Tensile behavior of cast &gamma;-TiAl alloys with varied boride morphologies

doi:10.1016/j.msea.2023.145807

IMR OpenIR

	Tensile behavior of cast γ-TiAl alloys with varied boride morphologies
	Cao, Ruxin 1,2; Liu, Renci 1,2; Yang, Chao 3; Zhu, Zuohai 1; Wang, Yaran 1; Cui, Yuyou 1,2; Yang, Rui 1,2
通讯作者	Liu, Renci(rcliu@imr.ac.cn)
	2023-11-17
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	888 页码:11
摘要	Boride particles of various sizes and morphologies were obtained by adjusting the boron content and solidification rate of castings in Ti-45Al-2Mn-2Nb alloys. The initial and deformation microstructures, as well as the tensile properties at 25 degrees C and 650 degrees C, were examined. Furthermore, the fracture behavior of the alloys and the influence of boride particle with different morphologies on the tensile properties were discussed. Boride particles are curved flaky in 0.5B alloys, and varied from straight rod/needle-like to curved ribbon-like with increasing cooling rates in 1B alloys. Abundant phase interfaces, along with the presence of growth stacking faults and lattice distortions, are prominently observed in curved flaky and ribbon-like boride particles. Conversely, straight boride particles exhibit better regularity, with fewer lattice distortions and a lower density of interfaces and stacking faults. At both 25 degrees C and 650 degrees C, samples containing flaky boride particles exhibit the highest yield strength but the lowest elongation, while samples containing rod/needle-like boride particles show the lowest yield strength but the highest elongation. Curved boride particles exhibited no deformation, while their interfaces with the matrix accumulated a significant volume fraction of dislocations. This accumulation of dislocations causes stress concentration and created sites for the initiation of cracks. Additionally, the larger surface area of flaky boride particles promotes the growth of larger cracks, thus reducing ductility. On the other hand, straight rod/needle-like particles underwent deformation, resulting in the formation of deformation stacking faults on (0001) of C32-TiB2 and (10 1) of B27-TiB, showing better deformation compatibility between the borides and matrix.
关键词	gamma-TiAl Cast Boride Morphology Tensile behavior
资助者	CAS Project for Young Scientists in Basic Research ; Major Special Science and Technology Project of Yunnan Province ; National Key Research and Development Program of China ; National Major science and Technology Projects of China
DOI	10.1016/j.msea.2023.145807
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 Technology Project of Yunnan Province[202302AB080009] ; National Key Research and Development Program of China[2021YFB3702605] ; National Major science and Technology Projects of China[J2019-VII-0002-0142]
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:001106816700001
出版者	ELSEVIER SCIENCE SA
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/321006/177229
专题	中国科学院金属研究所
通讯作者	Liu, Renci
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, 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. Tensile behavior of cast γ-TiAl alloys with varied boride morphologies[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2023,888:11.
APA	Cao, Ruxin.,Liu, Renci.,Yang, Chao.,Zhu, Zuohai.,Wang, Yaran.,...&Yang, Rui.(2023).Tensile behavior of cast γ-TiAl alloys with varied boride morphologies.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,888,11.
MLA	Cao, Ruxin,et al."Tensile behavior of cast γ-TiAl alloys with varied boride morphologies".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 888(2023):11.