| This study was focused to investigate the influence of die casting temperature on microstructure and mechanical properties of SiC_p(10 and 20vol%)/Al alloy composites and to perform statistical evaluation for strength of SiC_p/Al alloy composites in order to predict the die cast Al alloy composites reliability. Die casting was performed using the preheated mold at the pouring temperature range of 620-750℃ under the pressure of 1,039㎏f/㎠. The pre-charging low speed and a following high injection speed were 0.4 and 2.1㎧, respectively. It was found that the SiC particulates were homogeneously distributed in refined Al matrix, resulting from the improvement of segregation due to rapid solidification. The tensile strength of SiC_p(10 and 20vol%)/Al alloy composites was found to be increased with increasing cast temperature. However, the tensile strength was decreased at the cast temperature of 750℃ in 20vol%/Al alloy composites. For the statistical evaluation of strength, the weibull modulus of SiC_p/Al composites was 22.2(10vol.%) and 14.2(20vol%) at cast temperature of 700℃. |
|
