摘要
从晶粒尺寸角度出发,提出晶粒形变度的概念,建立了一个用以描述金属材料热变形行为的数学模型,具有精度高、简单直观、受分界点影响小且计算曲线连续等优点.该模型具有一定微观物理基础,既能描述动态再结晶前的强化阶段,又能描述动态再结晶后软化阶段的热变形流变应力.对两种结构钢的热变形流变应力进行了计算,并与试验值及其他模型的计算结果进行了比较.
From the view of grain size, a concept of grain distortion degree (GDD) was brought forward. And a mathematical model was established to describe the flow stress during the hot deformation of structural steels, which possesses some physical basis as well as applicability to the factual process. It can calculate the flow stress not only before the occurrence of dynamic recrystallization when flow stress is hardening, but also after that when the flow stress is softening. The flow stress of two kinds of structural steel was calculated, and the results were compared with the experimental data and other models'.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2003年第10期1497-1500,共4页
Journal of Shanghai Jiaotong University
基金
国家自然科学基金资助项目(50075053)
关键词
晶粒形变度
流变应力
数学模型
结构钢
grain distortion degree
flow stress
mathematical model
structural steel
