In-situ microstructural investigations of the TRIP-to-TWIP evolution in Ti-Mo-Zr alloys as a function of Zr concentration

作     者：Bingnan Qian Jinyong Zhang Yangyang Fu Fan Sun Yuan Wu Jun Cheng Philippe Vermaut Frederic Prima Bingnan Qian;Jinyong Zhang;Yangyang Fu;Fan Sun;Yuan Wu;Jun Cheng;Philippe Vermaut;Frédéric Prima

作者机构：Chimie ParisTechPSL UniversityCNRSInstitut de Recherche de Chimie Paris75005 PahsFrance School of Material Science and EngineeringChina University of Mining and TechnologyXuzhou Jiangsu 221008China State Key Laboratory of Solidification ProcessingNorthwestern Polytechnical UniversityXi'anShaanxi 710072China State Key Laboratory for Advanced Metals and MaterialsUniversity of Science and Technology BeijingBeijing 100083China Northwest Institute for Non-ferrous Metal ResearchShaanxi Key Laboratory of Biomedical Metal MaterialsXi'an 710016China Sorbonne UniversitiesUPMC University ParisUFR92675005 ParisFrance 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2021年第65卷第6期

页      面：228-237页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by National Natural Science foundation of China(Grant No.51601216 and 51901193) China Postdoctoral Science Foundation(Grant No.2018M632414) Fund of State Key Lab of Advanced Metals and Materials,University of Science and Technology Beijing(Grant No.2019-ZD03) Fundamental Research Funds for the Central Universities(Grant No.2017XKQY009) Funds of Industry-University-Research Cooperation in Jiangsu Province(Grand No.BY2018075) Key Research and Development Program of Shaanxi(Grant No.2019GY-151) sponsored by China Scholarship Council 

主　　题：Metastable beta(β)Ti-alloys TRIP/TWIP effects Deformation mechanisms In-situ traction-EBSD TEM observation 

摘      要：Aiming at overcoming the strength-ductility trade-off in structural Ti-alloys,a new family of TRIP/TWIP Ti-alloys was developed in the past decade(TWIP:twinning-induced plasticity;TRIP:transformationinduced plasticity).Herein,we study the tunable nature of deformation mechanisms with various TWIP and TRIP contributions by fine adjustment of the Zr content on ternary Ti-12 Mo-xZr(x=3,6,10)*** microstructure and deformation mechanisms of the Ti-Mo-Zr alloys are explored by using in-situ electron backscatter diffraction(EBSD)and transmission electron microscopy(TEM).The results show that a transition of the dominant deformation mode occurred,going from TRIP to TWIP major mechanism with increasing Zr *** the Ti-12 Mo-3 Zr alloy,the stress-induced martensitic transformation(SIM)is the major deformation mode which accommodates the plastic *** the Ti-12 Mo-6 Zr alloy,the combined deformation twinning(DT)and SIM modes both contribute to the overall plasticity with enhanced strain-hardening rate and subsequent large uniform *** increase of the Zr content in Ti-12 Mo-10 Zr alloy leads to an improved yield stress involving single DT mode as a dominant deformation mechanism throughout the plastic *** the present work,a set of comprehensive in-situ and ex-situ microstructural investigations clarify the evolution of deformation microstructures during tensile loading and unloading processes.