基于修正Johnson-Cook本构模型的奥氏体不锈钢高温流变行为  

High Temperature Rheological Behavior of Austenitic Stainless Steel Based on Modified Johnson-Cook Constitutive Model

作　　者：邬宇轩 刘朋成 冯海涛 卢晓禹 徐涛 王俊刚[1] 郝娟娟 Wu Yu-xuan;Liu Peng-cheng;Feng Hai-tao;Lu Xiao-yu;Xu Tao;Wang Jun-gang;Hao Juan-juan(Technical Center of Inner Mongolia Baotou Steel Union Co.,Ltd.,Baotou 014010,Inner Mongolia Autonomous Region,China)

机构地区：[1]内蒙古包钢钢联股份有限公司技术中心,内蒙古包头014010

出　　处：《包钢科技》2023年第4期6-10,共5页Science & Technology of Baotou Steel

摘　　要：文章研究了修正的Johnson-Cook(m-JC)本构模型对304奥氏体不锈钢高温流变行为的表征能力。利用不同温度、应变和应变速率等温热压缩试验的试验真应力-应变数据来计算本构模型的材料常数,建立了关于304奥氏体不锈钢的m-JC本构模型。通过比较预测结果的相关系数、平均相对误差以及均方差,评估了模型的适用性。结果表明,修正的JC模型预测结果和试验结果之间的平均相对误差绝对值为6.77%,相关系数为0.987,均方差为11.2 MPa,m-JC本构模型可以较为准确的描述304奥氏体不锈钢的流变行为。In the paper,the representational capacity of modified Johnson-Cook(m-JC)constitutive model on the high temperature rheological behavior of 304 austenitic stainless steel is studied.The material constants of constitutive model are calculated with the data of experimental true stress-strain for isothermal compression test at different temperatures,strains and strain rates so that the m-JC constitutive model of 304 austenitic stainless steel is established.The applicability of the model is evaluated by comparing the correlation coefficient,average relative error and mean square error of predicted results.The results showed that the average absolute relative error between the predicted results and experimental results of m-JC model was 6.77%,correlation coefficient was 0.987 as well as mean square error was 11.2 MPa so that the m-JC constitutive model could more accurately describe the rheological behavior of 304 austenitic stainless steel.

关 键 词：304奥氏体不锈钢 变形行为 修正的Johnson-Cook模型 本构方程 流变应力 

分 类 号：TG142.71[一般工业技术—材料科学与工程]