Fatigue crack growth behavior of a newly developed Ni-Co-base superalloy TMW-2 at elevated temperatures

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	Fatigue crack growth behavior of a newly developed Ni-Co-base superalloy TMW-2 at elevated temperatures
	Z. H. Zhong; Y. F. Gu; Y. Yuan; C. Y. Cui; T. Yokokawa; H. Harada
	2012
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	552 页码:464-471
摘要	Fatigue crack growth (FCG) rates of a new superalloy TMW-2 in air was studied by a fracture mechanics test method. Compact tension specimens were tested under load control with a triangular wave form to investigate the effects of temperature (400, 650, and 725 degrees C) and load ratio (0.05 and 0.5) on FCG rates. The results showed that the FCG rates increased significantly with increasing the temperature. Compared with the creep effects, the results showed that the degradation of mechanical properties and the oxidation assisted crack growth may dominate the FCG rates of TMW-2 at elevated temperatures. Load ratio had a little (at 400 degrees C) or moderate (at 650 and 725 degrees C) influence on the FCG rates, which increased as the load ratio increased. The load ratio effects were successfully accounted for by applying the Walker model. The fractographic observations showed that the fracture mode was transgranular at 400 degrees C and was mixed transgranular and intergranular at 650 and 725 degrees C. (c) 2012 Elsevier B.V. All rights reserved.
部门归属	[zhong, zhihong; gu, yuefeng] natl inst mat sci, high temp mat unit, tsukuba, ibaraki 3050047, japan. [yuan, yong; yokokawa, tadaharu; harada, hiroshi] natl inst mat sci, environm & energy mat div, tsukuba, ibaraki 3050047, japan. [cui, chuanyong] chinese 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; gu.yuefeng@nims.go.jp
关键词	Fatigue Crack Growth Ni-base Superalloys Temperature Effect Load Ratio Effect Nickel-based Superalloy Wave-form Creep Micromechanisms Frequency Oxidation Alloy Ratio
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/60517
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,Y. Yuan,et al. Fatigue crack growth behavior of a newly developed Ni-Co-base superalloy TMW-2 at elevated temperatures[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2012,552:464-471.
APA	Z. H. Zhong,Y. F. Gu,Y. Yuan,C. Y. Cui,T. Yokokawa,&H. Harada.(2012).Fatigue crack growth behavior of a newly developed Ni-Co-base superalloy TMW-2 at elevated temperatures.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,552,464-471.
MLA	Z. H. Zhong,et al."Fatigue crack growth behavior of a newly developed Ni-Co-base superalloy TMW-2 at elevated temperatures".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 552(2012):464-471.