FIBER-REINFORCED METALS AND ALLOYS
IIT RESEARCH INST CHICAGO ILL
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Examination of the slip line structure of 30 density composite with an Ag matrix and fibers of mild steel, Mo, and heat treated-type-410 stainless steel after 4 elongation showed no slip lines in the stainless steel fibers, but large amounts of deformation in the mild steel fibers. Specimens were prepared from 1 as-impregnated, 2 reduced 30 and recrystallized, 3 reduced 60 and recrystallized, and 4 reduced 90 and recrystallized Ag matrix composites, respectively. The composites were prepared from 0.001-in.-diam type 430 stainless steel SS fibers 35 density, 0.0005-in.-diam type 430 SS fibers 50 density, 20-micron-diam type 304 SS fibers 15 density, and 0.001-in.-diam Fe-20 Cr10 Al alloy fibers 15 density. The strength properties increased rapidly with reduction in area, and the elongation decreased. Recrystallization 2 hr at 500 C decreased the strength and increased elongation, but the strength of the composites recrystallized increased with prior reduction in area. The interfiber spacings were 0.0040, 0.0026, 0.0025, and 0.0021 in. for the as-impregnated, 30, 60, and 90 reduction in area condition, respectively. The density of the composites increased with the amount of rolling.