Inhomogeneity Analyses of Microstructure and Mechanical Properties of TC21 Titanium Alloy Variable Cross-section Die Forgings for Aviation

doi:10.11900/0412.1961.2022.00313

IMR OpenIR

	Inhomogeneity Analyses of Microstructure and Mechanical Properties of TC21 Titanium Alloy Variable Cross-section Die Forgings for Aviation
	Yang Jie 1,2; Huang Sensen 2; Yin Hui 3; Zhai Ruizhi 3; Ma Yingjie 1,2; Xiang Wei 3; Luo Hengjun 3; Lei Jiafeng 1,2; Yang Rui 1,2
通讯作者	Ma Yingjie(yjma@imr.ac.cn)
	2024-03-01
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	60 期号:3 页码:333-347
摘要	TC21 titanium alloy has been successfully used in the structural die forgings of aviation owing to its excellent damage tolerance. However, because of the difference in the equivalent strains of die forgings, the microstructure and properties of variable cross-sections are considerably different, affecting the service life of the structural parts. Therefore, the microstructure and mechanical properties of beta -forged TC21 titanium alloy die forgings with variable cross-sections were characterized using Deform software simulation, OM, SEM, XRD, EBSD, and tensile and impact tests, and the primary factors affecting the tensile and impact properties as well as their anisotropy were comprehensively analyzed. The results showed that the overall shape of the die forgings was complex and the effective strain was concentrated in the range of 0.75-1.20. The evidence of the flow was obvious at high strain, the substructure increased, and the narrow cross-section led to a faster cooling rate. This resulted in the decrease of a p content and refinement of a s, which together led to the increase in strength. The evolution of various texture components under high strain during thermal deformation and heat treatment was analyzed, and finally the strong texture of residual beta phase < 110 >//LD and {0002} weak texture of transformed a phase were formed. The strength anisotropy caused by the strong texture was analyzed from a phase slip system and beta phase densely packed plane. The impact load-displacement curves showed that the impact energy was mainly consumed via the initiation energy. Combining with the prior b grain arrangement, the fracture modes of impact and tensile fracture in different orientations were discussed. Finally, a tensile fracture model was proposed, which explained the reason that there was a good strength and plastic matching at a high strain of 1.20. This work provides material research support for optimizing the uniformity design of TC21 alloy variable cross-section die forgings.
关键词	TC21 titanium alloy die forging effective strain texture mechanical property
DOI	10.11900/0412.1961.2022.00313
收录类别	SCI
语种	英语
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001193645500006
出版者	SCIENCE PRESS
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/185175
专题	中国科学院金属研究所
通讯作者	Ma Yingjie
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, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China 3.Deyang Wanhang Die Forging Co Ltd, China Natl Erzhong Grp, Deyang 618000, Peoples R China
推荐引用方式 GB/T 7714	Yang Jie,Huang Sensen,Yin Hui,et al. Inhomogeneity Analyses of Microstructure and Mechanical Properties of TC21 Titanium Alloy Variable Cross-section Die Forgings for Aviation[J]. ACTA METALLURGICA SINICA,2024,60(3):333-347.
APA	Yang Jie.,Huang Sensen.,Yin Hui.,Zhai Ruizhi.,Ma Yingjie.,...&Yang Rui.(2024).Inhomogeneity Analyses of Microstructure and Mechanical Properties of TC21 Titanium Alloy Variable Cross-section Die Forgings for Aviation.ACTA METALLURGICA SINICA,60(3),333-347.
MLA	Yang Jie,et al."Inhomogeneity Analyses of Microstructure and Mechanical Properties of TC21 Titanium Alloy Variable Cross-section Die Forgings for Aviation".ACTA METALLURGICA SINICA 60.3(2024):333-347.