摘要
在温度为473623 K、应变速率为0.1 s-10.001 s-1的条件下对7B04-T6铝合金板材进行温拉伸实验,研究该材料在所选定温度和应变速率下的流变应力变化数据。分别对Fields and Backofen方程和加入软化因子＂s＂的流变应力数学方程进行修正,建立该材料的两个流变应力数学模型。两模型中,Fields and Backofen模型在峰值应力之前能更好地反映流变应力的变化;加入软化因子的流变应力模型在峰值应力之后软化阶段能更好地反映流变应力的变化。
The flow stress of 7B04-T6 aluminum alloy sheet in the selected temperature and strain rate is learned based on warm tensile tests which were carried out in the temperature ranging from 473 K to 623 K and the strain rate ranging from 0.1 s-1to 0.001 s-1.Two flow stress mathematical models of this material were established by modifying the Fields-Backofen equation and the flow stress mathematical equation containing a softening factor ＂s＂.By comparing the two models,the Fields-Backofen model fit the flow stress better before the peak stress,the flow stress model containing a softening factor fit the flow stress better in the softening stage after the peak stress.
出处
《金属功能材料》
CAS
2011年第2期51-55,共5页
Metallic Functional Materials
关键词
铝合金
温拉伸
流变应力
aluminum alloy
warm tensile
flow stress
