Abstract
Fatigue performances of an in-situ TiB2 particle reinforced 2024-T4 alloy matrix composite (TiB2/2024Al) and 2024-T4 aluminum alloy (2024Al) were investigated. Stress- and strain-controlled fatigue experiments were conducted to obtain the fatigue lives. High-cycle fatigue performance was experimentally studied under different stress concentration levels. The results showed that the addition of in-situ particles enhances the fatigue resistance. A fatigue life prediction method was developed based on a damage-coupled Chaboche elastic–plastic constitutive model. Fatigue life predictions were performed using the established method and compared with the experiments. It was observed that the proposed method achieves fatigue life predictions with satisfactory accuracy.
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