摘要
在温度为1123~1423 K,应变速率为0.01~10 s^(-1)条件下,对Ti-6Al-2Sn-4Zr-6Mo(Ti6246)合金进行高温热压缩试验。研究温度、应变速率和应变对Ti6246合金高温流变应力的影响规律,建立了该合金考虑应变补偿的Arrhenius本构模型,同时获得了热激活能Q和本构模型中材料参数对应变的响应规律。将模型计算结果与热压缩试验值进行对比发现,预测结果较为准确,其相关系数(R)及平均相对误差(AARE)分别为0.9984和1.71%,表明该合金热变形过程中的流变应力可用构建的应变补偿Arrhenius本构模型来描述。
The isothermal compression tests of Ti-6Al-2Sn-4Zr-6Mo（Ti6246） alloy were conducted under temperature ranges of 1123-1423 K and strain rates of 0.01-10 s^（-1）.The effects of temperature,strain rate and strain on the flow stress of Ti6246 alloy were studied,and the strain compensation Arrhenius constitutive model was developed.At the same time,the thermal activation energy Q and the response mechanism of the material constants of constitutive equation changing with the strain were obtained.The established constitutive model is accurate by comparing the calculated values with the experimented results,the correlation coefficient（R） and the average absolute relative error（AARE） are 0.9984 and 2.53%,respectively.It indicates that the flow stress during hot deformation can be described by the strain compensation Arrhenius constitutive model.
出处
《金属热处理》
CAS
CSCD
北大核心
2016年第8期184-188,共5页
Heat Treatment of Metals
基金
绍兴市公益性技术应用研究项目(2014B70017)
