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

IMR OpenIR

	Creep properties of a powder metallurgy disk superalloy at 700 degrees C
	Dong, Kaixin; Yuan, Chao; Gao, Shuang; Jia, Chonglin; Guo, Jianting; Ge, Changchun; Yuan, C (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China.
	2017-02-01
发表期刊	JOURNAL OF MATERIALS RESEARCH
ISSN	0884-2914
卷号	32 期号:3 页码:624-633
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.; 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.
部门归属	[dong, kaixin ; yuan, chao ; gao, shuang ; guo, jianting] chinese acad sci, inst met res, shenyang 110016, peoples r china ; [jia, chonglin ; ge, changchun] univ sci & technol beijing, sch mat sci & engn, beijing 100083, peoples r china
学科领域	Materials Science, Multidisciplinary
资助者	Technical Support Division of Shenyang R & D Center for Advanced Materials
收录类别	SCI
语种	英语
WOS记录号	WOS:000397469600014
引用统计	被引频次：8[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/321006/78301
专题	中国科学院金属研究所
通讯作者	Yuan, C (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China.
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.,...&Yuan, C .(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.