Evolutionary stress cycle behaviour and damage mechanisms in nickel based superalloy under thermomechanical fatigue

IMR OpenIR

	Evolutionary stress cycle behaviour and damage mechanisms in nickel based superalloy under thermomechanical fatigue; Evolutionary stress cycle behaviour and damage mechanisms in nickel based superalloy under thermomechanical fatigue
	F. Liu; Y. C. Wang; H. Zhang; S. H. Ai; Z. G. Wang
	2003 ; 2003
发表期刊	Materials Science and Technology ; Materials Science and Technology
ISSN	0267-0836 ; 0267-0836
卷号	19 期号:7 页码:853-858
摘要	Both in phase and out of phase thermomechanical fatigue (TMF) tests were conducted using a computer controlled, servohydraulic uniaxial fatigue system. The TMF behaviour of nickel based superalloy K417 was investigated. The experimental results show that, in comparison with isothermal low cycle fatigue, both in phase and out of phase TMF lead to much reduced fatigue lives, although there is a difference between the in phase and out of phase cases. Creep and oxidation are the main concerns in the lower fatigue life of in phase TMF. The cyclic hardening at initial cycles results from the obstacle of gamma' precipitates to the slipping dislocations and the increase in dislocation density owing to deformation. Shearing of gamma' precipitates and loss of coherency of gamma' precipitates with the matrix at high temperatures are the reasons for cyclic softening at later stages of fatigue life.; Both in phase and out of phase thermomechanical fatigue (TMF) tests were conducted using a computer controlled, servohydraulic uniaxial fatigue system. The TMF behaviour of nickel based superalloy K417 was investigated. The experimental results show that, in comparison with isothermal low cycle fatigue, both in phase and out of phase TMF lead to much reduced fatigue lives, although there is a difference between the in phase and out of phase cases. Creep and oxidation are the main concerns in the lower fatigue life of in phase TMF. The cyclic hardening at initial cycles results from the obstacle of gamma' precipitates to the slipping dislocations and the increase in dislocation density owing to deformation. Shearing of gamma' precipitates and loss of coherency of gamma' precipitates with the matrix at high temperatures are the reasons for cyclic softening at later stages of fatigue life.
部门归属	chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;liu, f (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china;drliu@hotmail.com ; chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;liu, f (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china;drliu@hotmail.com
关键词	High-temperature High-temperature Strain Response Strain Response Fracture Fracture Deformation Deformation
URL	查看原文 ; 查看原文
WOS记录号	WOS:000184340800003 ; WOS:000184340800003
引用统计	被引频次：10[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/321006/35914
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	F. Liu,Y. C. Wang,H. Zhang,et al. Evolutionary stress cycle behaviour and damage mechanisms in nickel based superalloy under thermomechanical fatigue, Evolutionary stress cycle behaviour and damage mechanisms in nickel based superalloy under thermomechanical fatigue[J]. Materials Science and Technology, Materials Science and Technology,2003, 2003,19, 19(7):853-858, 853-858.
APA	F. Liu,Y. C. Wang,H. Zhang,S. H. Ai,&Z. G. Wang.(2003).Evolutionary stress cycle behaviour and damage mechanisms in nickel based superalloy under thermomechanical fatigue.Materials Science and Technology,19(7),853-858.
MLA	F. Liu,et al."Evolutionary stress cycle behaviour and damage mechanisms in nickel based superalloy under thermomechanical fatigue".Materials Science and Technology 19.7(2003):853-858.