Comparison of low-cycle fatigue behaviors between two nickel-based single-crystal superalloys

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	Comparison of low-cycle fatigue behaviors between two nickel-based single-crystal superalloys
	P. Li; Q. Q. Li; T. Jin; Y. Z. Zhou; J. G. Li; X. F. Sun; Z. F. Zhang
	2014
发表期刊	International Journal of Fatigue
ISSN	0142-1123
卷号	63 页码:137-144
摘要	The deformation mechanisms of nickel-base single-crystal superalloys containing 3 wt.% Re (3Re) and without Re (0Re) were systematically investigated in the temperature range from room temperature to 900 degrees C. At all testing temperatures, the alloy 3Re showed higher stress amplitudes and longer fatigue lives. With increasing temperature, slip mode gradually changes from planar to wavy slip. Dislocation climb and cross-slip, even by-passing became dominant deformation mechanisms of the two alloys and the addition of Re further reinforced this trend. In this process, the deformation homogenization became dominant, which resulted in the transition of cracking mode from shear fracture to normal fracture. At low temperature the specimen eventually cracks along the slip bands by shear, but at high temperature the specimen cracks by normal and shows mode I cracking. (C) 2014 Elsevier Ltd. All rights reserved.
部门归属	[li, p. ; li, q. q. ; zhang, z. f.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [li, q. q. ; jin, t. ; zhou, y. z. ; li, j. g. ; sun, x. f.] chinese acad sci, inst met res, superalloy div, 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 ; tjin@imr.ac.cn
关键词	Nickel-based Superalloy High Temperature Low-cycle Fatigue (Lcf) Slip Character Cracking Mode Stress-strain Behavior Stacking-fault Energy Temperature-dependence Elevated-temperature Crack Initiation Room-temperature Propagation Waspaloy Alloys Growth
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/321006/72869
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	P. Li,Q. Q. Li,T. Jin,et al. Comparison of low-cycle fatigue behaviors between two nickel-based single-crystal superalloys[J]. International Journal of Fatigue,2014,63:137-144.
APA	P. Li.,Q. Q. Li.,T. Jin.,Y. Z. Zhou.,J. G. Li.,...&Z. F. Zhang.(2014).Comparison of low-cycle fatigue behaviors between two nickel-based single-crystal superalloys.International Journal of Fatigue,63,137-144.
MLA	P. Li,et al."Comparison of low-cycle fatigue behaviors between two nickel-based single-crystal superalloys".International Journal of Fatigue 63(2014):137-144.