Influence of section thickness of casting on the microstructure characteristics and creep rupture properties of Ti-45Al-2Nb-2Mn-1B

doi:10.1016/j.matchar.2023.113056

IMR OpenIR

	Influence of section thickness of casting on the microstructure characteristics and creep rupture properties of Ti-45Al-2Nb-2Mn-1B
	Cao, Ruxin 1,2; Ye, Xicong 3; Liu, Renci 1,2; Wang, Xi 4; Yang, Chao 5; Liu, Dong 1,2; Cui, Yuyou 1,2; Yang, Rui 1,2
通讯作者	Liu, Renci(ryang@imr.ac.cn) ; Yang, Rui(ryang@imr.ac.cn)
	2023-08-01
发表期刊	MATERIALS CHARACTERIZATION
ISSN	1044-5803
卷号	202 页码:11
摘要	Ti-45Al-2Nb-2Mn-1B (atomic percent, 4522XD) cast step plate with different thicknesses was prepared by in-vestment casting, and the variations of microstructure and creep rupture properties with thickness were examined. With decreasing thickness, lamellar colony size, lamellar thickness, and the size of equiaxed ? grains at the colony boundaries decreased, and the colony boundaries varied from smooth to serrated. Boride particles are mainly long flat needles in the region with 12 mm thickness, curvy flakes with considerable length and width in the region with 8 mm thickness, and curvy ribbons with small length in the region with 4 mm thickness. B27-TiB particles were observed in all the thicknesses, Ti3B4+ TiB2 lamellar particles were observed in the region with 8 mm and 12 mm thicknesses, and B-f-TiB+ TiB2 lamellar particles were observed in the region with 4 mm thickness. The smallest creep rupture elongation is obtained in samples taken from the plate with 12 mm thickness, while the shortest creep rupture life is obtained in samples taken from the region with 8 mm thickness. The former is attributed to the smooth colony boundaries which have weaker resistance to grain rotation, while the latter is attributed to the curvy boride particles that tend to nucleate cracks at the corner with small curve radius, providing a fast track for crack propagation along the boride/matrix interfaces, their considerable size makes the crack reach the critical size for fracture more easily. Weak creep rupture properties of some samples are mainly attributed to the aggregation of colonies whose lamellar interfaces are nearly perpendicular to the loading direction.
关键词	& gamma Investment casting Cooling rate Microstructure Boride Creep rupture property -TiAl alloy
资助者	CAS Project for Young Scientists in Basic Research ; National Natural Science Foundation of China ; Major Special Science and Tech-nology Project of Yunnan Province
DOI	10.1016/j.matchar.2023.113056
收录类别	SCI
语种	英语
资助项目	CAS Project for Young Scientists in Basic Research[YSBR-025] ; National Natural Science Foundation of China[51701209] ; National Natural Science Foundation of China[51604161] ; Major Special Science and Tech-nology Project of Yunnan Province[202002AB080001-3]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Materials Science, Characterization & Testing
WOS记录号	WOS:001018941200001
出版者	ELSEVIER SCIENCE INC
引用统计	被引频次：4[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/321006/178391
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.China Three Gorges Univ, Coll Mech & Power Engn, Yichang 443002, Peoples R China 4.Zhongye Changtian Int Engn Co LTD, Changsha 410205, Hunan, Peoples R China 5.AECC Commercial Aeroengine Co LTD, Shanghai 200241, Peoples R China
推荐引用方式 GB/T 7714	Cao, Ruxin,Ye, Xicong,Liu, Renci,et al. Influence of section thickness of casting on the microstructure characteristics and creep rupture properties of Ti-45Al-2Nb-2Mn-1B[J]. MATERIALS CHARACTERIZATION,2023,202:11.
APA	Cao, Ruxin.,Ye, Xicong.,Liu, Renci.,Wang, Xi.,Yang, Chao.,...&Yang, Rui.(2023).Influence of section thickness of casting on the microstructure characteristics and creep rupture properties of Ti-45Al-2Nb-2Mn-1B.MATERIALS CHARACTERIZATION,202,11.
MLA	Cao, Ruxin,et al."Influence of section thickness of casting on the microstructure characteristics and creep rupture properties of Ti-45Al-2Nb-2Mn-1B".MATERIALS CHARACTERIZATION 202(2023):11.