HIGH-CYCLE FATIGUE BEHAVIOR OF AM3 NICKEL-BASE SINGLE CRYSTAL SUPERALLOY AT HIGH TEMPERATURE

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	HIGH-CYCLE FATIGUE BEHAVIOR OF AM3 NICKEL-BASE SINGLE CRYSTAL SUPERALLOY AT HIGH TEMPERATURE
	L. Shui; T. Jin; X. F. Sun; Z. Q. Hu
	2010
发表期刊	International Journal of Modern Physics B
ISSN	0217-9792
卷号	24 期号:15-16 页码:2886-2891
摘要	A single crystal nickel-base superalloy with < 001 > orientation was subjected to high cycle fatigue loading at temperature of 700 degrees C and 870 degrees C. The tests were performed in ambient atmosphere under load control at a stress ratio R=sigma(min)/sigma(max)=0.1 and a frequency of 83.3 Hz on smooth specimens. In this paper, the premature initiation and rapid propagation of cracks to failure due to high frequency cyclic loading were explored. The dislocation characteristics and fracture surface observation were evaluated through scanning electron microscopy and transmission electron microscopy, respectively. The results showed that the fatigue strength at 700 degrees C was higher than that at 870 degrees C. At 700 degrees C the interaction of cyclic stress with high temperature induced the precipitation of homogeneous hyperfine secondary gamma' particles, that is beneficial to fatigue strength. At 870 degrees C, the cyclic stress led to the formation of persistent slip bands moving through the gamma matrix channels and the gamma' precipitates. The morphology change of gamma' phase was not notable during the deformation at high frequency cyclic loading.
部门归属	[shui, l.; jin, t.; sun, x. f.; hu, z. q.] chinese acad sci, inst met res, dept superalloy, shenyang 110016, peoples r china.;shui, l (reprint author), chinese acad sci, inst met res, dept superalloy, 72 wenhua rd, shenyang 110016, peoples r china;dcbsy@yahoo.com.cn
关键词	Nickel-base Single Crystal Superalloy High Cycle Fatigue Fracture Microstructure Creep Dislocations Tms-138
URL	查看原文
WOS记录号	WOS:000282197000110
引用统计	被引频次：5[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/321006/31440
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	L. Shui,T. Jin,X. F. Sun,et al. HIGH-CYCLE FATIGUE BEHAVIOR OF AM3 NICKEL-BASE SINGLE CRYSTAL SUPERALLOY AT HIGH TEMPERATURE[J]. International Journal of Modern Physics B,2010,24(15-16):2886-2891.
APA	L. Shui,T. Jin,X. F. Sun,&Z. Q. Hu.(2010).HIGH-CYCLE FATIGUE BEHAVIOR OF AM3 NICKEL-BASE SINGLE CRYSTAL SUPERALLOY AT HIGH TEMPERATURE.International Journal of Modern Physics B,24(15-16),2886-2891.
MLA	L. Shui,et al."HIGH-CYCLE FATIGUE BEHAVIOR OF AM3 NICKEL-BASE SINGLE CRYSTAL SUPERALLOY AT HIGH TEMPERATURE".International Journal of Modern Physics B 24.15-16(2010):2886-2891.