Characterization of beta flecks and local solute segregation in Ti-17 alloy ingots produced by vacuum arc remelting

doi:10.1177/02670836241295712

IMR OpenIR

	Characterization of beta flecks and local solute segregation in Ti-17 alloy ingots produced by vacuum arc remelting
	Yin, Xuchen 1,2; Liu, Jianrong 3; Wang, Qingjiang 3; Li, Wenyuan 3; Deng, Hao 2; Wang, Zhoutian 2; Luo, Hengjun 2; Li, Wenhui 1
通讯作者	Liu, Jianrong(jrliu@imr.ac.cn) ; Wang, Qingjiang(qjwang@imr.ac.cn)
	2024-11-04
发表期刊	MATERIALS SCIENCE AND TECHNOLOGY
ISSN	0267-0836
页码	10
摘要	As a melt defect, beta flecks (beta-flecks) may exist in many metastable beta and alpha + beta titanium alloys. In this work, the main characteristics of beta-flecks, including detectability, macroscopic morphology, microstructural characteristics, and chemical composition, were investigated in an industrial-scale Ti-17 ingot produced by the vacuum arc remelting (VAR) process. The results show that beta-flecks can be identified as dark areas in the ingot head through a specific heat treatment. Enrichment of Cr and Zr, along with deficiency of Mo, is found in the beta-flecks, resulting in a lowered beta transformation temperature (T beta) and increased beta phase stability in local areas. When soaked at temperatures from 45 to 15 degrees C below T beta, beta-flecks can be distinctly visualized by adjusting the volume of alpha phase. Additionally, beta-flecks exhibit continuous fluctuations in both chemical composition and microstructure, closely related to the size of the beta-flecks. Based on the findings, it can be concluded that beta-flecks may originate from residual segregated liquid during the final stage of solidification processes, forming as local defects in the final solidified microstructure. Analytical and numerical modeling provide insights into how solute elements segregate and evolve into beta-fleck defects.
关键词	beta flecks melt defects titanium alloy ingot vacuum arc remelting local solute segregation
资助者	Fundamental Research Program of Shanxi Province ; Scientific Research Foundation of Taiyuan University of Technology
DOI	10.1177/02670836241295712
收录类别	SCI
语种	英语
资助项目	Fundamental Research Program of Shanxi Province[202103021223052] ; Scientific Research Foundation of Taiyuan University of Technology[2022QN152]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001347123800001
出版者	SAGE PUBLICATIONS INC
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/191123
专题	中国科学院金属研究所
通讯作者	Liu, Jianrong; Wang, Qingjiang
作者单位	1.Taiyuan Univ Technol, Coll Aeronaut & Astronaut, Taiyuan, Peoples R China 2.China Natl Erzhong Grp, Deyang Wanhang Die Forging Co Ltd, Deyang, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Yin, Xuchen,Liu, Jianrong,Wang, Qingjiang,et al. Characterization of beta flecks and local solute segregation in Ti-17 alloy ingots produced by vacuum arc remelting[J]. MATERIALS SCIENCE AND TECHNOLOGY,2024:10.
APA	Yin, Xuchen.,Liu, Jianrong.,Wang, Qingjiang.,Li, Wenyuan.,Deng, Hao.,...&Li, Wenhui.(2024).Characterization of beta flecks and local solute segregation in Ti-17 alloy ingots produced by vacuum arc remelting.MATERIALS SCIENCE AND TECHNOLOGY,10.
MLA	Yin, Xuchen,et al."Characterization of beta flecks and local solute segregation in Ti-17 alloy ingots produced by vacuum arc remelting".MATERIALS SCIENCE AND TECHNOLOGY (2024):10.