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

IMR OpenIR

	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.
	2017-07-01
发表期刊	PERGAMON-ELSEVIER SCIENCE LTD
ISSN	1359-6454
卷号	133 页码:21-29
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.
部门归属	[yao, tingting ; du, kui ; wang, haoliang ; huang, zhiye ; li, cuihong ; li, linlin ; hao, yulin ; yang, rui ; ye, hengqiang] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, liaoning, peoples r china
关键词	In Situ Tem Titanium Alloys Deformation Twinning Martensitic Transformation Deformation Mechanism Strain Hardening
学科领域	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
资助者	National Natural Science Foundation of China [51390473, 51371177, 51571190, 51271180]
收录类别	SCI
语种	英语
WOS记录号	WOS:000407413100003
引用统计	被引频次：98[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/321006/79178
专题	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.