Formation mechanisms of cyclic saturation dislocation patterns in 001 , 011 and (1)over-bar 1 1 copper single crystals

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	Formation mechanisms of cyclic saturation dislocation patterns in 001 , 011 and (1)over-bar 1 1 copper single crystals
	P. Li; S. X. Li; Z. G. Wang; Z. F. Zhang
	2010
发表期刊	Acta Materialia
ISSN	1359-6454
卷号	58 期号:9 页码:3281-3294
摘要	This work reveals the formation mechanisms of saturation dislocation patterns in three typical multiple-slip oriented [0 0 1], [0 1 1] and [(1) over bar 1 1] copper single crystals. Compared with the single-slip oriented copper single crystals, the three multiple-slip oriented ones show very different dislocation patterns. It was found that the dislocation patterns in cyclically saturated copper single crystals are the Labyrinth structure for [0 0 1], wall structure for [0 1 1] and cell structure for [(1) over bar 1 1] , respectively. Based on a two-phase structure consisting of persistent slip bands and veins for single-slip orientation, the formation mechanisms of the dislocation patterns in multiple-slip oriented crystals are proposed as follows: the formation of the complex dislocation patterns depends on the activating slip system. The easy operation of the critical secondary slip system will contribute to the formation of the Labyrinth structure. The activation of the coplanar secondary slip system will be beneficial to formation of the cell structure. If no secondary slip system is activated, the wall structure is more prone to appear. Finally, the intrinsic relationship between various dislocation patterns and face centered cubic crystal structure was established. (C) 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
部门归属	[li, p.; li, s. x.; wang, z. g.; zhang, z. f.] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china.;li, p (reprint author), chinese acad sci, shenyang natl lab mat sci, inst met res, 72 wenhua rd, shenyang 110016, peoples r china;pli@imr.ac.cn zhfzhang@imr.ac.cn
关键词	Orientation Effect Cyclic Deformation Copper Single Crystals Dislocation Patterns Electron Channeling Contrast Persistent Slip Bands Stress-strain Response Low-amplitude Fatigue Deformation-behavior Grain-boundaries Orientation Surface Localization Arrangements
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/31228
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	P. Li,S. X. Li,Z. G. Wang,et al. Formation mechanisms of cyclic saturation dislocation patterns in 001 , 011 and (1)over-bar 1 1 copper single crystals[J]. Acta Materialia,2010,58(9):3281-3294.
APA	P. Li,S. X. Li,Z. G. Wang,&Z. F. Zhang.(2010).Formation mechanisms of cyclic saturation dislocation patterns in 001 , 011 and (1)over-bar 1 1 copper single crystals.Acta Materialia,58(9),3281-3294.
MLA	P. Li,et al."Formation mechanisms of cyclic saturation dislocation patterns in 001 , 011 and (1)over-bar 1 1 copper single crystals".Acta Materialia 58.9(2010):3281-3294.