| FRACTURE MECHANISM OF PRE-DEFORMATION-AGED Al-2.73Li ALLOY |
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| 引用本文： | SUN Dongli YANG Dezhuang LEI Tingquan CUI Yuexian Harbin Institute of Technology,Harbin,China Lecturer,Department of Metallic Materials and Technology,Harbin Institute of Technology,Harbin 150006,China. FRACTURE MECHANISM OF PRE-DEFORMATION-AGED Al-2.73Li ALLOY[J]. 金属学报(英文版), 1990, 3(5): 357-363 |
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| 作者姓名： | SUN Dongli YANG Dezhuang LEI Tingquan CUI Yuexian Harbin Institute of Technology Harbin China Lecturer Department of Metallic Materials and Technology Harbin Institute of Technology Harbin 150006 China |
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| 作者单位： | SUN Dongli YANG Dezhuang LEI Tingquan CUI Yuexian Harbin Institute of Technology，Harbin，China Lecturer，Department of Metallic Materials and Technology，Harbin Institute of Technology，Harbin 150006，China |
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| 摘 要： | The fracture mechanism of deformation-aged Al-Li alloy was approached by investigatingthe influence of prior cold deformation on the precipitation kinetics as well as the behavioursof work hardening and fracture for Al-2.73Li alloy.The experimental results show that thework hardening rate and the strength are increased and the ductility is decreased by prior colddeformation.The decrease in ductility is mainly due to the cell dislocaton substructure distrib-uted inhomogeneously and the hardening of precipitate free zones at grain boundaries causedby prior cold deformation.The failure mode in the alloy is a mixed integranular andtransgranular one.The tendency of intergranular fracture is intensified through thedeformation-aging.The mechanisms of intergranular failure in the alloy are different undervarious deformation-aging treatments.
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| 收稿时间： | 1990-10-25 |
| 修稿时间： | 1990-10-25 |
FRACTURE MECHANISM OF PRE-DEFORMATION-AGED Al-2.73Li ALLOY |
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| SUN Dongli YANG Dezhuang LEI Tingquan CUI Yuexian Harbin Institute of Technology,Harbin,China Lecturer. FRACTURE MECHANISM OF PRE-DEFORMATION-AGED Al-2.73Li ALLOY[J]. Acta Metallurgica Sinica(English Letters), 1990, 3(5): 357-363 |
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| Authors: | SUN Dongli YANG Dezhuang LEI Tingquan CUI Yuexian Harbin Institute of Technology Harbin China Lecturer |
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| Affiliation: | SUN Dongli YANG Dezhuang LEI Tingquan CUI Yuexian Harbin Institute of Technology,Harbin,China Lecturer,Department of Metallic Materials and Technology,Harbin Institute of Technology,Harbin,China |
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| Abstract: | The fracture mechanism of deformation-aged Al-Li alloy was approached by investigating the influence of prior cold deformation on the precipitation kinetics as well as the behaviours of work hardening and fracture for Al-2.73Li alloy.The experimental results show that the work hardening rate and the strength are increased and the ductility is decreased by prior cold deformation.The decrease in ductility is mainly due to the cell dislocaton substructure distrib- uted inhomogeneously and the hardening of precipitate free zones at grain boundaries caused by prior cold deformation.The failure mode in the alloy is a mixed integranular and transgranular one.The tendency of intergranular fracture is intensified through the deformation-aging.The mechanisms of intergranular failure in the alloy are different under various deformation-aging treatments. |
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| Keywords: | Al-Li alloy deformation-aging precipitation strengthening fracture |
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