ARB법에 의해 강소성가공된 Al/SiCp 입자분산복합재료의 미세조직 및 기계적 특성

Abstract

The Al/SiCp particle reinforced composite fabricated by a powder-in sheath rolling (PSR) method was severely deformed by the accumulative roll-bonding (ARB) process. The ARB process was performed up to 8 cycles at ambient temperature without lubricant. The ARBed composite exhibited an ultrafine grained structure similar to the other ARBed bulky materials. Tensile strength of the composite increased gradually with the number of ARB cycles, but from the 6th cycle it rather decreased slightly. These characteristics of the composite were somewhat different from those of Al powder compact fabricated by the same procedures. The difference in microstructure and mechanical properties between Al powder compact and the composite was discussed.