中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Investigation of uniaxial ratcheting fatigue behaviours and fracture mechanism of GH742 superalloy at 923 K

文献类型:期刊论文

作者Kong, Weiwen1,2; Wang, Yongqiang1,2; Chen, Yipeng1,2; Liu, Xin1; Yuan, Chao1
刊名MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
出版日期2022-01-13
卷号831页码:15
ISSN号0921-5093
关键词GH742 superalloy Ratcheting fatigue Stress amplitude Mean stress Fatigue life
DOI10.1016/j.msea.2021.142173
通讯作者Yuan, Chao(ychao@imr.ac.cn)
英文摘要In this study, the ratcheting fatigue behaviours of GH742 superalloy at 923 K were investigated through a series of symmetric and asymmetric stress-controlled tests. The effects of stress amplitude and mean stress on the fa-tigue behaviours were analysed through scanning electron microscopy, transmission electron microscopy and electron backscatter diffraction. The results highlight that the fatigue life significantly decreases with increasing mean stress or stress amplitude. Tensile ratcheting strain occurs and increases with the increasing number of cycles under both symmetric and asymmetric cyclic loading. The alloy initially exhibits a cyclic hardening response, followed by cyclic softening until fracture failure under symmetric and asymmetric cyclic loading. The increase in mean stress promotes the cyclic softening in the tensile strain direction to a certain extent. The fracture mode does not change with increasing mean stress. Multiple fatigue cracks initiate from the surface inclusions, crystallographic facets and slip bands, and propagate in mixed transgranular and intergranular modes. The modified Basquin equation, which considers the mean stress and stress amplitude, can accurately predict the fatigue life, and all the fatigue data are located within the 1.5X scatter band.
WOS研究方向Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
语种英语
出版者ELSEVIER SCIENCE SA
WOS记录号WOS:000710160600002
源URL[http://ir.imr.ac.cn/handle/321006/166636]  
专题金属研究所_中国科学院金属研究所
通讯作者Yuan, Chao
作者单位1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
推荐引用方式
GB/T 7714
Kong, Weiwen,Wang, Yongqiang,Chen, Yipeng,et al. Investigation of uniaxial ratcheting fatigue behaviours and fracture mechanism of GH742 superalloy at 923 K[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2022,831:15.
APA Kong, Weiwen,Wang, Yongqiang,Chen, Yipeng,Liu, Xin,&Yuan, Chao.(2022).Investigation of uniaxial ratcheting fatigue behaviours and fracture mechanism of GH742 superalloy at 923 K.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,831,15.
MLA Kong, Weiwen,et al."Investigation of uniaxial ratcheting fatigue behaviours and fracture mechanism of GH742 superalloy at 923 K".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 831(2022):15.

入库方式: OAI收割

来源:金属研究所

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