The dynamic responses of lamellar and equiaxed nearβ-Ti alloys subjected to multi-pass cross rolling

作     者：Wei Chen Hande Wang Y.C.Lin Xiaoyong Zhang Chao Chen Yaping Lv Kechao Zhou Wei Chen;Hande Wang;Y.C.Lin;Xiaoyong Zhang;Chao Chen;Yaping Lv;Kechao Zhou

作者机构：State Key Laboratory of Powder MetallurgyCentral South UniversityChangsha 410083China School of Mechanical and Electrical EngineeringCentral South UniversityChangsha 410083China 

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

年 卷 期：2020年第36卷第8期

页      面：220-229页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 080201[工学-机械制造及其自动化] 

基　　金：financial supports from the National Natural Science Foundation of China(No.51871242) Scientific and technological innovation projects of Hunan Province,China(No.2017GK2292) the National Key R&D Program of China(2018YFB0704100) 

主　　题：Nearβ-Ti alloys Multi-pass cross rolling Dynamic recrystallization {1101}Twinning β-twinning 

摘      要：This work gives a comparison on the microstructural characteristics,textural discrepancies,and twinning behaviors of lamellar and equiaxed nearβ-Ti alloys during multi-pass cross rolling with a rolling reduction of 20%,50%and 80%.The results showed that the restoration mechanism of the alloy inβphase is strongly dependent on theαmorphologies,and in comparison,strain path has weaker influences on the grain refinement of theβ***,the texture intensities of bothαandβphases were weakened owing to the dynamic recrystallization(DRX)of the two phases in the equiaxed ***,with regard to the lamellar microstructure,dynamic recovery(DRV)of theβphase predominated,forming elongatedβ***,theαandβmatrix in lamellar microstructures obeyed the Burgers orientation relationship,which was gradually broken down until the final ***,the{1101}twinning exhibits a strong size *** the continuous DRX ofαphases,theα-twinning is suppressed owing to progressive grain *** activation ofβ-twinning,namely{332}?113?and{112}?111?,in nearβ-Ti alloys is heavily dependent on the deficientβ-stabilizing elements and the local stress *** findings provide an effective way to obtain ultra-fine grain microstructures of this alloy.