|About this Abstract
||Materials Science & Technology 2011
||Fatigue and Microstructure: A Symposium on Recent Advances
||Effect of Fiber Shot Particles on Fatigue Performance of Hybrid SiCp/Fiber Al Metal Matrix Composite
||Justin Clark, Paul Sanders
|On-Site Speaker (Planned)
Fatigue tests were carried out on two hybrid Fiber/Particulate reinforced aluminum metal matrix composites to determine the effect of shot particle content on crack initiation and final failure of the composite. Samples were produced using a preform infiltration method. Al/35% SiCp/5% Fiber composites with either Al<sub>2</sub>O<sub>3</sub> (Saffil) with a minimal shot content, or Al<sub>2</sub>O<sub>3</sub>/SiO<sub>2</sub> (Enfil) with a significant shot content, fibers were tested. Tests were carried out at 20 °C, 246 °C, and 412 °C at max stresses of 100Mpa, 120Mpa, and 140Mpa. All maximum stress values were at or above the materials yield stress at elevated test temperature. Fracture surfaces show no evidence of fatigue failure. Failure appears to be a result of overloading resulting in ductile failure with some regions of brittle failure in SiC particles. Microstructural examination showed a reduction in size of SiC particles which appears to be a function of testing time and stress.
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