{101¯2} twinning induced by the interaction between {112¯1} twin and β phase in α+β Ti alloys

doi:10.1016/j.actamat.2022.117900

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	{101¯2} twinning induced by the interaction between {112¯1} twin and β phase in α+β Ti alloys
	Zheng, Xiaodong 1,6; Liu, Guisen 4; Zheng, Shijian 1,6; Ma, Yingjie 5; Yang, Rui 5; Wang, Jian 3; Ma, Xiuliang 1,2
刊名	Acta Materialia
	2022-06-01
卷号	231
关键词	Plastic deformation Shear stress Titanium alloys Deformation twin Fully lamellar Interaction area Severe plastic deformations Strengthening effect Ti alloys Transfer mechanisms {101¯2} twin {112¯1} twin β Ti alloy
ISSN号	1359-6454
DOI	10.1016/j.actamat.2022.117900
英文摘要	Severe plastic deformation induces numerous deformation twins in fully lamellar α+β Ti alloys. Interaction between deformation twins and β phase brings a strong strengthening effect, however, the twinning transfer mechanism across α/β interface is still unclear. In this work, we report the interaction behavior and transfer mechanism of {112¯1} twin across α/β interface. Different from the common case that twinning strain transferred by plastic deformation of β phase, the interaction between {112¯1} twin and β phase induces {101¯2} twinning around the interaction area and the β phase is free of plastic deformation. Experiments show that {101¯2} twins will nucleate in four quadrants of the intersection between {112¯1} twin and β phase when the β phase is thicker, whereas {101¯2} twins will only nucleate in one pair of diagonal quadrants of the intersection when the β phase is thinner. The reason is that the strain field around the intersection between {112¯1} twin and β phase is correlated with the thickness of β phase, which ultimately determines where {101¯2} twins nucleate. Moreover, transmission electron microscopy (TEM) investigations reveal that the β phase will block the motivation of {112¯1} twinning dislocation bt{112¯1}. In this situation, the twinning transfer of {112¯1} twin through the β phase is accomplished with the help of elastic deformation of β phase and nucleation of sequential {101¯2} twins. The {101¯2} twinning is facilitated by the dissociation of bt{112¯1} dislocations at the α/β interface promoted by the {112¯1} twinning shear stress field at the interaction area. © 2022
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	Acta Materialia Inc
WOS记录号	WOS:000793420000004
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/157871]
专题	材料科学与工程学院_特聘教授组
作者单位	1.Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang; 110016, China; 2.School of Material Science and Engineering, Lanzhou University of Technology, Lanzhou; 730050, China 3.Mechanical and Materials Engineering, University of Nebraska-Lincoln, Lincoln; NE; 68588, United States; 4.The State Key Lab of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai; 200240, China; 5.Institute of Metal Research, Chinese Academy of Sciences, Shenyang; 110016, China; 6.Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology, School of Materials Science and Engineering, Hebei University of Technology, Tianjin; 300130, China;
推荐引用方式 GB/T 7714	Zheng, Xiaodong,Liu, Guisen,Zheng, Shijian,et al. {101¯2} twinning induced by the interaction between {112¯1} twin and β phase in α+β Ti alloys[J]. Acta Materialia,2022,231.
APA	Zheng, Xiaodong.,Liu, Guisen.,Zheng, Shijian.,Ma, Yingjie.,Yang, Rui.,...&Ma, Xiuliang.(2022).{101¯2} twinning induced by the interaction between {112¯1} twin and β phase in α+β Ti alloys.Acta Materialia,231.
MLA	Zheng, Xiaodong,et al."{101¯2} twinning induced by the interaction between {112¯1} twin and β phase in α+β Ti alloys".Acta Materialia 231(2022).