版权所有:内蒙古大学图书馆 技术提供:维普资讯• 智图
内蒙古自治区呼和浩特市赛罕区大学西街235号 邮编: 010021
作者机构:School of Metallurgical EngineeringXi'an University of Architecture and TechnologyXi'an 710055China
出 版 物:《Journal of Wuhan University of Technology(Materials Science)》 (武汉理工大学学报(材料科学英文版))
年 卷 期:2023年第38卷第3期
页 面:689-694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:National Natural Science Foundation of China (No.51474170) Natural Science Foundation of Shaanxi Province (No.2023-JC-YB-312) Key Laboratory Project of Shaanxi Province Educational Committee (No.20JS075)
主 题:ultrafine-grained commercially pure Ti equal channel angular pressing tensioncompression asymmetry texture twinning
摘 要:A homogenous microstructure of ultrafine-grained (UFG) commercially pure (CP) Ti characterized by equiaxed grains/subgrains with an average grain size of about 150 nm and strong prismatic fiber texture were obtained after 4 passes of equal channel angular pressing (ECAP).Tension–compression asymmetry in yield and work hardening behavior of UFG CP Ti were investigated by uniaxial tension and compression *** experimental results reveal that UFG CP Ti exhibits a relatively obvious tensioncompression asymmetry in yielding and work hardening *** basal and prismaticslip are suppressed either for tension or compression,which is the easiest to *** tension twin system{1012} easily activated in compression deformation due to the prismatic fiber texture based on the Schmidt factor,consequently resulting in a lower yield strength under compression than *** can improve the tension-compression asymmetry of CP Ti due to grain *** interaction among the dislocations,grain boundaries and deformation twins are the main work hardening mechanisms for compression deformation,while the interaction between the dislocations and grain boundaries for tension *** twins lead to the higher work hardening under compression than tension.