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A 15 vol. pct SiC_w/Al composite was fabricated by a squeeze cast route followed by hot extrusion in the extrusion ratioof 18:1 and cold rolling to 50%. Microstructural evolution in the cold rolled composite during annealing was studied usingmacrohardness measurement and transmission electron microscopy (TEM). It was found that, during cold rolling the plastic flowof the matrix was restricted by the whiskers around them along the rolling direction, which resulted in different microstructurefrom near whiskers to far away. The cold rolled composite exhibited different microstructural development on 1 h annealingat different temperatures. Under annealing at about 100℃, recovery reaction occurred obviously and the introduction ofSiC whiskers resulted in enhanced recovery reaction. Under annealing above about 200℃, recrystallization (growth of nucleiby high-angle grain boundary migration) and extended recovery took place simultaneously. When annealing temperaturewas increased up to 500℃, recrystallization
A 15 vol. Pct SiC_w / Al composite was fabricated by a squeeze cast route followed by hot extrusion in the extrusion ratio of 18: 1 and cold rolling to 50%. Microstructural evolution in the cold rolled composite during annealing was studied using macrohardness measurement and transmission electron microscopy (TEM). It was found that, during cold rolling the plastic flow of the matrix was restricted by the whiskers around them along the rolling direction, which resulted in different microstructure from near whiskers to far away. The cold rolled composite exhibited different microstructural development on Under annealing at about 100 ° C, the recovery reaction occurred obviously and the introduction of SiC whiskers resulted in enhanced recovery reaction. Under annealing above about 200 ° C, recrystallization (growth of nucleiby high-angle grain boundary migration) and extended recovery took place simultaneously. When annealing temperature was increased up to 500 , Recrystallization