1987 Volume 37 Issue 3 Pages 179-184
Tensile strength and workability of Al/alumina short fiber composites fabricated by the high pressure casting method and cold rolled were investigated. The cold work of the composites was possible up to 20% of volume fraction of alumina fiber. The rate of the strength increase at the initial stage of rolling was large in high alumina fiber content composites and the limit of the strength increase was 21-22kgf/mm2 in all composites. The high temperature tensile strength decreased rapidly with temperature, and the strength also decreased to those of as-cast composites by annealing at 300°C. The increase in tensile strength seemed to be caused not by the degrees of fiber orientation, but by work hardening. The fracture strain of the composites decreased with volume fraction of fiber.
