Evaluation of Fatigue Properties of CA6NM Martensite Stainless Steel Using Miniature Specimens

doi:10.11900/0412.1961.2018.00023

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	Evaluation of Fatigue Properties of CA6NM Martensite Stainless Steel Using Miniature Specimens
	Ma Yefei 1,2; Song Zhuman 2; Zhang Siqian 1; Chen Lijia 1; Zhang Guangping 2
刊名	ACTA METALLURGICA SINICA
	2018-10-11
卷号	54 期号:10 页码:1359-1367
关键词	martensite stainless steel fatigue property miniature specimen size effect nuclear power material
ISSN号	0412-1961
DOI	10.11900/0412.1961.2018.00023
通讯作者	Zhang Guangping(gpzhang@imr.ac.cn)
英文摘要	Since structural components in the nuclear power plant are unable to be disassembled during their in service process, it is an urgent and key problem how to quickly and non-destructively evaluate fatigue reliability of these key structural components by using miniature specimens. Fatigue properties of miniature specimens of CA6NM martensite stainless steel for impellers in the nuclear pump were obtained by using symmetrically bending fatigue loading and uniaxial tension-tension fatigue loading, respectively. A comparison of fatigue properties between the miniature specimens and bulk specimens was conducted to examine feasibility for the evaluation of fatigue reliability of the CA6NM steel using miniature specimens. The results show that tensile strength of the 40 mu m-thick CA6NM specimens is slightly higher than that of the bulk specimens, but elongation of the 40 mu m-thick specimens is lower than that of the bulk counterparts. In low cycle fatigue regime, fatigue strength of the 40 mu m-thick specimens subjected to uniaxial tension-tension fatigue loading is lower than that of the standard bulk counterparts. With decreasing the applied stress amplitude, the difference in fatigue properties gradually decreases, and the fatigue limit of the miniature specimen is close to that of the bulk counterparts. Fatigue strength of the 40 mu m-thick specimens subjected to bending fatigue loading is much higher than that subjected to uniaxial tension-tension fatigue loading, and also higher than that of the bulk counterparts. Fatigue strength of the miniature specimens is related to the loading mode. The difference in the fatigue mechanism between the miniature specimens and the bulk counterparts is discussed, and the feasibility to evaluate fatigue reliability of the steel using miniature specimens is addressed.
资助项目	National Natural Science Foundation of China[51771207] ; National Natural Science Foundation of China[51501117]
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000446009000003
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/129629]
专题	金属研究所_中国科学院金属研究所
通讯作者	Zhang Guangping
作者单位	1.Shenyang Univ Technol, Sch Mat Sci & Engn, Shenyang 110870, Liaoning, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Ma Yefei,Song Zhuman,Zhang Siqian,et al. Evaluation of Fatigue Properties of CA6NM Martensite Stainless Steel Using Miniature Specimens[J]. ACTA METALLURGICA SINICA,2018,54(10):1359-1367.
APA	Ma Yefei,Song Zhuman,Zhang Siqian,Chen Lijia,&Zhang Guangping.(2018).Evaluation of Fatigue Properties of CA6NM Martensite Stainless Steel Using Miniature Specimens.ACTA METALLURGICA SINICA,54(10),1359-1367.
MLA	Ma Yefei,et al."Evaluation of Fatigue Properties of CA6NM Martensite Stainless Steel Using Miniature Specimens".ACTA METALLURGICA SINICA 54.10(2018):1359-1367.