Substantially strengthening a dual-phase titanium alloy by moderate oxygen doping

doi:10.1016/j.scriptamat.2022.115236

CORC > 力学研究所 > 中国科学院力学研究所 > 流固耦合系统力学重点实验室(2012-)

	Substantially strengthening a dual-phase titanium alloy by moderate oxygen doping
	Fu,Yu 4; Xiao,Wenlong 3,4; Zhao,Shiteng 4; Ren L(任磊)2,4; Wang,Junshuai 4; Rong,Jian 4; Li,Juan 1; Zhao,Xinqing 4; Ma,Chaoli 3,4
刊名	SCRIPTA MATERIALIA
	2023-03-15
卷号	226 页码:7
关键词	Titanium alloy Equiaxed microstructure Interstitial oxygen High strength Deformation mechanisms
ISSN号	1359-6462
DOI	10.1016/j.scriptamat.2022.115236
通讯作者	Xiao, Wenlong(wlxiao@buaa.edu.cn)
英文摘要	As one of the detrimental ingredients, oxygen can, even in a small amount, substantially reduce the ductility of Ti alloys. Here, rather than being discouraged by the negative effects of oxygen on ductility, an equiaxed dual-phase Ti-8Nb-2Fe-0.66O (wt.%) alloy showing ultrahigh yield strength (1386 MPa) and good tensile ductility (fracture elongation similar to 10.8%) was developed. The oxygen-containing alloy is 87% stronger than the oxygen-free base alloy whereas the ductility loss is marginal. The effects of oxygen interstitials can be twofold: they led to significant solid-solution strengthening by pinning dislocations and suppressing stress-induced martensitic transformation; the equiaxed alpha + beta dual-phase with basal alpha texture doped by oxygen promoted multiple < c + a >-type and < a >-type dislocation activities that guaranteed good ductility. This work demonstrates a new avenue to develop high-strength Ti alloys by doping oxygen interstitials, which takes full advantage of the beneficial strengthening factor of oxygen while avoiding its detrimental embrittlement effect.
分类号	一类
资助项目	National Natural Science Foundation of China ; Youth Talent Support Program of Beihang University ; China Aviation Devel- opment Independent Innovation Special Fund Project ; [51671012] ; [52001018] ; [CXPT- 2020-033]
WOS关键词	DUCTILITY ; MICROSTRUCTURE ; TEMPERATURE ; MECHANISM ; BEHAVIOR
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
WOS记录号	WOS:000902172200003
资助机构	National Natural Science Foundation of China ; Youth Talent Support Program of Beihang University ; China Aviation Devel- opment Independent Innovation Special Fund Project
其他责任者	Xiao, Wenlong
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/91317]
专题	力学研究所_流固耦合系统力学重点实验室(2012-)
作者单位	1.AECC Beijing Inst Aeronaut Mat, Beijing 100095, Peoples R China 2.Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China; 3.Beihang Univ, Yunnan Innovat Inst, Kunming 650000, Peoples R China; 4.Beihang Univ, Sch Mat Sci & Engn, Key Lab Aerosp Adv Mat & Performance, Minist Educ, Beijing 100191, Peoples R China;
推荐引用方式 GB/T 7714	Fu,Yu,Xiao,Wenlong,Zhao,Shiteng,et al. Substantially strengthening a dual-phase titanium alloy by moderate oxygen doping[J]. SCRIPTA MATERIALIA,2023,226:7.
APA	Fu,Yu.,Xiao,Wenlong.,Zhao,Shiteng.,任磊.,Wang,Junshuai.,...&Ma,Chaoli.(2023).Substantially strengthening a dual-phase titanium alloy by moderate oxygen doping.SCRIPTA MATERIALIA,226,7.
MLA	Fu,Yu,et al."Substantially strengthening a dual-phase titanium alloy by moderate oxygen doping".SCRIPTA MATERIALIA 226(2023):7.