首页|Investigation of the relationship between microstructural evolution and mechanical properties in a metastable β-ZrTiAlV alloy
Investigation of the relationship between microstructural evolution and mechanical properties in a metastable β-ZrTiAlV alloy
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NSTL
Elsevier
? 2022 Elsevier B.V.In this study, the relationship between microstructural evolution and mechanical properties of a metastable β-ZrTiAlV alloy during compression was investigated. Microstructure characterization revealed that three different morphologies of α′ martensite, 101ˉ2 twinned α′ martensite, untwinned α′ martensite and α′ martensite paired were triggered at the initial deformation stage. With increasing deformation strain, these three kinds of α′ martensite undergo a process of widening and merging, and eventually form the 101ˉ2twin-related α′ domains, normal α′ domains and connected α′ domains, respectively. Mechanical properties test shows that the alloy exhibits a relatively high yield strength of 900 MPa and a high work hardening rate (about 6000 MPa) during compression. This high yield strength is attributed to the high triggering stress of deformation-induced β to α′ martensite transformation at initial deformation stage and the high solid solution strengthening effect of large amount Ti. The activation of α′ martensite and 101ˉ2 internal twins brings about the transformation induced plasticity (TRIP) and twinning induced plasticity (TWIP) effects, giving the alloy a substantial high work hardening rate, and their evolution with increasing strain leads to nonlinear evolution of the work hardening rate.
Mechanical propertiesMetastable β-ZrTiAlV alloyMicrostructural evolutionTWIP and TRIP effects
Liao Z.、Jing R.、Ai T.T.、Fu W.、Liu T.、Sun Q.
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School of Materials Science and Engineering Shaanxi University of Technology
State Key Laboratory for Mechanical Behavior of Materials School of Materials Science and Engineering Xi'an Jiaotong University
Southwest Aluminum (Group) Co. Ltd.
Key Laboratory of Advanced Technologies of Materials (Ministry of Education) School of Material Science and Engineering Southwest Jiaotong University
NSTL
Elsevier
