科研之友
微信
新浪微博
Facebook
分享链接
摘要
In the present investigation, the application of the Poliak-Jonas criterion in the semi-solid state has been evaluated. The evolution of grains by dynamic recrystallization during semi-solid forming was studied using electron backscatter diffraction (EBSD) analysis. The strain rate in the solid phase for each strain in terms of the overall strain rate, as well as the liquid fraction, was calculated based on the Gurson model. The numerical investigation revealed that the preliminaries of the Poliak-Jonas criterion are almost satisfied in the semi-solid deformation of alloys at low and moderate strain rates. However, there is less reliability regarding the criterion at high values of strain rates, where commonly used in industrial applications.
- 出版日期2017-10
