High Temperature Deformation and Fracture Behaviour of Continuos Alumina Fiber Reinforced Aluminum Composites With Different Fiber Orientation

摘要

Deformation and fracture behaviours were investigated in a continuous alumina fiber reinforced aluminum compo- site by tensile tests of specimens with different tensile axis orientations to the fiber axis at various temperatures from room temperature to 773 K. The orientation dependence of the tensile strength is well described by the maximum stress theory as well as by the Tsai-Hill's theory. Temperature dependences of strength σ_c of composite in the direction of fiber axis, shear strength τ_u of the matrix Along the fiber axis and tensile strength σ_u of composite in the direction of fiber axis, shear strength τ-u of the matrix Cluded that the decrease in the tensile strength of he composite with the rise of temperature is mainly due to the decrease In the τ_u and σ_u.