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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; Yuan, C (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China.
2017-02-01
Source PublicationJOURNAL OF MATERIALS RESEARCH
ISSN0884-2914
Volume32Issue:3Pages:624-633
AbstractAs 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.
description.department[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
Subject AreaMaterials Science, Multidisciplinary
Funding OrganizationTechnical Support Division of Shenyang R & D Center for Advanced Materials
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/78301
Collection中国科学院金属研究所
Corresponding AuthorYuan, C (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China.
Recommended Citation
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.
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