摘要
采用有限元模拟技术研究了 Ti- 6 Al- 4 V合金热挤压变形过程 ,并将所得的结果与实验结果进行了比较。通过模拟计算获得了在不同挤压变形条件下 ,变形区的应力、应变和温度的分布规律。结果表明 ,在钛合金的挤压变形过程中 ,由变形而引起的温升显著 ,最高可达 16 0℃。温升主要集中在挤压过程的前期阶段。由于温升引起流变应力下降 ,从而导致变形区的扩展。
Hot extrusion of Ti-6Al-4V alloy has been studied using finite element simulation and the results are verified with those obtained experimentally.Teh distribution of strain,temperature and effective stress has been simulated under different processing conditions.Simulation results show that heat generation due to deformation is significant (as much as 160℃) in the hot extrusion of Ti alloys,and it mainly occurs at the beginning of the extrusion process.This leads to reduction in flow stress which,in turn,leads to enlarged deformation zone.
出处
《热加工工艺》
CSCD
北大核心
2003年第1期39-41,共3页
Hot Working Technology
关键词
钛合金
热挤压
有限元模拟
hot extrusion
Ti alloy
finite element
simulation
