Abstract
Fatigue strength of aluminum reinforced by SiC whiskers was studied under rotating bending moment at elevated temperature in air . The tests on five kinds of whisker volume fractions (0, 5, 10, 15 and 20) were carried out. The results obtained were summarized as follows;
(1) The tensile strength of the composite material becames higher as the volume fraction of whiskers increases. And the tensile strength decreases with increasing the test temperature.
(2) The fatigue strength at room temperature increases proportionally with the increase of the volume fraction of whiskers. The fatigue strength at elevated temperatures follows the relatonship with the volume fraction as well as the tensile strength.
(3) The typical striation on the fatigue fracture surface becomes obscure and the surface becomes rougher as SiC volume fraction increase.
