Abstract
In this article, the high cycle fatigue (HCF) behavior of AZ31B/1.5 vol.% Al2O3 nanocomposite was investigated at elevated temperatures. To understand the influence of nano-sized reinforcing particles, the results were compared to those of monolithic AZ31B samples. The effect of reinforcing particles and temperature was studied on tensile, compressive, and HCF behaviors of the specimens. According to the results, the nanocomposite showed improved mechanical properties in comparison to the monolithic alloy at all temperatures. The results of HCF tests at 100 °C and 200 °C revealed that the enhanced ultimate tensile strength in the composite is the most important factor in modifying the HCF behavior, especially at the higher temperature. Unlike the tensile and the compressive tests, increasing the temperature from 100 °C to 200 °C reduces the impact of the reinforcing particles on the fatigue behavior of the composite, which could be attributed to the formation of magnesium oxide on the samples surfaces.
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