Effect of oxygen content on active deformation systems in pure titanium polycrystals

doi:10.1016/j.msea.2018.06.083

	Effect of oxygen content on active deformation systems in pure titanium polycrystals
	Ren, J.Q.1,2; Wang, Q.3; Lu, X.F.1,2; Liu, W.F.3; Zhang, P.L.1,2; Zhang, X.B.1,2
刊名	Materials Science and Engineering A
	2018-07-25
卷号	731 页码:530-538
关键词	Deformation Oxygen Polycrystals Titanium Trace analysis Twinning Yield stress Active deformation Compressive yield stress Deformation modes EBSD Electron back-scattered diffraction Grain orientation Local stress concentration Pure titaniums
ISSN号	09215093
DOI	10.1016/j.msea.2018.06.083
英文摘要	The Ti-0.1 wt% O and Ti-0.3 wt% O polycrystals were compressed along the extrusion direction and the incidence of different deformation modes were evaluated by electron backscattered diffraction (EBSD)-assisted slip trace analysis. It was found that a transition from single prismatic slip in Ti-0.1O to double prismatic slip or multiple slip in Ti-0.3O polycrystals dominated flow was observed. The reason for such transition was associated with the decreasing of CRSSpyramidal/CRSSprismatic ratio and the increasing of c/a ratio as the oxygen content increasing. Meanwhile, the deformation twins were less observed in Ti-0.3O than that in Ti-0.1O polycrystals, and all the characterized deformation twins were {1012}〈1011〉. Interestingly, because the influence of the grain orientation and high local stress concentrations, {1012}〈1011〉 twins with lower Schmid factor (SF) than that of prismatic slip were often activated in Ti-0.1O polycrystals. As the oxygen content increases, the interaction between the solute oxygen and the core of crew dislocation was enhanced, and the mobility of the dislocation becomes difficult. As a consequence, the compressive yield stress of Ti-0.3O was about 2.5 times that of Ti-0.1O polycrystals. © 2018 Elsevier B.V.
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	Elsevier Ltd
WOS记录号	WOS:000440881000056
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/150556]
专题	材料科学与工程学院省部共建有色金属先进加工与再利用国家重点实验室
作者单位	1.State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China; 2.Key Laboratory of Nonferrous Metal alloys and Processing, Ministry of Education, Lanzhou University of Technology, Lanzhou; 730050, China; 3.Huanghuai University, Zhumadian; Henan; 463000, China
推荐引用方式 GB/T 7714	Ren, J.Q.,Wang, Q.,Lu, X.F.,et al. Effect of oxygen content on active deformation systems in pure titanium polycrystals[J]. Materials Science and Engineering A,2018,731:530-538.
APA	Ren, J.Q.,Wang, Q.,Lu, X.F.,Liu, W.F.,Zhang, P.L.,&Zhang, X.B..(2018).Effect of oxygen content on active deformation systems in pure titanium polycrystals.Materials Science and Engineering A,731,530-538.
MLA	Ren, J.Q.,et al."Effect of oxygen content on active deformation systems in pure titanium polycrystals".Materials Science and Engineering A 731(2018):530-538.