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Influences of Re on low-cycle fatigue behaviors of single crystal superalloys at intermediate temperature
Liu, Liu; Meng, Jie; Liu, Jinlai; Zou, Mingke; Zhang, Haifeng; Sun, Xudong; Zhou, Yizhou
2019-09-01
Source PublicationJOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN1005-0302
Volume35Issue:9Pages:1917-1924
AbstractLow-cycle fatigue behaviors of Ni-base single crystal superalloys containing different Re contents have been investigated at 760 degrees C. During heat treatment, Re retards gamma' phases coarsening and equalizes the distribution of gamma' phases. As Re content increases, fatigue life increases and slip bands distribute more inhomogeneously. Moreover, adding Re not only reduces stacking fault energy of the matrix, but also promotes the element segregation to increase the lattice misfit. However, the larger lattice misfit does not lead to the formation of dislocation networks, but which activates dislocation movement and promotes dislocations cross-slip and climbing movement under high temperature and applied stress. On the other hand, with the addition of Re, cyclic deformation behaviors change from cyclic hardening to cyclic stability, mainly depending on a transformation of deformation mechanisms from slip bands cutting through gamma and gamma phases to stacking faults shearing. (C) 2019 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
KeywordSingle crystal superalloys Low-cycle fatigue Deformation behaviors Deformation mechanisms
Indexed BySCI
Language英语
WOS IDWOS:000475870600013
PublisherJOURNAL MATER SCI TECHNOL
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/80807
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Liu, Liu,Meng, Jie,Liu, Jinlai,et al. Influences of Re on low-cycle fatigue behaviors of single crystal superalloys at intermediate temperature[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2019,35(9):1917-1924.
APA Liu, Liu.,Meng, Jie.,Liu, Jinlai.,Zou, Mingke.,Zhang, Haifeng.,...&Zhou, Yizhou.(2019).Influences of Re on low-cycle fatigue behaviors of single crystal superalloys at intermediate temperature.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,35(9),1917-1924.
MLA Liu, Liu,et al."Influences of Re on low-cycle fatigue behaviors of single crystal superalloys at intermediate temperature".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 35.9(2019):1917-1924.
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