Characterization of dislocation structures in (1)over-bar11 copper single crystals using electron channelling contrast technique in SEM

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	Characterization of dislocation structures in (1)over-bar11 copper single crystals using electron channelling contrast technique in SEM
	X. W. Li; Y. Zhou; W. W. Guo; G. P. Zhang
	2009
发表期刊	Crystal Research and Technology
ISSN	0232-1300
卷号	44 期号:3 页码:315-321
摘要	The dislocation structures induced by low-plastic-strain-amplitude cyclic deformation of [(1) over bar 11] multiple-slip-oriented Cu single crystals were investigated using electron channelling contrast (ECC) technique in scanning electron microscopy (SEM). At a low plastic strain amplitude gamma(pl) of 8.8 x 10(-5), the saturated dislocation structure is mainly composed of labyrinth-like vein structure (or irregular labyrinths), and the cyclic hardening behavior at such a low gamma(pl) is interpreted as being the result of dislocation multiplication by a Frank-Read mechanism. As gamma(pl) increases to 4.0 x 10(-4), the unsaturated dislocation structure exhibits two kinds of distinctive configurations, i.e., dislocation walls and misoriented cells. Interestingly, these misoriented dislocation cells are strictly aligned along the primary slip plane (111), constituting a unique persistent slip band (PSB) structure. Here, these cells are thus called PSB cells. In addition, there is a locally distinctive region comprising some cells having a recrystallization-like feature in the whole structure of PSB cells. The formation of the structure of PSB cells is discussed. (c) 2009 WILEY-VCH Verlag GmbH & Co. KGaA. Weinheim
部门归属	[li, xiao-wu; zhou, yang; guo, wei-wei] northeastern univ, inst mat phys & chem, coll sci, shenyang 110004, peoples r china. [li, xiao-wu] northeastern univ, key lab anisotropy & texture engn mat, minist educ, shenyang 110004, peoples r china. [zhang, guang-ping] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china.;li, xw (reprint author), northeastern univ, inst mat phys & chem, coll sci, pob 104,3-11 wenhua rd, shenyang 110004, peoples r china;xwli@mail.neu.edu.cn
关键词	Cu Single Crystal Dislocation Structure Multiple Slip Plastic Strain Amplitude Cyclic Deformation Sem-ecc Plastic Strain Amplitudes Persistent Slip Bands Conjugate Double-slip Cyclic Deformation Behavior Fatigue Stress Saturation Arrangements Dependence
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文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/32043
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	X. W. Li,Y. Zhou,W. W. Guo,et al. Characterization of dislocation structures in (1)over-bar11 copper single crystals using electron channelling contrast technique in SEM[J]. Crystal Research and Technology,2009,44(3):315-321.
APA	X. W. Li,Y. Zhou,W. W. Guo,&G. P. Zhang.(2009).Characterization of dislocation structures in (1)over-bar11 copper single crystals using electron channelling contrast technique in SEM.Crystal Research and Technology,44(3),315-321.
MLA	X. W. Li,et al."Characterization of dislocation structures in (1)over-bar11 copper single crystals using electron channelling contrast technique in SEM".Crystal Research and Technology 44.3(2009):315-321.