The nature of the maximum microhardness and thickness of the gradient layer in surface-strengthened Cu-Al alloys

doi:10.1016/j.actamat.2021.117073

IMR OpenIR

	The nature of the maximum microhardness and thickness of the gradient layer in surface-strengthened Cu-Al alloys
	Ren, C. X.1,2; Wang, Q.1; Hou, J. P.1; Zhang, Z. J.1; Zhang, Z. F.1,2; Langdon, T. G.3
通讯作者	Wang, Q.(gmwang@imr.ac.cn) ; Zhang, Z. F.(zhfzhang@imr.ac.cn)
	2021-08-15
发表期刊	ACTA MATERIALIA
ISSN	1359-6454
卷号	215 页码:15
摘要	The presence of a gradient layer with an increased maximum microhardness and extended thickness is extremely attractive because it can enhance the service performances for surface-strengthened metallic materials. In this research, Cu-Al alloys with different Al contents and microstructures were processed by surface spinning strengthening (3S) and studies were conducted to examine the gradient microstructure and microhardness distributions of the 3S Cu-Al alloys. The experimental results show that each group of the 3S Cu-Al alloys having the same Al content has approximately the same maximum microhardness at the topmost surface layer and the maximum microhardness increases with an increase in the Al content. In addition, the thickness of the gradient layer in the 3S Cu-Al alloys increases with a decrease of yield strength and an increase in the work-hardening exponent, respectively. The relationship between the maximum microhardness and chemical composition which determines the Young's modulus and plastic deformation mode, and the relationship between the thickness of the gradient layer and the microstructure which governs the strength and work-hardening capacity, were both investigated. It is found that the maximum microhardness of the gradient layer depends mainly on the chemical composition; whereas the thickness of the gradient layer depends primarily on both the strength and work-hardening capacity which are closely related to the microstructure. By combining the compositional design and microstructure optimization of the materials, and improving the surface strengthening intensity, a gradient layer of the surface-strengthened materials with an enhanced maximum microhardness and an extended thickness may be achieved. (C) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
关键词	Cu-Al alloy Gradient layer Microhardness Microstructure Surface spinning strengthening Yield strength
资助者	National Natural Science Foundation of China (NSFC) ; KC Wong Education Foundation ; LiaoNing Revitalization Talents Program ; European Research Council
DOI	10.1016/j.actamat.2021.117073
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China (NSFC)[U1664253] ; KC Wong Education Foundation[GJTD-2020-09] ; LiaoNing Revitalization Talents Program[XLYC1808027] ; European Research Council[267464-SPDMETALS]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000684229400040
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：16[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/321006/159329
专题	中国科学院金属研究所
通讯作者	Wang, Q.; Zhang, Z. F.
作者单位	1.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Univ Southampton, Dept Mech Engn, Southampton SO17 1BJ, Hants, England
推荐引用方式 GB/T 7714	Ren, C. X.,Wang, Q.,Hou, J. P.,et al. The nature of the maximum microhardness and thickness of the gradient layer in surface-strengthened Cu-Al alloys[J]. ACTA MATERIALIA,2021,215:15.
APA	Ren, C. X.,Wang, Q.,Hou, J. P.,Zhang, Z. J.,Zhang, Z. F.,&Langdon, T. G..(2021).The nature of the maximum microhardness and thickness of the gradient layer in surface-strengthened Cu-Al alloys.ACTA MATERIALIA,215,15.
MLA	Ren, C. X.,et al."The nature of the maximum microhardness and thickness of the gradient layer in surface-strengthened Cu-Al alloys".ACTA MATERIALIA 215(2021):15.