Mechanical properties and deformation behaviours of submicron-sized Cu-Al single crystals

doi:10.1016/j.actamat.2021.117460

IMR OpenIR

	Mechanical properties and deformation behaviours of submicron-sized Cu-Al single crystals
	Niu, Ranming 1; An, Xianghai 1; Li, Linlin 2,3; Zhang, Zhefeng 2; Mai, Yiu-Wing 1; Liao, Xiaozhou 1
通讯作者	An, Xianghai(xianghai.an@sydney.edu.au) ; Liao, Xiaozhou(xiaozhou.liao@sydney.edu.au)
	2022-01-15
发表期刊	ACTA MATERIALIA
ISSN	1359-6454
卷号	223 页码:13
摘要	Tuning stacking fault energy (SFE) via alloying provides a robust protocol to manipulate deformation mechanism and consequently the mechanical properties of metallic materials. Mechanical behaviours of materials with small dimensions have received significant attention due to the increasing requirement of the miniaturisation and the development of micro-electromechanical smart systems. However, the effects of SFE on the size-dependent plasticity have rarely been studied. Herein, we employed quantitative in-situ compression transmission electron microscopy to systematically uncover the size effects on the mechanical properties and deformation mechanisms of submicron-sized Cu-Al single-crystalline pillars. The SFE was controlled by adjusting the Al content in Cu-Al alloys. Our research found that the sample size effect on strength apparently decreased with reducing SFE or increasing Al content. A theoretical model was proposed to capture the size dependency of the strength by incorporating the effect of SFE on dislocation sources. Size-dependent work-hardening behaviour and deformation mechanism were comprehensively explored, which were controlled by the interplay among sample size, SFE and alloying induced short-range ordering. Lastly, a deformation map was constructed for submicron-sized Cu-Al alloys, which is directly correlated with mechanical properties . (c) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
关键词	Size effect Stacking fault energy Short-range ordering Mechanical properties Deformation twinning
资助者	China Scholarship Council ; Australian Research Council ; Robinson Fellowship Scheme of the University of Sydney
DOI	10.1016/j.actamat.2021.117460
收录类别	SCI
语种	英语
资助项目	China Scholarship Council[201506840096] ; Australian Research Council[DE170100053] ; Australian Research Council[DP190102243] ; Robinson Fellowship Scheme of the University of Sydney[G200726]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000721999900006
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：46[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/321006/167475
专题	中国科学院金属研究所
通讯作者	An, Xianghai; Liao, Xiaozhou
作者单位	1.Univ Sydney, Sch Aerosp Mech & Mechatron Engn, Sydney, NSW 2006, Australia 2.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China 3.Northeastern Univ, State Key Lab Rolling & Automat, Shenyang 110819, Peoples R China
推荐引用方式 GB/T 7714	Niu, Ranming,An, Xianghai,Li, Linlin,et al. Mechanical properties and deformation behaviours of submicron-sized Cu-Al single crystals[J]. ACTA MATERIALIA,2022,223:13.
APA	Niu, Ranming,An, Xianghai,Li, Linlin,Zhang, Zhefeng,Mai, Yiu-Wing,&Liao, Xiaozhou.(2022).Mechanical properties and deformation behaviours of submicron-sized Cu-Al single crystals.ACTA MATERIALIA,223,13.
MLA	Niu, Ranming,et al."Mechanical properties and deformation behaviours of submicron-sized Cu-Al single crystals".ACTA MATERIALIA 223(2022):13.