Fatigue crack growth characteristics of a new Ni-Co-base superalloy TMW-4M3: effects of temperature and load ratio

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	Fatigue crack growth characteristics of a new Ni-Co-base superalloy TMW-4M3: effects of temperature and load ratio
	Z. H. Zhong; Y. F. Gu; T. Osada; Y. Yuan; C. Y. Cui; T. Yokokawa; T. Tetsui; H. Harada
	2011
发表期刊	Journal of Materials Science
ISSN	0022-2461
卷号	46 期号:23 页码:7573-7581
摘要	The fatigue crack growth (FCG) behavior of a newly developed Ni-Co-base superalloy TMW-4M3 has been investigated in this study. Experiment was carried out in laboratory air with compact-tension specimen. The effects of temperature (400, 650, and 725 degrees C) and load ratio (0.05 and 0.5) on crack growth rate were studied in the Paris regime. The results revealed that the crack growth rate increased with increasing temperature under a given load ratio. The influence of load ratio on crack growth rate was pronounced, especially at higher temperature and low stress intensity factor range. Fractographic observations showed that fracture mode was transgranular at 400 degrees C, mixed transgranular and intergranular at 650 degrees C, and predominantly intergranular at 725 degrees C. The possible explanations for the crack growth behavior were discussed based on the degradation of mechanical properties and the oxidation assisted crack growth, as well as the crack closure effect. A comparison of FCG rate was also made between TMW-4M3 and the commercial superalloy U720Li.
部门归属	[zhong, zhihong; gu, yuefeng; osada, toshio; yuan, yong; yokokawa, tadaharu; tetsui, toshimitsu; harada, hiroshi] natl inst mat sci, high temp mat unit, tsukuba, ibaraki 3050047, japan. [cui, chuanyong] china acad sci, inst met res, shenyang 110016, peoples r china.;zhong, zh (reprint author), natl inst mat sci, high temp mat unit, 1-2-1 sengen, tsukuba, ibaraki 3050047, japan;zhong.zhihong@nims.go.jp
关键词	Nickel-based Superalloy Elevated-temperature Stress Ratio Wave-form Alloy 718 Behavior Creep Oxidation Micromechanisms Microstructure
URL	查看原文
WOS记录号	WOS:000295179700028
引用统计	被引频次：14[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/321006/30980
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Z. H. Zhong,Y. F. Gu,T. Osada,et al. Fatigue crack growth characteristics of a new Ni-Co-base superalloy TMW-4M3: effects of temperature and load ratio[J]. Journal of Materials Science,2011,46(23):7573-7581.
APA	Z. H. Zhong.,Y. F. Gu.,T. Osada.,Y. Yuan.,C. Y. Cui.,...&H. Harada.(2011).Fatigue crack growth characteristics of a new Ni-Co-base superalloy TMW-4M3: effects of temperature and load ratio.Journal of Materials Science,46(23),7573-7581.
MLA	Z. H. Zhong,et al."Fatigue crack growth characteristics of a new Ni-Co-base superalloy TMW-4M3: effects of temperature and load ratio".Journal of Materials Science 46.23(2011):7573-7581.