CAJ | 학술논문

通过Gleeble-3500热模拟实验机得出TC6钛合金在变形温度为860～950℃,应变速率为0.01～50 s~(-1),变形程度分别为30%和50%时的应力-应变曲线.通过金相实验研究了TC6在实验条件下微观组织的演变规律,并建立了TC6在(α+β)两相区塑性变形过程中α相的动态再结晶模型.结果表明:TC6钛合金在低应变速率下变形时,动态回复过程相对增强,动态再结晶受到抑制;相同温度、不同应变速率下的微观组织形貌基本相同,但是随着应变速率的增加冉结晶程度增大,组织细化.模型平均误差小于13%,可以满足预测需要.
통과Gleeble-3500열모의실험궤득출TC6태합금재변형온도위860～950℃,응변속솔위0.01～50 s~(-1),변형정도분별위30%화50%시적응력-응변곡선.통과금상실험연구료TC6재실험조건하미관조직적연변규률,병건립료TC6재(α+β)량상구소성변형과정중α상적동태재결정모형.결과표명:TC6태합금재저응변속솔하변형시,동태회복과정상대증강,동태재결정수도억제;상동온도、불동응변속솔하적미관조직형모기본상동,단시수착응변속솔적증가염결정정도증대,조직세화.모형평균오차소우13%,가이만족예측수요.
The stress-strain curves for TC6 titanium alloy at the deformation temperature of 860 - 950℃,strain rate of 0. 01 - 50 s~(-1),lthe deformation degree of 30%and 50%were obtained through Gieeble-3500 thermal simulation testing machine. The discipline of TC6 microstructure evolution in the experimental conditions was researched through and the dynamic recrystallization model of α-phase plastic during the (α+β) field deformation process was established. The results show that at low strain rate deformation,the dynamic recovery process of TC6 titanium alloy is relatively en-hanced and dynamic recrystallization is inhibited;at the same temperature and different strain rate,the microstructure pattern is basically identical congruent,however,with the increasing of the strain rate,the degree of recrystallization increases and the microstructure refines. The average error value is smaller than 13%by comparing the calculated val-ues and measured values.