α" martensite engineering: A strategy to achieve high yield strength and low yield ratio synergy for dual-phase titanium alloy

doi:10.1016/j.matdes.2024.112764

IMR OpenIR

	α" martensite engineering: A strategy to achieve high yield strength and low yield ratio synergy for dual-phase titanium alloy
	Li, Diao-Feng 1,2; Bai, Chun-Guang 1,2,3; Zhang, Zhi-Qiang 1,2; Wang, Ran 1,2; Li, Nan 1,2; Yang, Rui 1,2,3
通讯作者	Bai, Chun-Guang(cgbai@imr.ac.cn) ; Li, Nan(nli@imr.ac.cn)
	2024-03-01
发表期刊	MATERIALS & DESIGN
ISSN	0264-1275
卷号	239 页码:15
摘要	To breakthrough the long-term contradictory issue of high yield strength and low yield ratio for titanium alloys, and achieving the superior balance between these two key mechanical parameters. We have proposed an efficient "Quenching -> Cold deformation -> Recrystallization annealing" (QCR) strategy, which realizes the high yield strength (900 MPa) and low yield ratio (0.74) synergy for a model Ti6Al4V5.5Cu (wt.%) alloy which characterized with the unique multi-scale heterogeneous structure. The developed QCR processing route is based on the subtle utilization of orthorhombic alpha '' martensite, which plays the various roles in each processing step. By elaborately manipulating the recrystallization degree, chemical stability, effective domain of beta phase and alpha(t) nano-precipitates in beta phase, the stress-induced alpha '' martensite transformation (SIM alpha '') can be controlled effectively and even postponed until after yielding induced by dislocation mechanisms, thus leading to substantially improvement of yield strength. After yielding, abundant proliferation of SIM alpha '' which assisted by multi-scale alpha phases and their interactions are the fundamental reasons for achieving higher work-hardening ability, tensile strength (1215 MPa) and uniform elongation (11%). Thus, the core strategy to realize the excellent combination of high yield strength and low yield ratio is manipulating the activation sequence of the plastic deformation carriers.
关键词	Titanium alloy alpha 'martensite Yield ratio Stress -induced martensite transformation Heterogeneous structure design
资助者	IMR Innovation Fund ; National Key Research and Development Program of China ; Central Government Guided Local Project of China
DOI	10.1016/j.matdes.2024.112764
收录类别	SCI
语种	英语
资助项目	IMR Innovation Fund[2024-PY06] ; National Key Research and Development Program of China[2022YFB3708300] ; Central Government Guided Local Project of China[1666856143202]
WOS研究方向	Materials Science
WOS类目	Materials Science, Multidisciplinary
WOS记录号	WOS:001195302700001
出版者	ELSEVIER SCI LTD
引用统计	被引频次：14[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/321006/185232
专题	中国科学院金属研究所
通讯作者	Bai, Chun-Guang; Li, Nan
作者单位	1.Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shi changxu Innovat Ctr Adv Mat, 72 Wenhua Rd, Shenyang 110016, Peoples R China 3.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Li, Diao-Feng,Bai, Chun-Guang,Zhang, Zhi-Qiang,et al. α" martensite engineering: A strategy to achieve high yield strength and low yield ratio synergy for dual-phase titanium alloy[J]. MATERIALS & DESIGN,2024,239:15.
APA	Li, Diao-Feng,Bai, Chun-Guang,Zhang, Zhi-Qiang,Wang, Ran,Li, Nan,&Yang, Rui.(2024).α" martensite engineering: A strategy to achieve high yield strength and low yield ratio synergy for dual-phase titanium alloy.MATERIALS & DESIGN,239,15.
MLA	Li, Diao-Feng,et al."α" martensite engineering: A strategy to achieve high yield strength and low yield ratio synergy for dual-phase titanium alloy".MATERIALS & DESIGN 239(2024):15.