In situ scanning and transmission electron microscopy investigation on plastic deformation in a metastable beta titanium alloy

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	In situ scanning and transmission electron microscopy investigation on plastic deformation in a metastable beta titanium alloy
	Yao, Tingting; Du, Kui; Wang, Haoliang; Huang, Zhiye; Li, Cuihong; Li, Linlin; Hao, Yulin; Yang, Rui; Ye, Hengqiang; Du, K (reprint author), Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China.
刊名	PERGAMON-ELSEVIER SCIENCE LTD
	2017-07-01
卷号	133 页码:21-29
关键词	In Situ Tem Titanium Alloys Deformation Twinning Martensitic Transformation Deformation Mechanism Strain Hardening
ISSN号	1359-6454
英文摘要	Martensitic transformation and deformation twinning are investigated in Ti-24Nb-4Zr-8Sn (wt. %) alloy with in situ tensile deformation in scanning and transmission electron microscopes. Deformation induced beta to alpha'' martensitic transformation occurs at a stress plateau stage of similar to 200 MPa and deformation twinning takes place subsequently at later strain hardening stage. In situ transmission electron microscopy observations combined with finite element method calculation reveal that three deformation mechanisms, alpha'' martensitic transformation, {112}< 111 >beta deformation twinning and kinks of alpha" lamellae, are activated with the increase of applied stress/strain. Among them, deformation-induced 13 to a" phase transformation dominates the early-stage deformation. As the stress increasing, {112}< 111 >beta deformation twinning is activated and becomes the dominating deformation mechanism afterward. Interactions between dislocation slips and martensite/twin lamellae are likely responsible for the strain hardening. After the deformation over the ultimate tensile strength, slip bands initiate and become the major deformation mechanism during necking until fracture. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.; Martensitic transformation and deformation twinning are investigated in Ti-24Nb-4Zr-8Sn (wt. %) alloy with in situ tensile deformation in scanning and transmission electron microscopes. Deformation induced beta to alpha'' martensitic transformation occurs at a stress plateau stage of similar to 200 MPa and deformation twinning takes place subsequently at later strain hardening stage. In situ transmission electron microscopy observations combined with finite element method calculation reveal that three deformation mechanisms, alpha'' martensitic transformation, {112}< 111 >beta deformation twinning and kinks of alpha" lamellae, are activated with the increase of applied stress/strain. Among them, deformation-induced 13 to a" phase transformation dominates the early-stage deformation. As the stress increasing, {112}< 111 >beta deformation twinning is activated and becomes the dominating deformation mechanism afterward. Interactions between dislocation slips and martensite/twin lamellae are likely responsible for the strain hardening. After the deformation over the ultimate tensile strength, slip bands initiate and become the major deformation mechanism during necking until fracture. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
学科主题	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
语种	英语
资助机构	National Natural Science Foundation of China [51390473, 51371177, 51571190, 51271180]
公开日期	2018-01-10
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/79178]
专题	金属研究所_中国科学院金属研究所
通讯作者	Du, K (reprint author), Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China.
推荐引用方式 GB/T 7714	Yao, Tingting,Du, Kui,Wang, Haoliang,et al. In situ scanning and transmission electron microscopy investigation on plastic deformation in a metastable beta titanium alloy[J]. PERGAMON-ELSEVIER SCIENCE LTD,2017,133:21-29.
APA	Yao, Tingting.,Du, Kui.,Wang, Haoliang.,Huang, Zhiye.,Li, Cuihong.,...&Du, K .(2017).In situ scanning and transmission electron microscopy investigation on plastic deformation in a metastable beta titanium alloy.PERGAMON-ELSEVIER SCIENCE LTD,133,21-29.
MLA	Yao, Tingting,et al."In situ scanning and transmission electron microscopy investigation on plastic deformation in a metastable beta titanium alloy".PERGAMON-ELSEVIER SCIENCE LTD 133(2017):21-29.