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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Main Authors:	Hongping Li, Xiaodong Liu, Quan Sun, Lingying Ye, Xinming Zhang
Format:	Article
Language:	English
Published:	MDPI AG 2020-06-01
Series:	Materials
Subjects:	Al-Cu-Li alloys superplasticity creep diffusion grain boundary sliding focused ion beams
Online Access:	https://www.mdpi.com/1996-1944/13/12/2705

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record_format	Article
spelling	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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Superplastic Deformation Mechanisms in Fine-Grained 2050 Al-Cu-Li Alloys

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