Predicting Critical Conditions and Stress-Strain Curves for Dynamic Recrystallization in SPHC Steel

作     者：WU Lai-zhi LI Xue-song CHEN Jun ZHANG Hong-bing CUI Zhen-shan 

作者机构：Department of Plasticity Technology Shanghai Jiaotong University Shanghai 200030 China 

出 版 物：《Journal of Iron and Steel Research International》 (国际钢铁研究杂志)

年 卷 期：2010年第17卷第7期

页      面：51-57页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：Item Sponsored by National Natural Science Foundation of China(50675133) National Basic Research Program of China(973 Program)(2006CB705401) 

主　　题：flow stress dynamic recrystallization critical stress critical strain SPHC steel 

摘      要：The hot compression tests on an SPHC steel were carried out in the temperature range of 900-1150 ℃ and strain rate range of 0.1-10 s-1,in which the maximum true strain is *** activation energy of test steel was calculated,to be 299.4 kJ/*** critical stresses and strains for initiation of dynamic recrystallization were determined based on changes of the work hardening rate（θ）as a function of the flow stress（σ）or strain（ε）,*** dependence of the peak strain（εp）,the peak stress（σp）,and the steady state stress（σs）were determined based on the Zener-Hollomen *** mathematical models of the flow stress evolution were established in the hardening and dynamic recovery region and dynamic recrystallization region,*** average error between experimental curves and predicted ones was around 3.26%.