CAJ | 학술논문

在Gleeble-1500热模拟试验机和UTM5305实验机上以不同的变形条件对AZ31镁合金进行高温热变形试验，研究该材料在高温热变形过程中的真应力应变。研究结果证明：在变形过程中的AZ31镁合金的真应力随应变速率增大、变形温度降低而升高。在压缩变形过程中的真应力峰值、真应变和动态再结晶与拉伸变形过程相比有明显差异；该镁合金热变形过程中的真应力为用包含Arrhenius项的Zener-Hollomon参数来描述，其压缩拉伸变形激活能分别为132.38 kJ/mol和Q＝255.26 kJ/mol.
재Gleeble-1500열모의시험궤화UTM5305실험궤상이불동적변형조건대AZ31미합금진행고온열변형시험，연구해재료재고온열변형과정중적진응력응변。연구결과증명：재변형과정중적AZ31미합금적진응력수응변속솔증대、변형온도강저이승고。재압축변형과정중적진응력봉치、진응변화동태재결정여랍신변형과정상비유명현차이；해미합금열변형과정중적진응력위용포함Arrhenius항적Zener-Hollomon삼수래묘술，기압축랍신변형격활능분별위132.38 kJ/mol화Q＝255.26 kJ/mol.
The behaviors of flow stress of alloy AZ31 Magnesium Alloy during high-temperature deformation were studied by isothermal deformation test on Gleeble-1500 and UTM5305 thermal mechanical simulator. The results show that the true stress increases with the strain rate and decreases with temperature. Compared with the tensile deformation process,the peak of true stress,true strain and dynamic recrystallization of compression process has a significant difference. The flow stress of AZ31 Magnesium Alloy during hot deformation can be described by using Zener-Hollomon parameter including Arrhenius item,and the compression deformation activation energy is 132. 38 kJ/mol,the tensile deformation activation energy is 255. 26 kJ/mol.