AZ80半连铸合金热变形过程流变应力及DRX演化数学模型

Pub Date : 1900-01-01 DOI:10.1051/MATECCONF/20166703033

Haicheng Liang, Lijun Feng, Zhongtang Wang

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引用次数: 0

摘要

采用电磁场应用方法，将AZ80镁合金半连续铸造成直径为165 mm的小方坯。在Gleeble 2000热模拟机上，对AZ80镁合金半连铸在260 ~ 410℃、应变速率0.001 ~ 10s-1条件下热压缩过程中的动态再结晶(DRX)演化进行了实验研究。发现动态再结晶是主要的组织演变，并分析了变形工艺参数对DRX演变的影响。建立了DRX临界再结晶模型、动力学模型和粒度模型等数学模型，实验结果与模型吻合较好。

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Flow Stress and Mathematical Model for DRX Evolution of Semi-continuous Cast AZ80 Alloy During Hot Deformation

Using electromagnetic fields application ways, AZ80 magnesium alloy is semi-continuously cast into billets with diameter of 165 mm. And the dynamic recrystallization (DRX) evolution of the semi-continuous cast AZ80 magnesium alloy during hot compression has been experimentally studied on Gleeble 2000 thermal-mechanical simulator, at temperatures from 260 to 410 °C and strain rates from 0.001 to 10s-1. It is found that the chief microstructure evolution is dynamic recrystallization, and the effect of deformation process parameters on DRX evolution is analyzed. The mathematical models including critical recrystallization model, kinetics model and grain size model of DRX are established and the results show good agreement between experiments and the models.

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