IMR OpenIR
The creep deformation and fracture behaviors of nickel-base superalloy M951G at 900 degrees C
Cui, Luqing; Su, Huhu; Yu, Jinjiang; Liu, Jinlai; Jin, Tao; Sun, Xiaofeng; Yu, JJ (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China.
2017-11-07
Source PublicationELSEVIER SCIENCE SA
ISSN0921-5093
Volume707Pages:383-391
AbstractThe creep behaviors of M951G alloy were carried out under stress ranging from 240 MPa to 400 MPa at 900 degrees C, and the corresponding deformation mechanisms and fracture behaviors after rupture had been investigated by various techniques. Results showed that both the deformation mechanisms and fracture behaviors were dependent on the applied stress. According to the transmission electron microscope (TEM) observations, the dominant deformation mechanism changed from a combined process of slip and climb of dislocations in matrix channel to shearing of dislocations in gamma' precipitates and cross-slip of dislocations in matrix channel with the applied stress increasing. Fracture behaviors of M951G alloy were characterized using optical microscope (OM) and scanning electron microscope (SEM), which changed from intergranular to transgranular with the increase of applied stress. At low applied stress, M951G alloy was failure in the form of intergranular owing to coalescence of micropores along the grain boundaries. However, at higher applied stress the microcracks initiated at broken carbides in the grain interior, and finally resulted in transgranular fracture. Additionally, creep strain rate also played a key role in determining the transition of creep fracture modes by effect the corresponding temperature of equal strength for grain boundary and grain interior. The values of apparent stress exponent at low and high stress regions were calculated to be 5.14 and 11.13 respectively, which was due to the change of deformation mechanisms and fracture modes with the increase of applied stress.; The creep behaviors of M951G alloy were carried out under stress ranging from 240 MPa to 400 MPa at 900 degrees C, and the corresponding deformation mechanisms and fracture behaviors after rupture had been investigated by various techniques. Results showed that both the deformation mechanisms and fracture behaviors were dependent on the applied stress. According to the transmission electron microscope (TEM) observations, the dominant deformation mechanism changed from a combined process of slip and climb of dislocations in matrix channel to shearing of dislocations in gamma' precipitates and cross-slip of dislocations in matrix channel with the applied stress increasing. Fracture behaviors of M951G alloy were characterized using optical microscope (OM) and scanning electron microscope (SEM), which changed from intergranular to transgranular with the increase of applied stress. At low applied stress, M951G alloy was failure in the form of intergranular owing to coalescence of micropores along the grain boundaries. However, at higher applied stress the microcracks initiated at broken carbides in the grain interior, and finally resulted in transgranular fracture. Additionally, creep strain rate also played a key role in determining the transition of creep fracture modes by effect the corresponding temperature of equal strength for grain boundary and grain interior. The values of apparent stress exponent at low and high stress regions were calculated to be 5.14 and 11.13 respectively, which was due to the change of deformation mechanisms and fracture modes with the increase of applied stress.
description.department[cui, luqing ; su, huhu ; yu, jinjiang ; liu, jinlai ; jin, tao ; sun, xiaofeng] chinese acad sci, inst met res, shenyang 110016, liaoning, peoples r china ; [cui, luqing ; su, huhu] univ sci & technol china, sch mat sci & engn, hefei 230026, anhui, peoples r china
KeywordM951g Alloy Stress Level Creep Behavior Deformation Mechanism Creep Fracture Mode
Subject AreaNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding OrganizationNational Natural Science Foundation of China (NSFC) [50931004, 51771191, 51571196]
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/78983
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, Luqing,Su, Huhu,Yu, Jinjiang,et al. The creep deformation and fracture behaviors of nickel-base superalloy M951G at 900 degrees C[J]. ELSEVIER SCIENCE SA,2017,707:383-391.
APA Cui, Luqing.,Su, Huhu.,Yu, Jinjiang.,Liu, Jinlai.,Jin, Tao.,...&Yu, JJ .(2017).The creep deformation and fracture behaviors of nickel-base superalloy M951G at 900 degrees C.ELSEVIER SCIENCE SA,707,383-391.
MLA Cui, Luqing,et al."The creep deformation and fracture behaviors of nickel-base superalloy M951G at 900 degrees C".ELSEVIER SCIENCE SA 707(2017):383-391.
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, Luqing]'s Articles
[Su, Huhu]'s Articles
[Yu, Jinjiang]'s Articles
Baidu academic
Similar articles in Baidu academic
[Cui, Luqing]'s Articles
[Su, Huhu]'s Articles
[Yu, Jinjiang]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Cui, Luqing]'s Articles
[Su, Huhu]'s Articles
[Yu, Jinjiang]'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.