Abstract
An integrated calculated approach based on weakly coupled finite element(FEM)-viscoplastic self-consistent(VPSC)model was established to simulate the texture evolution during the variable strain path extrusion process of magnesium alloys.The spiral die extrusion(SDE)process with additional circumfer-ential shear deformation was applied to investigate the effect of path control on texture adjustment and verify the accuracy of the model.The results indicated that the additional spiral shear resulting from the overall inclined flow path effectively reduced the intensity of the {0002}//ED fiber texture by suppressing basal slip activation in the core area,while the local shear deformation along the spiral equal channel strain path led to the formation of an inclined {0002}//ND plane texture on the side.Using the modified Hall-Petch relationship,the correlation between texture and yield strength was quantified.Specifically,the weakening of the texture effectively suppressed {10-12} tensile twinning,which compensated for the deficiency of compressive yield strength without significantly sacrificing tensile yield strength,and thus improved the tension-compression asymmetry.Furthermore,the strongly inclined {0002}//ND plane tex-ture inhibited the widespread activation of basal slip during tensile yielding,thereby enhancing the yield strength.
基金项目
National Natural Science Foundation of China(51975146)
National Natural Science Foundation of China(52205344)
Shandong Province Natural Science Foundation(ZR2020QE171)
National Research Foundation of Korea(NRF)grant funded by the Korea government(MSIP)(NRF-2021R1A2C3006662)
National Research Foundation of Korea(NRF)grant funded by the Korea government(MSIP)(NRF-2022R1A5A1030054)
NETL
NSTL
万方数据