변형효율을 이용한 $SiC_P$/A16061 복합재료의 열간가공성 평가

Evaluation of Hot Workability for $SiC_P$/Al16061 Composites by Deformation Efficiency

The high temperature deformation behaviour of 15vol% SiCp/A16061 composites has been studied in the temperature range of 300-50$0^{\circ}C$ and the strain rate range of 0.1-3.0/sec by torsion test. On he basis of the flow stress data the strain rate sensitivity(m) of the material is evaluated and used for calculating the deformation efficiency(η) [η=2m/(m+1)] A domain of dynamic recrystallization(DRX) could be identified in these maps by using the deformation efficiency. The characteristicvs of these results has been investigated with the help of determining the region of optimum hot working condition.