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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.
2017-07-01
Source PublicationPERGAMON-ELSEVIER SCIENCE LTD
ISSN1359-6454
Volume133Pages:21-29
AbstractMartensitic 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.
description.department[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
KeywordIn Situ Tem Titanium Alloys Deformation Twinning Martensitic Transformation Deformation Mechanism Strain Hardening
Subject AreaMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding OrganizationNational Natural Science Foundation of China [51390473, 51371177, 51571190, 51271180]
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/79178
Collection中国科学院金属研究所
Corresponding AuthorDu, K (reprint author), Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China.
Recommended Citation
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.
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