中南大学学报（自然科学版）2017，Vol.48Issue(6)：1439-1447,9.DOI:10.11817/j.issn.1672-7207.2017.06.005
300M高强钢高温流变行为及本构方程
Flow behaviors and constitutive model of 300M high strength steel at elevated temperature
摘要
Abstract
In order to study the effect of deformation temperature and strain rate on the flow stress of 300M high strength steel,isothermal hot compression was tested by Gleeble 3500 thermal simulation machine under environment with temperatures varying from 900 to 1 150 ℃ and strain rates ranging from 0.01 to 10 s-1.The constitutive equation of 300M steel was established on the empirical models.The results show that deformation temperature and strain rate have a significant influence on the flow stress behavior of 300M steel.The material flow stress increases with the decreases of deformation temperature and the increase of strain rate.A nonlinear quadrinomial function is proposed to define the relationship between material constants α,n,ln A and activation energy Q and strain.The predicted flow stress values using the proposed constitutive equation have a good agreement with the experimental values,which illustrates that the established constitutive equation can accurately describe the rheological behavior of 300M steel on deformation conditions.关键词
300M高强钢/热变形行为/本构方程/误差分析Key words
300M high strength steel/thermal deformation behaviors/constitutive model/deviation analysis分类
矿业与冶金引用本文复制引用
章晓婷,黄亮,李建军,张轩越,曾嵘,李蓬川..300M高强钢高温流变行为及本构方程[J].中南大学学报（自然科学版）,2017,48(6):1439-1447,9.基金项目
国家自然科学基金资助项目(51435007) （51435007）
欧盟第七框架居里国际人员交流研究项目(318968)(Project(51435007) supported by the National Natural Science Foundation of China （318968）
Project(318968) supported by the EC FP7 Marie Curie Actions-International Research Staff Exchange Scheme) （318968）
