Deformation mechanism of commercially pure titanium under biaxial loading at ambient and elevated temperatures

作     者：Yuanjie Fu Yao Cheng Yun Cui Yunchang Xin Yuyao Zeng Xiao Liu Gang Chen Yuanjie Fu;Yao Cheng;Yun Cui;Yunchang Xin;Yuyao Zeng;Xiao Liu;Gang Chen

作者机构：School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300350China Key Laboratory for Light-weight MaterialsNanjing Tech UniversityNanjingJiangsu 210009China School of Chemical Engineering and TechnologyTianjin Ren’ai CollegeTianjin 301636China Tianjin Key Laboratory of Chemical Process Safety and Equipment TechnologyTianjin 300350China Zhejiang Institute of Tianjin UniversityNingboZhejiang 315201China Nuclear Power Institute of ChinaChengduSichuan 610015China 

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

年 卷 期：2022年第126卷第31期

页      面：237-251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：support from the National Key R&D Program of China(No.2020YFA0405901),National Natural Science Foundation of China(No.51875398),the Sichuan Science and Technology Program(No.2019ZDZX0001) the Science and Technology on Reactor System Design Technology Laboratory,Nuclear Power Institute of China.In addition,we would like to thank Zhejiang Institute of Tianjin University,Ningbo 

主　　题：CP titanium Biaxial tensile tests High temperature Dislocation glide TEM 

摘      要：Commercially pure(CP)titanium is thermally processed and subjected to biaxial ***,the evolution of the microstructural deformation mechanisms under such circumstances is not adequately *** this study,the mechanical responses and microstructural deformation mechanisms of TA2 CP titanium sheets under equi-biaxial loading at room temperature(RT),300℃,and 400℃were *** activated slip and twinning systems were investigated by transmission electron microscopy(TEM)after polished cruciform specimens were biaxially tensile-tested at RT and elevated *** results show that{11¯22}contraction twinning and{10¯12}extension twinning are the main deforma-tion mechanisms of RT biaxial deformation,while dislocation glide is predominant in biaxial deformation at 300℃and 400℃.This difference yields varied work-hardening behaviors at RT and elevated *** biaxial deformation at 400℃,the main slip trace type is multiple *** interaction of different slip systems in multiple slip created shear deformation concentration areas and further induced ***,in biaxial deformation at 300℃,the amounts of simplex and multiple slip were significantly reduced compared to those at 400℃because the lower temperature increased the critical resolved shear stress and insufficient activated slip systems were available for grain ***-fore,several stress-concentration areas were generated with the activation of cross-slip.