期刊
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
卷 24, 期 12, 页码 5002-5012出版社
SPRINGER
DOI: 10.1007/s11665-015-1734-4
关键词
aluminum alloy; constitutive modeling; flow stress; processing maps
资金
- National Natural Science Foundation of China [51405268, 51375270]
- Encouragement Foundation for Young Scholars of Shandong Province [BS2014ZZ001]
- Shandong Postdoctoral Creative Foundation [201402025]
The isothermal hot compression tests of as-cast and homogenized 2024 aluminum alloy were carried out under wide range of deformation temperatures (623-773 K) and strain rates (0.001-10 s(-1)). The constitutive equations for both initial states were established based on Arrhenius model, and the processing maps were constructed based on the dynamic material model. The results show that the flow stress of samples is evidently affected by both the strain rate and deformation temperature, and the flow stress in homogenized state is always higher than that in as-cast state. Through calculating the correlation coefficient (R) and average absolute relative error of the established constitutive equations, it indicates that Arrhenius model can only provide a rough estimation on the flow stress. However, a much more precise value of the flow stress was obtained by introducing the strain compensation into Arrhenius model, since the effects of strain on the material constants were well considered. Furthermore, according to the processing maps, a suggested range of deformation temperature and strain rate for hot forming process were given then: temperature range 710-773 K and strain rate range 0.001-1 s(-1) for as-cast state, and temperature range 680-773 K and strain rate range 0.003-0.22 s(-1) for homogenized state.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据