摘要
采用Gleeble-1500热模拟试验机对V和Nb两种微合金化中碳钢进行了温度范围为900~1100℃,应变速率范围为0.01~10 s^(-1)的热压缩实验。采用基于蠕变理论的物理方法研究了两种实验钢的本构方程,该方程考虑了杨氏模量E和奥氏体的自扩散系数D对温度的依赖关系。通过使用相关系数r和平均绝对相对误差e_(AARE)等统计参数对方程的准确性和可靠性进行了量化。结果表明,该基于蠕变理论的物理本构方程不仅能准确地描述钒微合金化和铌微合金化中碳钢的峰值应力,而且可以准确地描述所有应变范围内的应力。
The hot compression experiments of two micro-alloyed medium carbon steels of vanadium and niobium were carried out at the temperature of 900-1100℃and strain rate of 0.01-10 s^(-1) using Gleeble-1500 thermal simulator.The constitutive equations of the two experiment steels were investigated by the physical method based on creep theory,and the dependence relationship of the Young′s modulus E and the self-diffusion coefficient D of austenite on temperature was taken into account in the equation.The accuracy and reliability of the equations were quantified by employing statistical parameters of correlation coefficient r and average absolute relative error e_(AARE).The results show that the physical constitutive equation based on creep theory can not only accurately describe the peak stress of vanadium micro-alloyed and niobium micro-alloyed medium carbon steels,but also accurately describe the stress in all strain ranges.
作者
魏海莲
邓笑举
潘红波
王永强
李维火
WEI Hai-lian;DENG Xiao-ju;PAN Hong-bo;WANG Yong-qiang;LI Wei-huo(Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials,Ministry of Education,Anhui University of Technology,Maanshan 243002,China;School of Materials Science and Engineering,Anhui University of Technology,Maanshan 243002,China;Key Laboratory of Metallurgical Emission Reduction and Resources Recycling of Ministry of Education,Anhui University of Technology,Maanshan 243002,China)
出处
《塑性工程学报》
CAS
CSCD
北大核心
2022年第9期207-215,共9页
Journal of Plasticity Engineering
基金
国家自然科学基金资助项目(51774006
51971003)
安徽省自然科学基金资助项目(2008085QE279)
先进金属材料绿色制备与表面技术教育部重点实验室主任基金资助项目(GFST2022ZR05)。
关键词
微合金化中碳钢
热压缩
流变应力
物理本构方程
micro-alloyed medium carbon steels
hot compression
flow stress
physical constitutive equation
