Plastic deformation inhomogeneity in a single crystal nickel-base superalloy

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	Plastic deformation inhomogeneity in a single crystal nickel-base superalloy
	X. Wu; J. H. Zhang; J. L. Liu; T. Jin; Y. B. Xu; Z. Q. Hu
	2002
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	325 期号:1-2 页码:478-483
摘要	Extension and compression tests at different temperatures with various strain rates have been carried out on DD8 single crystal superalloys with [0 0 1] [1 1 0] and [1 1 1] orientations. The results show that plastic deformation heterogeneity (P-L effect) occurs in the temperature range from 300 to 700 degreesC at the strain rate of 3.3 x 10(-4) S-1 and also in the strain rate range of 1.3 x 10(-4)-5.3 x 10(-4) S-1 at 700 degreesC for the [0 0 1]-oriented single crystal nickel-base superalloy during extension. The dependence of the plastic deformation inhomogeneity on the crystallographic orientations during compression under the strain rate of 1.0 x 10(-4) S-1 at 550 degreesC were investigated, and the results indicate that the tendency to the plastic deformation inhomogeneity decreases in the order of [0 1 1], [0 0 1] and [1 1 1]. The mechanical tests display that this plastic instability may lead to the catastrophic drop in yield strength of the alloys, but can be removed by a new heat treatment, with which the yield strength can be improved. (C) 2002 Elsevier Science B.V. All rights reserved.
部门归属	wayne state univ, dept mech engn, detroit, mi 48202 usa. chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;wu, x (reprint author), wayne state univ, dept mech engn, detroit, mi 48202 usa;xwu@eng.wayne.edu
关键词	Dislocations Deformation Inhomogeneity Stress-strain Behaviors Single Crystal Superalloy
URL	查看原文
WOS记录号	WOS:000174080600057
引用统计	被引频次：16[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/321006/36461
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	X. Wu,J. H. Zhang,J. L. Liu,et al. Plastic deformation inhomogeneity in a single crystal nickel-base superalloy[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2002,325(1-2):478-483.
APA	X. Wu,J. H. Zhang,J. L. Liu,T. Jin,Y. B. Xu,&Z. Q. Hu.(2002).Plastic deformation inhomogeneity in a single crystal nickel-base superalloy.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,325(1-2),478-483.
MLA	X. Wu,et al."Plastic deformation inhomogeneity in a single crystal nickel-base superalloy".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 325.1-2(2002):478-483.