半固态ZL101合金触变成形的本构关系  

Constitutive relationship of semi-solid ZL101 alloy in thixoforming

作　　者：陈少东[1] 于沪平[1] 申昱[1] 颜震[1] 夏松颖[1] 

机构地区：[1]上海交通大学材料科学与工程学院,塑性成形技术与装备研究院,上海200030

出　　处：《塑性工程学报》2013年第3期82-86,共5页Journal of Plasticity Engineering

基　　金：国家自然科学基金重点资助项目(50835002);国家自然科学基金资助项目(50975174);教育部博士点基金资助项目(200802480053)

摘　　要：对半固态ZL101合金坯料进行等温压缩实验,研究变形温度、应变速率对半固态ZL101合金流动应力的影响。结果表明,半固态ZL101合金的流动应力随着变形温度的升高而降低,随着应变速率的增大而增大。DOE实验表明,应变速率对材料的流动应力影响较大。采用遗传算法对半固态等温压缩实验数据进行拟合,得到ZL101合金的本构关系,并将其导入到有限元程序中进行计算,模拟结果与实验结果基本吻合。The isothermal compression experiment was applied on the semi-solid ZL101 alloy. The results show that the flow stress decreases with the increase of the temperature and the decrease of the strain rate. The orthogonal experiment analysis has shown that the strain rate has a great influence to the flow stress of the semi-solid ZL101 alloy. The constitutive equation was es- tablished with the help of the genetic algorithm （GA）. The finite element simulation results have shown the agreement with the experiment results.

关 键 词：半固态 ZL101合金 触变成形 遗传算法 本构关系 

分 类 号：TG316[金属学及工艺—金属压力加工]