Constitutive Model of Thixotropic Plastic Forming for Semi-Solid AZ61 Magnesium Alloy
Uniaxial compression tests on semi-solid AZ61 alloy fabricated by stain-induced activation (SIMA) process and the conventional casts were carried out using the Gleedle-1500 dynamic material testing machine. The relationships between stress and stain were analyzed. The numerical relationships among processing parameters (strain rate z ε& strain z ε temperature T liquid volume fraction L f ) and stress were studied. The proposed constitutive equation was established for semi-solid AZ61 magnesium alloy using the multiple nonlinear regression method. A scientific basic provided for both numerical simulation of processing process of semi- solid AZ61 alloy and rational choice and control of processing parameters.
C.G. Kang, S.K. Kim and S.Y. Lee
H. Yan and B. F. Zhou, "Constitutive Model of Thixotropic Plastic Forming for Semi-Solid AZ61 Magnesium Alloy", Solid State Phenomena, Vols. 116-117, pp. 639-642, 2006