钢铁钒钛2025，Vol.46Issue(3)：45-52,8.DOI:10.7513/j.issn.1004-7638.2025.03.008
预应变和热处理对Ti6321合金变形行为的影响
Influence of pre-strain and heat treatment on subsequent deformation behavior of Ti6321 titanium alloy
摘要
Abstract
Pre-tension and heat treatment were performed on the Ti6321 alloy,and their effects on sub-sequent deformation behavior were investigated and compared.The results show that the compressive yield strength of the specimen decreases after pre-tension,and the decrease amplitude increases first and then tends to be stable with the increase of pre-tensile plastic strain.The compressive yield strength of the pre-tensile specimen is restored to a certain extent after heat treatment and then reverse loading,and it is higher than that of the pre-tensile specimen without heat treatment.The recovery amplitude of the compressive yield strength increases with the increase of heat treatment temperature.The mechanism of Bauschinger effect in Ti6321 alloy is the result of the long-range effect of residual stress in the process of micro-zone heterogeneous plastic deformation and the short-range effect of resistance change in the process of dislocation movement,and the former is the main reason.The dislocation configuration of the pre-deformed specimen changes during the heat treatment process,and the formation of subgrains reduces the dislocation density and the degree of dislocation pile-up.On the other hand,the dislocation climbs at high temperature,which leads to stress relaxation,the additional stress between grains decre-ases,and the residual stress in the micro-area decreases.Under the combined action of the two,the reve-rse bearing capacity of the pre-deformed Ti6321 alloy is restored,and the Bauschinger effect is weakened.关键词
Ti6321合金/预拉伸/热处理/包申格效应Key words
Ti6321 alloy/pre-tension/heat treatment/Bauschinger effect分类
矿业与冶金引用本文复制引用
尹艳超..预应变和热处理对Ti6321合金变形行为的影响[J].钢铁钒钛,2025,46(3):45-52,8.基金项目
七二五所科技创新项目(LW230803). （LW230803）
