Deformation behavior of Ni(3)Al single crystals during nanoindentation

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	Deformation behavior of Ni(3)Al single crystals during nanoindentation
	W. Wang; C. B. Jiang; K. Lu
	2003
发表期刊	Acta Materialia
ISSN	1359-6454
卷号	51 期号:20 页码:6169-6180
摘要	The deformation behavior of (1 1 1), (1 1 0) and (0 0 1) oriented Ni(3)Al single crystals was investigated by means of nanoindentation. Upon loading with the blunt and sharp indenter tips, the crystal deforms elastically in the initial stage followed by plastic deformation of which the onset is characterized by an obvious displacement burst (or pop-in) in the loading curve. This pop-in corresponds to homogeneous nucleation of dislocation loops under the indenter. When a sharp indenter tip was used, a major pop-in can be identified at a large load (similar to7 mN for (1 1 1) crystal) in the plastic regime on loading. The major pop-in may be correlated with the special dislocation structure of the K-W locks in the Ni(3)Al crystals that are formed during loading. The pop-in behavior during plastic deformation of Ni(3)Al crystals is found to be closely related to the crystal orientation, pre-existing dislocation density in the sample surface, loading rate, and holding (at a constant sub-critical load) time as well. Pop-ins were also observed at critical loads in unloading processes. (C) 2003 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
部门归属	chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;wang, w (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china;wei.wang@imr.ac.cn
关键词	Deformation Behavior Ni(3)Al Single crystAl Nanoindentation Pop-in Mechanical Deformation Incipient Plasticity Flow-stress Thin-films Indentation Surfaces
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WOS记录号	WOS:000187219700012
引用统计	被引频次：67[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/321006/36058
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	W. Wang,C. B. Jiang,K. Lu. Deformation behavior of Ni(3)Al single crystals during nanoindentation[J]. Acta Materialia,2003,51(20):6169-6180.
APA	W. Wang,C. B. Jiang,&K. Lu.(2003).Deformation behavior of Ni(3)Al single crystals during nanoindentation.Acta Materialia,51(20),6169-6180.
MLA	W. Wang,et al."Deformation behavior of Ni(3)Al single crystals during nanoindentation".Acta Materialia 51.20(2003):6169-6180.