Effects of Stacking Fault Energy on the Deformation Mechanisms and Mechanical Properties of Face-Centered Cubic Metals

doi:10.11900/0412.1961.2022.00548

IMR OpenIR

	Effects of Stacking Fault Energy on the Deformation Mechanisms and Mechanical Properties of Face-Centered Cubic Metals
	Zhang Zhefeng; Li Keqiang; Cai Tuo; Li Peng; Zhang Zhenjun; Liu Rui; Yang Jinbo; Zhang Peng
通讯作者	Zhang Zhefeng(zhfzhang@imr.ac.cn)
	2023-04-11
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	59 期号:4 页码:467-477
摘要	Stacking fault energy (SFE) can play a crucial role in plastic deformation and damage mechanisms of face-centered cubic (fcc) metals. This study mainly summarized the following results: (1) With the reduction of SFE, the slip mode of fcc metals gradually changes from a facile cross-slip wavy mode to a planar mode until deformation twinning occurs; (2) The concept of effective SFE is applied to investigate the variation of SFE with dislocation density in the fcc metals, with the increase in dislocation density, the effective SFE increases; (3) The reduction of SFE is not the only factor determining the formation of deformation twins in fcc metals. In terms of calculating the competition between simulated slipping and twinning using the first principles, the critical criterion for forming deformation twinning in fcc metals was established; (4) The fatigue dislocation configuration of high-, medium-, and low-SFE fcc metals were analyzed and the judgment conditions for forming regular persistent slip bands (PSBs) are proposed; (5) With the increase in Al content, the SFE of Cu-Al alloy decreases, resulting in a simultaneous increasing trend in the tensile strength and the uniform elongation due to the increasing planar slip degree; (6) The exponential strain-hardening model can accurately describe the tensile strain-hardening process of Cu-Al alloys. The quantitative relationship among yield strength, tensile strength, and uniform elongation of Cu-Al alloy with different alloy compositions and microstructure states was successfully predicted; (7) With the increase in Al content, the fatigue strength of Cu-Al alloy is improved. Increasing Al content at the same strain amplitude will enhance its low-cycle fatigue life. Based on the experimental results above, it is shown that the alloy composition affects the deformation and damage mechanisms, and the evolution process of microscopic defects (dislocations, twins) in fcc metals and alloys. Thus, it drastically affects the tensile and fatigue properties of the fcc metals and alloys. These results provide experimental evidence and a theoretical basis for improving the mechanical properties and service reliability of fcc metals and alloys via alloy designing.
关键词	face-centered cubic metal stacking fault energy slip twinning strength plasticity fatigue strength
资助者	National Natural Science Foundation of China
DOI	10.11900/0412.1961.2022.00548
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[52130002] ; National Natural Science Foundation of China[51901230]
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000980757300004
出版者	SCIENCE PRESS
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/177798
专题	中国科学院金属研究所
通讯作者	Zhang Zhefeng
作者单位	Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Zhang Zhefeng,Li Keqiang,Cai Tuo,et al. Effects of Stacking Fault Energy on the Deformation Mechanisms and Mechanical Properties of Face-Centered Cubic Metals[J]. ACTA METALLURGICA SINICA,2023,59(4):467-477.
APA	Zhang Zhefeng.,Li Keqiang.,Cai Tuo.,Li Peng.,Zhang Zhenjun.,...&Zhang Peng.(2023).Effects of Stacking Fault Energy on the Deformation Mechanisms and Mechanical Properties of Face-Centered Cubic Metals.ACTA METALLURGICA SINICA,59(4),467-477.
MLA	Zhang Zhefeng,et al."Effects of Stacking Fault Energy on the Deformation Mechanisms and Mechanical Properties of Face-Centered Cubic Metals".ACTA METALLURGICA SINICA 59.4(2023):467-477.