摘要
The microstructure and mechanical properties of the TB8 titanium alloy were controlled by a secondary processing technology of solution-equal channel angular pressing(ECAP)-aging treatment,which combined strong plastic deformation with heat treatment. The effects of ECAP and heat treatment on the microstructure and properties of the titanium alloy were systematically investigated by optical microscopy(OM), scanning electron microscopy(SEM), hardness tests, and tensile property analysis. The results indicate that the metallographic structure without ECAP treatment is mainly equiaxed β-phase, while that after ECAP treatment is equiaxed β-phase with grain fragmentation, slip bands, and new small grains. After 850 ℃ solutionECAP-520 ℃ aging treatment, the titanium alloy has the smallest grain size, while the directionality of tissue growth along the ECAP direction is the most apparent. Under the same solution-aging conditions, the hardness of the titanium alloy increases from 431.5 to 531.2 HV compared to that without ECAP treatment, i e, increases by 23.11%, and the tensile strength increases from 1 045.30 to 1 176.25 MPa, i e, increases by 12.5%.
作者
陈枫华
许晓静
LIU Yangguang
HU Chaoxing
CAO Bin
BAI Xiang
CHEN Fenghua;XU Xiaojing;LIU Yangguang;HU Chaoxing;CAO Bin;BAI Xiang(Institute for Advanced Manufacturing and Modern Equipment Technology,Jiangsu University,Zhenjiang 212013,China)
基金
the Key R&D Plan of Zhenjiang in 2018 (No.GY2018021)。
作者简介
陈枫华:E-mail:chenfenghua97@163.com;Corresponding author:许晓静:Prof.,Ph D,E-mail:yjs_xx@126.com。
