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

doi:10.3390/ma15217509

IMR OpenIR

	Effect of Mo on the Microstructures and Mechanical Properties of the Polycrystalline Superalloy with High W Content
	Quan, Qiongrui 1; Sun, Shijie 2; Sheng, Naicheng 2; Deng, Juan 1; Hou, Guichen 2; Li, Jinguo 2; Chen, Jidong 1; Zhou, Yizhou 2; Sun, Xiaofeng 2
通讯作者	Sun, Shijie(sjsun16b@imr.ac.cn) ; Sheng, Naicheng(ncsheng@imr.ac.cn)
	2022-11-01
发表期刊	MATERIALS
卷号	15 期号:21 页码:12
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.
关键词	high-W superalloy Mo content TCP phase mechanical properties
资助者	IMR Innovation Fund, China ; China Postdoctoral Science Foundation, China ; Special Research Assistant Program of Chinese Academy of Sciences
DOI	10.3390/ma15217509
收录类别	SCI
语种	英语
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
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Physics, Applied ; Physics, Condensed Matter
WOS记录号	WOS:000881165100001
出版者	MDPI
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/176577
专题	中国科学院金属研究所
通讯作者	Sun, Shijie; Sheng, Naicheng
作者单位	1.AECC Aero Sci & Technol Co Ltd, Chengdu 61000, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, 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.