Experimental Investigation and Modeling of Dynamic Recrystallization

对动态再结晶过程中的微观组织、织构和流变应力演化进行了实验和理论研究。实验程序将包括高温力学测试和快速淬火相结合，以记录再结晶早期和晚期的流变应力发展和显微组织和织构演变。特别是，应变路径的变化将用于揭示动态再结晶的机制。本研究将在变分理论的基础上进行数学建模的尝试，建立一个基于物理的DRX模型，对DRX的流变应力行为、起爆和稳态方法具有预测能力。为了进一步利用以往的可靠数据，本研究将对铜和合金800H进行研究。

It is proposed to conduct an experimental and theoretical study of microstructure, texture, and flow stress evolution during dynamic recrystallization (DRX). The ex- perimental program will comprise high temperature mechanical testing combined with fast quenching to record the flow stress development and microstructure and texture evolution during early and advanced stages of recrystallization. In particu- lar, strain path changes will be carried out for revealing the mechanisms of dynamic recrystallization. The study will be accompanied by a mathematical modeling at- tempt on the basis of variational theory to develop a physics based DRX model with predictive power on flow stress behavior, initiation and steady state approach of DRX. The study will be carried out on copper and alloy 800H to further utilize previous reliable data.