ABSTRACT
The basic mechanical properties of an MMC are usually obtained from its stress-strain curve, i.e., stiffness (Young's modulus E), yield stress fTy (or flow stress at some percent offset strain), and strength (ultimate tensile stress, UTS). In addition to these properties, ductility (strain to failure, Er) and fracture toughness (K1c) may also be considered as basic mechanical properties. The basic mechanical properties are expected to decrease with increase in testing temperature T except for Er and possibly K1c at some intermediate temperatures. The decrease in E, fT Y' and UTS of an MMC at high temperatures is attributed mainly to two factors:
softening of the matrix metal at high temperatures and degradation of the reinforcing phase (fiber or particulate) or the interface between matrix and reinforcing phase at high temperatures.
