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Effect of Mo on the Microstructures and Mechanical Properties of the Polycrystalline Superalloy with High W Content

文献类型：期刊论文

作者Quan, Qiongrui2; Sun, Shijie1; Sheng, Naicheng1; Deng, Juan2; Hou, Guichen1; Li, Jinguo1; Chen, Jidong2; Zhou, Yizhou1; Sun, Xiaofeng1
刊名MATERIALS
出版日期2022-11-01
卷号15期号:21页码:12
关键词high-W superalloy Mo content TCP phase mechanical properties
DOI10.3390/ma15217509
通讯作者Sun, Shijie(sjsun16b@imr.ac.cn) ; Sheng, Naicheng(ncsheng@imr.ac.cn)
英文摘要The effect of the Mo contents of 1.0 wt.%, 1.5 wt.%, 2.0 wt.%, and 3.0 wt.% on the microstructures and mechanical properties of the polycrystalline superalloy with a high W content was studied. The typical dendrite morphology was observed in the high-W superalloy with different Mo contents, containing gamma matrix, gamma ' phase, eutectic, and MC carbide. After the heat treatment, the primary MC carbides were decomposed into M6C carbides, while a needle-like topologically close-packed (TCP) phase was formed in the alloy with high Mo content, in contrast to the other three alloys with low Mo content. The Mo addition increased the lattice parameter of the gamma and gamma ' phases and also changed the lattice misfits of the gamma and gamma ' phase lattice misfits towards a larger negative. The addition of Mo improved the yield strength at room temperature due to the solid solution strengthening and coherency strengthening. The improvement of the stress rupture lives at 975 degrees C/225 MPa was due to the combination of the suppressed propagation of the microcracks by the carbides and a more negative misfit. When the Mo content reached 3.0 wt.%, the TCP phases formed and decreased the ultimate tensile strength and the stress rupture lives as a result.
资助项目IMR Innovation Fund, China[2021-PY16] ; China Postdoctoral Science Foundation, China[2021M703275] ; Special Research Assistant Program of Chinese Academy of Sciences
WOS研究方向Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering ; Physics
语种英语
WOS记录号WOS:000881165100001
出版者MDPI
资助机构IMR Innovation Fund, China ; China Postdoctoral Science Foundation, China ; Special Research Assistant Program of Chinese Academy of Sciences
源URL[http://ir.imr.ac.cn/handle/321006/176576]  
专题金属研究所_中国科学院金属研究所
通讯作者Sun, Shijie; Sheng, Naicheng
作者单位1.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China
2.AECC Aero Sci & Technol Co Ltd, Chengdu 61000, Peoples R China
推荐引用方式
GB/T 7714		 Quan, Qiongrui,Sun, Shijie,Sheng, Naicheng,et al. Effect of Mo on the Microstructures and Mechanical Properties of the Polycrystalline Superalloy with High W Content[J]. MATERIALS,2022,15(21):12.
APA Quan, Qiongrui.,Sun, Shijie.,Sheng, Naicheng.,Deng, Juan.,Hou, Guichen.,...&Sun, Xiaofeng.(2022).Effect of Mo on the Microstructures and Mechanical Properties of the Polycrystalline Superalloy with High W Content.MATERIALS,15(21),12.
MLA Quan, Qiongrui,et al."Effect of Mo on the Microstructures and Mechanical Properties of the Polycrystalline Superalloy with High W Content".MATERIALS 15.21(2022):12.

入库方式： OAI收割

来源：金属研究所

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