Superplastic Deformation Mechanisms in Fine-Grained 2050 Al-Cu-Li Alloys
The deformation behavior and microstructural evolution of fine-grained 2050 alloys at elevated temperatures and slow strain rates were investigated. The results showed that significant dynamic anisotropic grain growth occurred at the primary stage of deformation. Insignificant dislocation activity,...
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doaj-22d056d1daf841fbb62098b8adc791ba2020-11-25T03:37:30ZengMDPI AGMaterials1996-19442020-06-01132705270510.3390/ma13122705Superplastic Deformation Mechanisms in Fine-Grained 2050 Al-Cu-Li AlloysHongping Li0Xiaodong Liu1Quan Sun2Lingying Ye3Xinming Zhang4School of Materials Science and Engineering, Central South University, Changsha 410083, ChinaSchool of Materials Science and Engineering, Central South University, Changsha 410083, ChinaSchool of Materials Science and Engineering, Central South University, Changsha 410083, ChinaSchool of Materials Science and Engineering, Central South University, Changsha 410083, ChinaSchool of Materials Science and Engineering, Central South University, Changsha 410083, ChinaThe deformation behavior and microstructural evolution of fine-grained 2050 alloys at elevated temperatures and slow strain rates were investigated. The results showed that significant dynamic anisotropic grain growth occurred at the primary stage of deformation. Insignificant dislocation activity, particle-free zones, and the complete progress of grain neighbor switching based on diffusion creep were observed during superplastic deformation. Quantitative calculation showed that diffusion creep was the dominant mechanism in the superplastic deformation process, and that grain boundary sliding was involved as a coordination mechanism. Surface studies indicated that the diffusional transport of materials was accomplished mostly through the grain boundary, and that the effect of the bulk diffusion was not significant.https://www.mdpi.com/1996-1944/13/12/2705Al-Cu-Li alloyssuperplasticitycreep diffusiongrain boundary slidingfocused ion beams |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Hongping Li Xiaodong Liu Quan Sun Lingying Ye Xinming Zhang |
spellingShingle |
Hongping Li Xiaodong Liu Quan Sun Lingying Ye Xinming Zhang Superplastic Deformation Mechanisms in Fine-Grained 2050 Al-Cu-Li Alloys Materials Al-Cu-Li alloys superplasticity creep diffusion grain boundary sliding focused ion beams |
author_facet |
Hongping Li Xiaodong Liu Quan Sun Lingying Ye Xinming Zhang |
author_sort |
Hongping Li |
title |
Superplastic Deformation Mechanisms in Fine-Grained 2050 Al-Cu-Li Alloys |
title_short |
Superplastic Deformation Mechanisms in Fine-Grained 2050 Al-Cu-Li Alloys |
title_full |
Superplastic Deformation Mechanisms in Fine-Grained 2050 Al-Cu-Li Alloys |
title_fullStr |
Superplastic Deformation Mechanisms in Fine-Grained 2050 Al-Cu-Li Alloys |
title_full_unstemmed |
Superplastic Deformation Mechanisms in Fine-Grained 2050 Al-Cu-Li Alloys |
title_sort |
superplastic deformation mechanisms in fine-grained 2050 al-cu-li alloys |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2020-06-01 |
description |
The deformation behavior and microstructural evolution of fine-grained 2050 alloys at elevated temperatures and slow strain rates were investigated. The results showed that significant dynamic anisotropic grain growth occurred at the primary stage of deformation. Insignificant dislocation activity, particle-free zones, and the complete progress of grain neighbor switching based on diffusion creep were observed during superplastic deformation. Quantitative calculation showed that diffusion creep was the dominant mechanism in the superplastic deformation process, and that grain boundary sliding was involved as a coordination mechanism. Surface studies indicated that the diffusional transport of materials was accomplished mostly through the grain boundary, and that the effect of the bulk diffusion was not significant. |
topic |
Al-Cu-Li alloys superplasticity creep diffusion grain boundary sliding focused ion beams |
url |
https://www.mdpi.com/1996-1944/13/12/2705 |
work_keys_str_mv |
AT hongpingli superplasticdeformationmechanismsinfinegrained2050alculialloys AT xiaodongliu superplasticdeformationmechanismsinfinegrained2050alculialloys AT quansun superplasticdeformationmechanismsinfinegrained2050alculialloys AT lingyingye superplasticdeformationmechanismsinfinegrained2050alculialloys AT xinmingzhang superplasticdeformationmechanismsinfinegrained2050alculialloys |
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1724545535995543552 |