Physical origin of surface slip morphologies induced by regular self-organized dislocation patterns in fatigued copper single crystals

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	Physical origin of surface slip morphologies induced by regular self-organized dislocation patterns in fatigued copper single crystals
	P. Li; Z. F. Zhang
	2014
发表期刊	Journal of Applied Physics
ISSN	0021-8979
卷号	115 期号:3
摘要	In this study, the formation mechanisms of typical dislocation patterns in fatigued copper single crystals were systematically investigated and summarized. The formation of persistent slip band (PSB) ladders depends on the width of extended dislocation and the trap distance of dipole. When the actual capture distance d(trap) is less than the critical capture distance d(critical), a group of relatively stable multipoles are obtained from many dipole segments, followed by the formation of the veins and PSB-ladder structures. Further evolution will bring about more and more ladder-like PSBs appearing in one local zone until 100% PSB, which is corresponding to the formation of developing deformation bands (DBs), and then the developing DBs will be converted into the well-developed DBs by merging ladder-like PSBs. After the secondary fatigue, the veins, PSB ladders, or walls can be regarded as the nucleation source of new slip bands (SBs). No matter how the surface slip morphologies change, the evolution of dislocation patterns always keeps the dynamic equilibrium and essentially reflects the constant deepening of strain localization. (C) 2014 AIP Publishing LLC.
部门归属	[li, p. ; zhang, z. f.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. ; li, p (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china. ; pli@imr.ac.cn
关键词	Cyclic Deformation-behavior Stress-strain Response Low-amplitude Fatigue Stereographic Triangle Bands Orientation Evolution Interior Side
URL	查看原文
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/72486
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	P. Li,Z. F. Zhang. Physical origin of surface slip morphologies induced by regular self-organized dislocation patterns in fatigued copper single crystals[J]. Journal of Applied Physics,2014,115(3).
APA	P. Li,&Z. F. Zhang.(2014).Physical origin of surface slip morphologies induced by regular self-organized dislocation patterns in fatigued copper single crystals.Journal of Applied Physics,115(3).
MLA	P. Li,et al."Physical origin of surface slip morphologies induced by regular self-organized dislocation patterns in fatigued copper single crystals".Journal of Applied Physics 115.3(2014).