Localized deform behavior of AZ31B magnesium alloy by numerical simulation |
| |
Authors: | F Zhang Z Liu P Mao F Wang Y Liu |
| |
Affiliation: | School of Materials Science and Engineering, Shenyang University of Technology, SHENYANG, 110870 P. R. CHINA |
| |
Abstract: | The dynamic compression behavior of AZ31B magnesium alloy with hat shaped specimen was investigated at high strain rate in this paper. Based on the Johnson‐cook constitutive model and fracture model, the interaction of temperature, stress and strain fields of AZ31B magnesium alloy with hat shaped specimen were numerically simulated by using ANSYS/LS‐DYNA software under different strain rates, which was validated by experiment. It is found that the plastic strain is highly concentrated on the corner of the hat shaped specimen, which leads to large localized deformation. The voids are nucleated and extended by compression stress. Work harden effect is caused by remained plastic strain, which is located around adiabatic shear band. The stress collapse is discovered in gauge section, which is also discovered in experiment. Thermal soften effect is suppressed with the strain rate increased. |
| |
Keywords: | AZ31B magnesium alloy dynamic compression adiabatic shear band numerical simulation impacting MgAl3Zn1 Magnesiumlegierung dynamische Stauchung adiabatische Scherbä nder numerische Simulation Kaltschlagschmieden |
|
|