基于Hansel-Spittel模型的齿环用HAl61-4-3-1合金本构模型构建

Construction of High-temperature Constitutive Model of HAl61-4-3-1 Alloy for Synchronizer Ring Based on Hansel-Spittel Mode

采用Gleeble3500热模拟实验机对齿环用HAl61-4-3-1合金进行单道次压缩实验,研究了其在600~800℃和应变速率0.01~10 s-1条件下的流变应力行为;根据真应力-应变曲线,基于Hansel-Spittel模型构建该合金的本构模型,并进行统计学和有限元模拟验证。结果表明:该合金流变应力值与温度、应变速率和变形量之间成非线性关系,与变形温度呈负相关、与应变速率呈正相关;基于Hansel-Spittel本构模型的预测值与实验结果吻合良好,平均相对误差为6.0428%,相关系数为0.9941,模型可准确地预测该材料的流变应力;数值模拟的力-位移曲线与实验结果曲线基本吻合,总误差为4.6%,为后续齿环的精密塑性成形有限元模拟提供数据支撑。

The single-pass compression test of HAl61-4-3-1 alloy for synchronizer ring was carried out using a Gleeble 3500 thermo-simulation machine,and the flow stress behavior at deformation temperature of 600~800℃and strain rate of 0.01~10 s-1 was investigated.Based on true stressstrain curves,the flow stress constitutive model of the alloy was established by Hansel-Spittel model,and was verified by statistical and finite element simulation.The results show that the flow stress of HAl61-4-3-1 alloy has a nonlinear relationship with temperature,strain rate and strain.Furthermore,its flow stress value increases with the increasing strain rate and decreasing deformation temperature.The predictions based on the Hansel-Spittel constitutive model agree well with the experimental results.The average absolute relative error(AARE)is 6.0428%and the correlation coefficient is0.9941.The model could predict the flow stress of HAl61-4-3-1 alloy accurately.The total error is4.6%,which provides data support for the follow-up finite element simulation of precision plastic forming of gear ring.