摘要
通过单向拉伸试验研究了AZ31镁合金和DP980高强钢两种轻型材料的电塑性效应,研究表明:AZ31镁合金存在纯电塑性效应,而DP980高强钢不存在明显的纯电塑性效应。通过分析峰值电流密度和频率对AZ31镁合金流动应力的影响规律,在Fields-Backofen模型基础上建立了考虑电塑性效应的流动应力方程,此方程能很好的拟合小变形阶段的流变行为。
The electroplastic effect of AZ31 alloy and DP980 AHSS was studied by uniaxial tensile tests. The research result show that pure electroplastic effect exists in AZ31 alloy, but does not exist in DP980 AHSS. The influence of peak current density and frequency on the flow stress was analyzed, and a flow stress equation model considering the electroplastic effect of AZ31 alloy was established based on Fields-Backofen model. The results of proposed model coincide with experimental results, especially in small deformation stage.
出处
《热加工工艺》
CSCD
北大核心
2015年第4期31-36,共6页
Hot Working Technology
基金
国家自然科学基金资助项目(51275297)
教育部博士点专项基金资助项目(20100073110044)
