Thermally stable nanostructured Al-Mg alloy with relaxed grain boundaries

doi:10.1016/j.actamat.2022.117640

IMR OpenIR

	Thermally stable nanostructured Al-Mg alloy with relaxed grain boundaries
	Xu, W.; Zhang, B.; Du, K.; Li, X. Y.; Lu, K.
通讯作者	Li, X. Y.(xyli@imr.ac.cn)
	2022-03-01
发表期刊	ACTA MATERIALIA
ISSN	1359-6454
卷号	226 页码:10
摘要	Grain refinement into the nanoscale greatly hardens metals and alloys but reduces the stability. By means of cryogenic plastic deformation at very high strain rates, a high proportion of relaxed grain boundaries (GBs) were generated in an Al-5Mg alloy through emitting partial dislocations from GBs when grain sizes are below a critical value. The nanostructured Al-5Mg alloy with an average grain size of 31 nm exhibited a high hardness of 2.67 GPa and a grain coarsening temperature of about 95 K higher than that of submicro-grains. In addition, Mg depletion rather than segregation at some relaxed GBs was observed, that is in account with considerable compressive strains in the vicinity of the relaxed sigma 9 GB. The re-laxed GBs with Mg depletion are effective in stabilizing the nanostructured Al-Mg alloys. It offers a novel approach to developing stable nanostructured alloys. (C) 2022 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
关键词	Nanograined structure Al -Mg alloy Thermal stability Grain boundary relaxation Grain boundary depletion
资助者	National Natural Science Foundation of China ; Ministry of Science and Technology of the People's Republic of China ; Chinese Academy of Sciences
DOI	10.1016/j.actamat.2022.117640
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[52171088] ; Ministry of Science and Technology of the People's Republic of China[2017YFA0204401] ; Ministry of Science and Technology of the People's Republic of China[2017YFA0700700] ; Chinese Academy of Sciences[zdyz201701]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000799056700003
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：55[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/174096
专题	中国科学院金属研究所
通讯作者	Li, X. Y.
作者单位	Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Xu, W.,Zhang, B.,Du, K.,et al. Thermally stable nanostructured Al-Mg alloy with relaxed grain boundaries[J]. ACTA MATERIALIA,2022,226:10.
APA	Xu, W.,Zhang, B.,Du, K.,Li, X. Y.,&Lu, K..(2022).Thermally stable nanostructured Al-Mg alloy with relaxed grain boundaries.ACTA MATERIALIA,226,10.
MLA	Xu, W.,et al."Thermally stable nanostructured Al-Mg alloy with relaxed grain boundaries".ACTA MATERIALIA 226(2022):10.