Fatigue and creep-fatigue behavior of a nickel-base superalloy at 850 degrees C

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	Fatigue and creep-fatigue behavior of a nickel-base superalloy at 850 degrees C
	L. J. Chen; G. Yao; J. F. Tian; Z. G. Wang; H. Y. Zhao
	1998
发表期刊	International Journal of Fatigue
ISSN	0142-1123
卷号	20 期号:7 页码:543-548
摘要	Fully reversed total strain-controlled low-cycle fatigue tests with continuously cycling, equal hold in tension and compression, hold in tension or in compression have been conducted at 850 degrees C in air to study fatigue and creep-fatigue behavior of nickel-base alloy GH4049. At higher strain amplitudes, the alloy exhibits cyclic strain hardening followed by softening while a stable cyclic stress response is shown at low strain amplitudes. A significant reduction in fatigue life is observed with hold time in compression or in both tension and compression. The influence of tensile hold on fatigue life is more complicated. The opposite mean stress develops during tensile and compressive hold tests. The degree of work hardening increases during cycling due to introduction of hold time. The SEM analysis of fracture surfaces shows that crack initiation and stage I growth is transgranular, but crack growth in stage II is intergranular. In addition, a linear damage summation method, comprising both creep and fatigue damage, is considered to provide a good correlation of measured life with predicted life. (C) 1998 Elsevier Science Ltd. All rights reserved.
部门归属	acad sinica, inst met res, state key lab fatigue & fracture mat, shenyang 110015, peoples r china.;chen, lj (reprint author), acad sinica, inst met res, state key lab fatigue & fracture mat, shenyang 110015, peoples r china
关键词	Low-cycle Fatigue Creep-fatigue Nickel-base Superalloy Life Prediction Low-cycle Fatigue High-temperature Fracture Damage Alloy
URL	查看原文
WOS记录号	WOS:000075214100007
引用统计	被引频次：26[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/321006/37638
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	L. J. Chen,G. Yao,J. F. Tian,et al. Fatigue and creep-fatigue behavior of a nickel-base superalloy at 850 degrees C[J]. International Journal of Fatigue,1998,20(7):543-548.
APA	L. J. Chen,G. Yao,J. F. Tian,Z. G. Wang,&H. Y. Zhao.(1998).Fatigue and creep-fatigue behavior of a nickel-base superalloy at 850 degrees C.International Journal of Fatigue,20(7),543-548.
MLA	L. J. Chen,et al."Fatigue and creep-fatigue behavior of a nickel-base superalloy at 850 degrees C".International Journal of Fatigue 20.7(1998):543-548.