GH4169合金热轧过程流变应力模型  

Flow Stress Model of GH4169 Alloy in Hot Rolling Process

作　　者：袁昆[1] 王鑫[1] 朱俊峰[1] 张立梅[1] 隋凤利[1] YUAN Kun;WANG Xin;ZHU Junfeng;ZHANG Limei;SUI Fengli(School of Metallurgical Engineering, Anhui University of Technology, Ma'anshan 243032, China)

机构地区：[1]安徽工业大学冶金工程学院,安徽马鞍山243032

出　　处：《安徽工业大学学报（自然科学版）》2016年第2期110-113,125,共5页Journal of Anhui University of Technology（Natural Science）

基　　金：国家自然科学基金重点项目(50634030);安徽工业大学研究生创新基金项目(2015137)

摘　　要：以GH4169合金应变温度在950~1100℃，应变速率在0.1~100.0s-1范围的应力-应变曲线为研究对象，基于Arrhenius方程和Zener-Hollomom参数构建合金的流变应力模型，采用此模型对GH4169合金在等温等速压缩过程中变形温度、变形速率、变形程度与流变应力的关系进行数值仿真分析。结果表明，除流变失稳区域(950℃和100.0s-1)的曲线外，在其他应变速率和温度范围，模拟所得应力-应变曲线与实测曲线取得较高的拟合精度，能较好地反映GH4169合金在不同热力学参数下的变形特征。本文构建的流变应力模型适用于合金热轧过程的基于有限元法的数值仿真分析。Based on the stress-strain curves of GH4169 alloy in the temperature range 950-1 100 ℃ and in the strain rate range 0.1- 100.0 s- 1, a flow stress model was established using Arrhenius constitutive equation and Zener-Hollomom parameter, the relation among the temperature, the strain rate, the strain and the flow stress of GH4169 alloy during isothermal constant velocity compression was simulated and analyzed with this model.Results show that except for the curve of the flow instability region at 950 ℃ and 100.0 s- 1, the high fitting accuracy was obtained between the measured and the calculated stress for this model at other strain rate and the deformation temperature, and the deformation characteristics of GH4169 alloy in different process parameters can be better reflected. The flow stress model constructed in this paper can be applied to the numerical simulation of hot rolling process based on finite element method.

关 键 词：GH4169合金 流变应力模型 Arrhenius方程 ZENER-HOLLOMON参数 

分 类 号：TG132.3[一般工业技术—材料科学与工程]