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Role of microstructural stability and superdislocation shearing on creep behavior of two low-cost Ni-based single crystal superalloys at 1100 °C/ 130 MPa

文献类型：期刊论文

作者Lv, Peisen2; Liu, Lirong2; Yang, Yanhong1; Zhao, Yunsong3; Zhang, Jian3
刊名MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
出版日期2023-11-17
卷号888页码:13
关键词Single crystal superalloy Creep TCP phase Superdislocation network Superdislocation
ISSN号0921-5093
DOI10.1016/j.msea.2023.145796
通讯作者Liu, Lirong(lrliu@sut.edu.cn) ; Yang, Yanhong(yhyang@imr.ac.cn)
英文摘要In order to satisfy the pursuit of advanced aeroengines with low cost and high temperature capacity, the novel Re-free and Re-low single crystal superalloys were designed based on the strategy of Re-reduction. The creep lives of the two experimental alloys at 1100 degrees C/130 MPa both exceed that of Ren & eacute; N5, and the Re-low alloy displays better creep performance and microstructural stability than the Re-free alloy. At the end of steady creep stage, due to the strong hindrance of interfacial dislocation networks, only a few superdislocations with Burgers vectors a<110> and a<001> enter into gamma ' phase in the Re-low alloy. In the Re-free alloy, non-uniform plastic deformation leads to the severe gamma/gamma ' topological inversion, resulting in high-density a<110> superdislocation arrays in gamma ' rafts, which can further react to form superdislocation networks. Moreover, the increasing mu phase precipitated with the prolonging creep time also promotes earlier failure of the Re-free alloy. In summary, the Re addition can improve creep resistance through reducing rafting rate of gamma ' particles, stabilizing interfacial dislocation networks and increasing the APB energy of ordered gamma ' phase. The above results provide favorable experimental basis for the development of low-cost single crystal superalloys.
资助项目Natural Science Foundation of China[52001297]
WOS研究方向Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
语种英语
WOS记录号WOS:001102993300001
出版者ELSEVIER SCIENCE SA
资助机构Natural Science Foundation of China
源URL[http://ir.imr.ac.cn/handle/321006/177492]  
专题金属研究所_中国科学院金属研究所
通讯作者Liu, Lirong; Yang, Yanhong
作者单位1.Chinese Acad Sci, Inst Met Res, Shi changxu Innovat Ctr Adv Mat, Liaoning 110016, Peoples R China
2.Shenyang Univ Technol, Sch Mat Sci & Engn, Shenyang 110870, Liaoning, Peoples R China
3.Beijing Inst Aeronaut Mat, Sci & Technol Adv High Temp Struct Mat Lab, Beijing 100095, Peoples R China
推荐引用方式
GB/T 7714		 Lv, Peisen,Liu, Lirong,Yang, Yanhong,et al. Role of microstructural stability and superdislocation shearing on creep behavior of two low-cost Ni-based single crystal superalloys at 1100 &deg;C/ 130 MPa[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2023,888:13.
APA Lv, Peisen,Liu, Lirong,Yang, Yanhong,Zhao, Yunsong,&Zhang, Jian.(2023).Role of microstructural stability and superdislocation shearing on creep behavior of two low-cost Ni-based single crystal superalloys at 1100 °C/ 130 MPa.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,888,13.
MLA Lv, Peisen,et al."Role of microstructural stability and superdislocation shearing on creep behavior of two low-cost Ni-based single crystal superalloys at 1100 °C/ 130 MPa".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 888(2023):13.

入库方式： OAI收割

来源：金属研究所

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