Study of fatigue dislocation structures in [(2)over-bar33] coplanar double-slip-oriented copper single crystals using SEM electronic channelling contrast

doi:10.3139/146.101734

IMR OpenIR

	Study of fatigue dislocation structures in [(2)over-bar33] coplanar double-slip-oriented copper single crystals using SEM electronic channelling contrast
	Zhou, Yang 1; Li, Xiao-Wu 1,2; Yang, Rui-Qing 3
通讯作者	Li, Xiao-Wu(xwli@mail.neu.edu.cn)
	2008-09-01
发表期刊	INTERNATIONAL JOURNAL OF MATERIALS RESEARCH
ISSN	1862-5282
卷号	99 期号:9 页码:958-963
摘要	Dislocation structures in fatigued [(2) over bar 33] coplanar double-slip-oriented copper single crystals were studied using the electron channelling contrast technique in scanning electron microscopy, especially focusing on the observations of the microstructures of persistent slip bands and deformation bands. It was found that, at low plastic strain amplitudes (gamma(pl) <= 3.4 x 10(-4)), the dislocation structures of the [(2) over bar 33] copper single crystal comprise a majority of elongated veins and a few elongated cells along the primary slip plane (111). As gamma(pl), increases to 6.2 x 10(-4), a special persistent slip band structure consisting of irregular dislocation cells, rather than generally-observed ladders in single-slip crystals, was found to form, which is responsible for the occurrence of a quasi-plateau in the cyclic stress-strain curve of the [(2) over bar 33] crystal. When gamma(pl), <= 3.5 x 10(-3), different dislocation microstructures in deformation bands, such as wall-like features, dislocation walls, elongated cells and dense dislocation cells, were found in the cyclically saturated [(2) over bar 33] crystal. Effects of the crystallographic orientation, the applied plastic strain amplitude, the accumulated plastic strain and the strain localization in the crystal on the microstructure of deformation bands are summarized and discussed.
关键词	Copper single crystal Dislocation structure Cyclic deformation Coplanar double slip SEM-ECC technique
资助者	University, Ministry of Education ; Scientific Research Foundation for the Returned Overseas Chinese Scholars ; Northeastern University and State Education Ministry, P.R. China ; National Natural Science Foundation of China (NSFC)
DOI	10.3139/146.101734
收录类别	SCI
语种	英语
资助项目	University, Ministry of Education[NCET-07-0162] ; Scientific Research Foundation for the Returned Overseas Chinese Scholars ; Northeastern University and State Education Ministry, P.R. China ; National Natural Science Foundation of China (NSFC)[50671023] ; National Natural Science Foundation of China (NSFC)[50771029]
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000259966100005
出版者	CARL HANSER VERLAG
引用统计	被引频次：9[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/321006/92760
专题	中国科学院金属研究所
通讯作者	Li, Xiao-Wu
作者单位	1.NE Univ, Coll Sci, Inst Mat Phys & Chem, Shenyang 110004, Peoples R China 2.NE Univ, Key Lab Anisotropy & Texture Mat, Minist Educ, Shenyang, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang, Peoples R China
推荐引用方式 GB/T 7714	Zhou, Yang,Li, Xiao-Wu,Yang, Rui-Qing. Study of fatigue dislocation structures in [(2)over-bar33] coplanar double-slip-oriented copper single crystals using SEM electronic channelling contrast[J]. INTERNATIONAL JOURNAL OF MATERIALS RESEARCH,2008,99(9):958-963.
APA	Zhou, Yang,Li, Xiao-Wu,&Yang, Rui-Qing.(2008).Study of fatigue dislocation structures in [(2)over-bar33] coplanar double-slip-oriented copper single crystals using SEM electronic channelling contrast.INTERNATIONAL JOURNAL OF MATERIALS RESEARCH,99(9),958-963.
MLA	Zhou, Yang,et al."Study of fatigue dislocation structures in [(2)over-bar33] coplanar double-slip-oriented copper single crystals using SEM electronic channelling contrast".INTERNATIONAL JOURNAL OF MATERIALS RESEARCH 99.9(2008):958-963.