Creep properties of a powder metallurgy disk superalloy at 700 degrees C

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	Creep properties of a powder metallurgy disk superalloy at 700 degrees C
	Dong, Kaixin ; Yuan, Chao ; Gao, Shuang ; Jia, Chonglin ; Guo, Jianting ; Ge, Changchun
刊名	JOURNAL OF MATERIALS RESEARCH
	2017-02-01
卷号	32 期号:3 页码:624-633
ISSN号	0884-2914
通讯作者	Yuan, C (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China.
中文摘要	As the operating temperature of disk service was elevated from 650 degrees C to 700 degrees C, the creep properties urged to be paid attention. To investigate the creep properties of spray-formed low solvus, high refractory (LSHR) superalloy at about 700 degrees C, creep tests were conducted under seven different stress ranging from 690 MPa to 897 MPa. By means of creep curves and fracture microstructure observation, the creep behaviors and fracture mechanisms of spray-formed LSHR were analyzed. Stress exponent of the alloy was comparable to other disk superalloys such as Waspaloy and Inconel 718. It was interesting to find a transition in the creep behavior in two stress regimes. The contribution of grain boundary sliding in the low stress regime was greater than that in the higher stress. Under higher stress microcracks initiated along the intragranular slip bands because of strain concentration. The spray-forming LSHR exhibited a good creep resistance at low stress compared with other two superalloys by using Larson-Miller parameter, which was consistent with the transition of fracture behaviors.
学科主题	Materials Science, Multidisciplinary
收录类别	SCI
资助信息	Technical Support Division of Shenyang R & D Center for Advanced Materials
语种	英语
公开日期	2017-08-17
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/78301]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	Dong, Kaixin,Yuan, Chao,Gao, Shuang,et al. Creep properties of a powder metallurgy disk superalloy at 700 degrees C[J]. JOURNAL OF MATERIALS RESEARCH,2017,32(3):624-633.
APA	Dong, Kaixin,Yuan, Chao,Gao, Shuang,Jia, Chonglin,Guo, Jianting,&Ge, Changchun.(2017).Creep properties of a powder metallurgy disk superalloy at 700 degrees C.JOURNAL OF MATERIALS RESEARCH,32(3),624-633.
MLA	Dong, Kaixin,et al."Creep properties of a powder metallurgy disk superalloy at 700 degrees C".JOURNAL OF MATERIALS RESEARCH 32.3(2017):624-633.