A FLOW STRESS MODEL FOR AZ61 MAGNESIUM ALLOY

作者：H T Zhou; X Q Zeng; Q D Wang; W J Ding State Key Laboratory of Metal Matrix Composite; Shanghai Jiaotong University; Shanghai; China

来源：Acta Metallurgica Sinica (English Letters), 2004, (02): 155-160.

• magnesium alloy
• flow stress model
• hot deformation
• straion softening

<正> The flow stress behaviors of AZ61 alloy has been investigated at temperature rangefrom 523 to 673K with the strain rates of 0.001-1s-1. It is found that the averageactivation energy, strain rate sensitive exponent and stress exponent are different atvarious deformation conditions changing from 143.6 to 176.3kJ/mol, 0.125 to 0.167and 6 to 8 respectively. A flow stress model for AZ61 alloy is derived by analyzingthe stress data based on hot compression test. It is demonstrated that the flow stressmodel including strain hardening exponent and strain softening exponent is suitableto predicate the flow stress. The prediction of the flow stress of AZ61 alloy has shownto be good agreement with the test data. The maximum differences of the peak stressescalculated by the model and obtained by experiment is less than 8%.

• 出版日期2004-4-30