摘要
在变形温度分别为750,800,850,900,950,1000和1050℃,应变速率分别为0.001,0.01,0.1和1s^(-1)的条件下,对TA15钛合金进行了热压缩试验,分析了变形温度和应变速率对流动应力的影响。根据试验结果,计算了变形过程的温升,表明变形热所导致的温升大小与应变速率和应变均成正比,在T=750℃,ε=1s^(-1)的低温高应变速率条件下所产生的温升最大,可以达到122.63℃。基于Sellars-Tegart本构模型,建立了TA15钛合金热变形时的本构模型。
The hot compression tests for TA15 titanium alloy were conducted at 0.001 s^-1～1 s^-1 strain rates and 750-1050 ℃ temperatures.The effect of deformation temperature and strain rate on the flow stress was analyzed.According to the test results,the temperature rise in the deformation process was calculated.Results show that the temperature rise caused by deformation heat is proportional to strain rate and strain.The maximum temperature rise 122.63 ℃ is produced at the low temperature 750 ℃ and high strain rate 1 s^-1,Finally,the constitutive model was established for the microstructure evolution of TA15 titanium alloy during hot deformation based on Sellars-Tegart constitutive model.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2017年第2期399-405,共7页
Rare Metal Materials and Engineering
基金
高档数控机床与基础制造装备科技重大专项(2012ZX04012-011)
关键词
TA15钛合金
热变形
应力应变曲线
本构模型
TA15 titanium alloy
hot deformation
stress strain curve
constitutive model
