论文部分内容阅读
阐述了高温塑性变形引起的非平衡晶界偏聚的准热力学和动力学,并使用该模型预测了低合金结构钢中高温塑性变形导致的P在奥氏体晶界的非平衡偏聚.研究发现:当变形为20%,应变速率为1×10-3s-1时,在800℃左右会出现一个P的晶界偏聚浓度峰值;在1000℃变形为20%时,晶界偏聚浓度随着应变速率的增加而增加.预测结果与现有的实验结果基本一致.
The quasi-thermodynamics and kinetics of non-equilibrium segregation of grain boundaries caused by high temperature plastic deformation are described, and the model is used to predict the non-equilibrium segregation of P at the austenite grain boundaries caused by high temperature plastic deformation in low alloy structural steels. It is found that when the deformation is 20% and the strain rate is 1 × 10-3s-1, a grain boundary segregation concentration peak of P will appear at about 800 ℃. When the deformation is 20% at 1000 ℃, the concentration of grain boundary segregation With the increase of strain rate, the prediction results are basically consistent with the existing experimental results.