Papers by Author: Hong Yan

Abstract: The conventional liquid die casting and rheo-diecasting processes of magnesium matrix composites were studied with the numerical simulation method. The constitutive model of semi-solid Mg2Si/AM60 composite had been established in our prior study. The pressure and the inside defects of the material during rheo-diecasting is realized. The comparison of two forming processes is done. The results indicate that the rheo-diecasting won't lead to interior defects such as gas-hole etc. The simulation results are in accord with the experimental ones.

Abstract: The computer simulations during hammer forging process for Inconel 718 were conducted, and the temperature, strain and stress evolution were obtained and analyzed. Rebound takes place right after the ram goes up and this may have a significant effect on the temperature distribution and the reduction of friction. The simulated results can be helpful to predict further microstructure of forged product and the service life of the die.