Effects of Mo on the evolution of microstructures and mechanical properties in Co-Al-W base superalloys

doi:10.1016/j.msea.2018.11.087

IMR OpenIR

	Effects of Mo on the evolution of microstructures and mechanical properties in Co-Al-W base superalloys
	Liu, J.1,2; Yu, J. J.1; Yang, Y. H.1; Zhou, Y. Z.1; Sun, X. F.1
通讯作者	Yu, J. J.(jjyu@imr.ac.cn) ; Yang, Y. H.(yhyang@imr.ac.cn)
	2019-02-04
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	745 页码:404-410
摘要	The solidification paths, microstructures and mechanical properties of two Co-Al-W base superalloys with different additions of tungsten and molybdenum were investigated. Mo addition does not influence the volume fraction of the gamma' phase; however, the morphology of the gamma' phase changes from cuboidal to near cuboidal. The mu phase and beta phase were identified in both alloy systems. Although the melting point of the mu phase is decreased by Mo addition, the solidification paths remain the same: L -> L-1 + gamma -> L-2 + gamma + mu -> gamma + mu + beta -> gamma + mu + beta + gamma' . The precipitation of a gamma' phase envelop around the interdendritic regions in Co-Al-W alloy systems has never been reported. The formation of a surrounding gamma' phase was caused by the diffusion of elements between secondary phases and the substrate during the heat treatments. The microhardness of the mu phase, which can be easily influenced by Mo addition, is the highest in both alloys, followed by the microhardnesses of the beta phase and the substrate. In the fracturing process, microcracks were generated in the mu phase, the number of which increased with Mo addition.
关键词	Co-base superalloys Molybdenum Microstructures Tensile behavior Solidification path
资助者	National Key Research and Development Program of China ; National Natural Science Foundation of China (NSFC)
DOI	10.1016/j.msea.2018.11.087
收录类别	SCI
语种	英语
资助项目	National Key Research and Development Program of China[2017YFA0700704] ; National Natural Science Foundation of China (NSFC)[51571196] ; National Natural Science Foundation of China (NSFC)[51701210] ; National Natural Science Foundation of China (NSFC)[51771191] ; National Natural Science Foundation of China (NSFC)[51601192] ; National Natural Science Foundation of China (NSFC)[51701212] ; National Natural Science Foundation of China (NSFC)[51671188]
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000457819400043
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：20[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/321006/131856
专题	中国科学院金属研究所
通讯作者	Yu, J. J.; Yang, Y. H.
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China
推荐引用方式 GB/T 7714	Liu, J.,Yu, J. J.,Yang, Y. H.,et al. Effects of Mo on the evolution of microstructures and mechanical properties in Co-Al-W base superalloys[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2019,745:404-410.
APA	Liu, J.,Yu, J. J.,Yang, Y. H.,Zhou, Y. Z.,&Sun, X. F..(2019).Effects of Mo on the evolution of microstructures and mechanical properties in Co-Al-W base superalloys.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,745,404-410.
MLA	Liu, J.,et al."Effects of Mo on the evolution of microstructures and mechanical properties in Co-Al-W base superalloys".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 745(2019):404-410.