Abstract
In this work, both AZ91D monolithic and AZ91D/SiCp composites prepared by squeeze casting followed by hot extrusion are tested under fully reversed strain-controlled loading conditions. The effects of SiCp volume fraction (i.e. Vf=0%, 5%, 15%, 25%, and 30%) and the imposed strain amplitude on the strain-controlled fatigue life and properties are examined. Increasing the SiCp content degrades the strain-controlled fatigue properties in the low cycle regime, with a potential benefit in the high cycle regime. The relationship between elastic strain amplitude, plastic strain amplitude and reversals to failure are well described by the Basquin and Coffin–Manson equations, respectively. A comparison made between the monotonic and cyclic stress–strain curves reveals that the reinforcement amount as well as the imposed strain amplitude significantly affects the characteristics of the evolving hysteresis loops.
Published Version
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