Effect of Carbon on Dynamic Recrystallization Behavior of Vanadium Microalloy Steels
The hot working behavior especially dynamic recrystallization of low-carbon and medium-carbon vanadium microalloy steels has been studied by performing isothermally compression tests and Avrami analysis. The Avrami plots of the two experiment steels have been constructed based on flow stress curves following a new approach (Jonas, et al.Acta Mater., 2009, 57(2): 2748-2756; Wu et al, Acta Metall. Sin., 2010, 46(7): 838-843). It is experimentally found that the carbon effect on dynamic recrystallization is opposite to each other in lower and higher strain ranges: Carbon causes a softening effect at low strain rates (0.01, 0.1, and 1.0 s-1), and a hardening effect at high strain rates (10.0 and 30.0s-1).Correspondingly, carbon promotes the dynamic recrystallization at low strain rates and retards the dynamic recrystallization at high strain rates in the experimental steels. The phenomenon is then tentatively explained based on the possible mechanisms of dynamic process at different strain rates.
vanadium microalloy steels hot working dynamic recrystallization carbon strain rate Avrami modeling
LIU Guo-quan ZHAO Hai-tao WU Jin-bin WANG Cheng-yang XU Lei
School of Materials Science and Engineering,University of Science and Technology Beijing, Beijing 10 School of Materials Science and Engineering,University of Science and Technology Beijing, Beijing 10 School of Materials Science and Engineering,University of Science and Technology Beijing, Beijing 10 School of Materials Science and Engineering,University of Science and Technology Beijing, Beijing 10
国际会议
The 6th International Conference on High Strength Low Alloy Steels(第六届高强度低合金钢国际会议HSLA Steels2011)
北京
英文
432-437
2011-05-31（万方平台首次上网日期，不代表论文的发表时间）