′/θ′/δ′ precipitates are equally developed, the alloy may achieve optimized properties. |
| abstract_unstemmed |
The T1-precipitates and δ′/θ′/δ′ composite precipitates are the two primary strengthening precipitates and co-exist in the age-hardened 3rd generation AlLi alloys. The relative proportion of these two types of precipitates formed in the alloys is strongly dependent of the thermo-mechanical-treatment (TMT) processes applied. In the present study, using electron microscopy and properties characterization, the competitive precipitation behaviors of these two types of precipitates in an Al-4.0Cu-0.9Li-0.2Mg (wt.%) alloy, and the property of the alloy were investigated systematically in relation to TMT processes employed. It is shown that a 5% pre-deformation can promote the formation of T1 precipitates but depress the δ′/θ′/δ′ composite precipitates, which improves the strength but decreases the plasticity of the alloy significantly. A pre-natural-aging will promote the fine δ′/θ′/δ′ composite precipitates and T1 precipitates to form uniformly during subsequent artificial aging, improving the strength while maintaining good plasticity. A pre-artificial-aging at 180 °C will depress the formation of T1 precipitates, and greatly reduce the plasticity of the alloy. Our study indicates that when the T1 and the δ′/θ′/δ′ precipitates are equally developed, the alloy may achieve optimized properties. |
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The effect of thermo-mechanical treatment on the formation of T1 phase and δ′/θ′/δ′ composite precipitate in an Al-Cu-Li-Mg alloy |
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