Structures and formation mechanism of borides with varied morphologies in cast y-TiAl alloys

doi:10.1016/j.matdes.2023.112122

IMR OpenIR

	Structures and formation mechanism of borides with varied morphologies in cast y-TiAl alloys
	Cao, Ruxin 1,2; Liu, Renci 1,2; Yang, Chao 3; Cui, Yuyou 1,2; Yang, Rui 1,2
通讯作者	Liu, Renci(rcliu@imr.ac.cn) ; Yang, Rui(ryang@imr.ac.cn)
	2023-08-01
发表期刊	MATERIALS & DESIGN
ISSN	0264-1275
卷号	232 页码:9
摘要	Borides with varied morphologies and structures obtained by changing B content in as-cast Ti-45Al-2Mn-2Nb alloys are investigated. With the increase of B content, morphologies of borides change from curved to straight, and flake shape, ribbon shape, needle/rod shape, and blocky appear in turn. Curved boride particles have a lamellar structure composed of TiB2 and B2 layers, accompanied by the random appear-ance and distribution of Ti3B4 and Bf-TiB layers. Except for the absence of the B2 layer, straight needle-like and blocky boride particles have roughly the same structure as curved boride particles, revealing that the formation of curved boride particles is accompanied by divorced eutectic with the matrix and internal irregular eutectic, while no eutectics occurs in straight boride particles. The lack of B atoms during solid-ification in alloys with lower B content results in a less regular structure and higher stacking fault density of curved boride particles compared to straight boride particles in alloys with higher B content. In addi-tion, some needle-like boride particles are observed to have pure B27-TiB structure without intergrowth. The difference in morphologies and structures can be attributed to the difference in formation mecha-nism and crystallographic structures of the borides.& COPY; 2023 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
关键词	Cast Boride Morphology Structure
资助者	CAS Project for Young Scientists in Basic Research ; Major Special Science and Tech- nology Project of Yunnan Province
DOI	10.1016/j.matdes.2023.112122
收录类别	SCI
语种	英语
资助项目	CAS Project for Young Scientists in Basic Research[YSBR-025] ; Major Special Science and Tech- nology Project of Yunnan Province[202002AB080001-3]
WOS研究方向	Materials Science
WOS类目	Materials Science, Multidisciplinary
WOS记录号	WOS:001060168900001
出版者	ELSEVIER SCI LTD
引用统计	被引频次：3[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/321006/179093
专题	中国科学院金属研究所
通讯作者	Liu, Renci; Yang, Rui
作者单位	1.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 3.AECC Commercial Aeroengine Co LTD, Shanghai 200241, Peoples R China
推荐引用方式 GB/T 7714	Cao, Ruxin,Liu, Renci,Yang, Chao,et al. Structures and formation mechanism of borides with varied morphologies in cast y-TiAl alloys[J]. MATERIALS & DESIGN,2023,232:9.
APA	Cao, Ruxin,Liu, Renci,Yang, Chao,Cui, Yuyou,&Yang, Rui.(2023).Structures and formation mechanism of borides with varied morphologies in cast y-TiAl alloys.MATERIALS & DESIGN,232,9.
MLA	Cao, Ruxin,et al."Structures and formation mechanism of borides with varied morphologies in cast y-TiAl alloys".MATERIALS & DESIGN 232(2023):9.