한국주조공학회

The effect of size and mass fraction of SiC particulate on the fatigue and wear have been investigated for semi-liquid formed SiCp/AZ91HP Mg composites. In the study, different particulate sizes of 7, 20, 50μм were prepared with various mass fraction for sample preparation. By tension- tension fatigue tests, whose procedures are standardized in ASTM standard 647E-93, the da/dN vs. △K curves were obtained. Also, the crack propagation paths were observed by optical microscope. As a result of wear test, specific wear loss is decreased with increasing mass fraction and particulate size. Specific wear loss of 30 mass% 50μм SiC reinforced Mg composite is compared to SKD11.