# Effect of Volume Fraction on Mechanical and Fatigue Crack Growth Properties of SiC Particle Reinforced AL Alloy Composites

• 권재도 (영남대학교 기계공학과) ;
• 안정주 (영남대학교 대학원 기계공학과) ;
• 문윤배 (영남대학교 대학원 기계공학과)
• Gwon, Jae-Do (Dept.of Mechanical Engineering, Yeungnam University) ;
• An, Jeong-Ju (Dept.of Mechanical Engineering, Yeungnam University) ;
• Mun, Yun-Bae (Dept.of Mechanical Engineering, Yeungnam University)
• 발행 : 1996.04.01

#### 초록

In order to save the energy and protect the environment, it were studied about ecomaterials with the developed countries as central figure. In the Metal Matrix Composites(MMCs), this trends appeared the development of the MMCs which had excellent mechanical properties in spite of the low volume fraction of reinforcement. Therefore, in this study, fatigue crack growth test, tensile and hardness test were conducted in order to investigate the mechanical and fatigue properties of 5 %, and 10 % $SiC_{p}$/Al composites. As the results, in the tensile and hardness test, tensile strength and hardness increased but fatigue crack growth rate decreased with $SiC_{p}$/Al volume fraction. And in the view of fatigue failured surface through the SEM, fatigue crack initiated around the SiC particle and in low $\Delta{K}$ regions, fatigue creck detoured the SiC particle but crack propagated through the SiC particle in the high $\DeltaK$ regions.