IMR OpenIR
The creep deformation mechanisms of a newly designed nickel-base superalloy
Cui, LQ; Yu, JJ; Liu, JL; Jin, T; Sun, XF; Yu, JJ (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China.
2018-01-05
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
Volume710Pages:309-317
AbstractThe influences of applied stress (120-760 MPa) and temperature (700-1000 degrees C) on the creep deformation mechanisms of the newly developed nickel-base superalloy M951G have been studied. The dominant deformation mechanisms of M951G alloy after different creep tests were systematically investigated and the reasons for their transition were well discussed. A creep mechanism map at various creep conditions was summarized and the theoretical critical resolved shear stresses (CRSSs) of various creep mechanisms under different temperatures were also calculated. Results show that the CRSSs of different creep mechanisms display different dependencies of temperature and the favorable deformation mechanisms at different creep conditions are different. tau(ApB), tau(OB) and tau(CL) are decreased to varying degrees with the temperature increasing; on the contrary, there is a positive correlation between tau(SF) and temperature. At low temperature region, the favorable deformation mechanism is shearing of gamma' precipitates by stacking faults. However, it changes to antiphase boundaries (APBs) coupled dislocation pairs shearing in the gamma' precipitates and dislocation climbing in the gamma matrix channel at high temperatures. At intermediate temperatures, both stacking faults and APBs are observed owing to the alternate leading of the CRSSs for APBs and stacking faults shearing in gamma' precipitates.; The influences of applied stress (120-760 MPa) and temperature (700-1000 degrees C) on the creep deformation mechanisms of the newly developed nickel-base superalloy M951G have been studied. The dominant deformation mechanisms of M951G alloy after different creep tests were systematically investigated and the reasons for their transition were well discussed. A creep mechanism map at various creep conditions was summarized and the theoretical critical resolved shear stresses (CRSSs) of various creep mechanisms under different temperatures were also calculated. Results show that the CRSSs of different creep mechanisms display different dependencies of temperature and the favorable deformation mechanisms at different creep conditions are different. tau(ApB), tau(OB) and tau(CL) are decreased to varying degrees with the temperature increasing; on the contrary, there is a positive correlation between tau(SF) and temperature. At low temperature region, the favorable deformation mechanism is shearing of gamma' precipitates by stacking faults. However, it changes to antiphase boundaries (APBs) coupled dislocation pairs shearing in the gamma' precipitates and dislocation climbing in the gamma matrix channel at high temperatures. At intermediate temperatures, both stacking faults and APBs are observed owing to the alternate leading of the CRSSs for APBs and stacking faults shearing in gamma' precipitates.
description.department[cui, luqing ; yu, jinjiang ; liu, jinlai ; jin, tao ; sun, xiaofeng] chinese acad sci, inst met res, shenyang 110016, liaoning, peoples r china ; [cui, luqing] univ sci & technol china, sch mat sci & engn, hefei 230026, anhui, peoples r china
KeywordSingle-crystal Superalloy Superlattice Stacking-faults Low-stress Creep Gamma'-phase Intermediate Temperatures Dislocation-motion Behaviors Shearing Cmsx-4 Dependence
Subject AreaNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding OrganizationNational Natural Science Foundation of China [50931004, 51571196, 51771191]
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/79591
Collection中国科学院金属研究所
Corresponding AuthorYu, JJ (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China.
Recommended Citation
GB/T 7714
Cui, LQ,Yu, JJ,Liu, JL,et al. The creep deformation mechanisms of a newly designed nickel-base superalloy[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2018,710:309-317.
APA Cui, LQ,Yu, JJ,Liu, JL,Jin, T,Sun, XF,&Yu, JJ .(2018).The creep deformation mechanisms of a newly designed nickel-base superalloy.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,710,309-317.
MLA Cui, LQ,et al."The creep deformation mechanisms of a newly designed nickel-base superalloy".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 710(2018):309-317.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Cui, LQ]'s Articles
[Yu, JJ]'s Articles
[Liu, JL]'s Articles
Baidu academic
Similar articles in Baidu academic
[Cui, LQ]'s Articles
[Yu, JJ]'s Articles
[Liu, JL]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Cui, LQ]'s Articles
[Yu, JJ]'s Articles
[Liu, JL]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.