IMR OpenIR
Anisotropic Stress Rupture Properties of a 3rd-Generation Nickel-Based Single-Crystal Superalloy at 1100 °C/150 MPa
Li Yifei; Wang Li; Zhang Gong; Qi Dongqing; Du Kui; Lou Langhong
2020
Source PublicationActa Metallurgica Sinica(English Letters)
ISSN1006-7191
Volume33Issue:3Pages:446-458
AbstractThe influence of orientation on the stress rupture behaviors of a 3rd-generation nickel-based single-crystal superalloy was investigated at 1100 °C/150 MPa.It is found that the stress rupture anisotropy is shown at 1100 °C, but not so obvious compared with that at intermediate temperatures.The 001 specimens display the longest rupture life, 111 specimens show the shortest rupture life, and 011 specimens exhibit the intermediate life.Detailed observations show that the final fracture is caused by crack initiation and propagation, and the anisotropy of three oriented specimens is related to the fracture modes, γ / γ ? microstructures, interfacial dislocation networks and cutting mechanisms in γ ? phase.For 001 specimens,N -type rafted structures are formed which can well hinder the slip and climb of dislocations.Besides, the regular interfacial dislocation networks can prevent dislocations from cutting into γ ? phase, leading to the improvement of the creep resistance.For 011 specimens, ± 45° rafted structures and irregular networks result in less strain hardening.For 111 specimens, a large number of crack propagation paths and inhomogeneous deformations caused by irregular rafted structures deteriorate the property and result in the shortest life.Furthermore, a 100 superdislocations with low mobility are widely formed in 001 and 011 specimens which suggests the low creep strain rate during steady creep stage, whereas superdislocations in 111 specimens possess high mobility, which indicates the high strain rate and corresponding poor stress rupture property.
KeywordSingle-crystal superalloy Stress rupture Anisotropy Microstructure Dislocation
Indexed ByCSCD
Language英语
CSCD IDCSCD:6667168
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/152131
Collection中国科学院金属研究所
Affiliation中国科学院金属研究所
Recommended Citation
GB/T 7714
Li Yifei,Wang Li,Zhang Gong,et al. Anisotropic Stress Rupture Properties of a 3rd-Generation Nickel-Based Single-Crystal Superalloy at 1100 °C/150 MPa[J]. Acta Metallurgica Sinica(English Letters),2020,33(3):446-458.
APA Li Yifei,Wang Li,Zhang Gong,Qi Dongqing,Du Kui,&Lou Langhong.(2020).Anisotropic Stress Rupture Properties of a 3rd-Generation Nickel-Based Single-Crystal Superalloy at 1100 °C/150 MPa.Acta Metallurgica Sinica(English Letters),33(3),446-458.
MLA Li Yifei,et al."Anisotropic Stress Rupture Properties of a 3rd-Generation Nickel-Based Single-Crystal Superalloy at 1100 °C/150 MPa".Acta Metallurgica Sinica(English Letters) 33.3(2020):446-458.
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
[Li Yifei]'s Articles
[Wang Li]'s Articles
[Zhang Gong]'s Articles
Baidu academic
Similar articles in Baidu academic
[Li Yifei]'s Articles
[Wang Li]'s Articles
[Zhang Gong]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Li Yifei]'s Articles
[Wang Li]'s Articles
[Zhang Gong]'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.