论文标题
预测应变路径对超低碳钢应变老化行为的影响
Predicting the effect of strain path on the strain aging behaviour of Ultra-low carbon steel
论文作者
论文摘要
最近呈现的模型适应了预测应变路径变化对超低碳（ULC）钢的应变老化（烘烤硬化）行为的影响。通过滚动预先构造的样品是老化的，然后在0、45和90 $^\ circ $ $度以前的滚动方向以单轴张力进行测试。结果表明，衰老不仅改变了材料的屈服强度，还会改变工作硬化速率。产量强度的增加被解释为主要是移动位错密度的降低，这反映了哈恩和其他人的经典思想。与衰老后的扭曲产生的疑虑相比，工作硬化行为的变化被视为是由于溶质“加载”位错起作用的不同作用而产生的。
A recently presented model is adapted to predict the effects of strain path change on the strain aging (bake hardening) behaviour of an ultra low carbon (ULC) steel. Samples pre-deformed by rolling were aged and then tested in uniaxial tension at 0, 45 and 90$^\circ$ degrees to the prior rolling direction. The results show that aging changes not only the yield strength of the material but also the work hardening rate. The increase in yield strength is interpreted to be dominated by a reduction in mobile dislocation density, this reflecting the classic ideas of Hahn and others. The change in work hardening behaviour is treated as arising from the different role played by solute `loaded' dislocations compared to dislocations generated by straining after aging.
