楔横轧韧性损伤模型中Zener-Hollomon参数的确定  

The determination of Zener-Hollomon parameter in ductile damage criteria

作　　者：陶新刚[1] 徐春国[1] 刘桂华[1] 

机构地区：[1]北京机电研究所,北京100083

出　　处：《塑性工程学报》2011年第1期76-80,共5页Journal of Plasticity Engineering

摘　　要：为将温度和应变速率耦合到现存的韧性断裂准则中，文章利用Glecblc3500热模拟机对45钢进行压缩实验，采用最小二乘法计算Zener-Hollomon参数中的变形激活能Q，得到了45钢在温度1050℃～1200℃、应变速率1s^-1-100s^-1下的材料流动应力方程，不仅为韧性损伤模型的建立奠定了基础。而且可为应用韧性断裂准则模拟楔横轧心部缺陷的有限元模拟中的材料模型，提供基础数据。In order to establish the ductile damage criteria coupled Zcner-Hollomon parameter, the deformed active energy had been calculated by using the data of 45 steel gained from the compression experiment with Glecblc3500, which laid the foundation for establishing the ductile damage criteria. Meanwhile, the formula of flow stress was determined for the 45 steel model to FEM simulate the central defect of material with ductile damage criteria during cross wedge rolling.

关 键 词：韧性损伤准则 ZENER-HOLLOMON参数 变形激活能 流动应力方程 

分 类 号：TG335.19[金属学及工艺—金属压力加工]