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.

研究了原位TiB ₂颗粒增强的2024-T4合金基复合材料（TiB ₂ / 2024Al）和2024-T4铝合金（2024Al）的疲劳性能。进行了应力和应变控制的疲劳实验，以获取疲劳寿命。实验研究了在不同应力集中水平下的高周疲劳性能。结果表明，原位颗粒的加入增强了抗疲劳性。基于损伤耦合的Chaboche弹塑性本构模型，开发了疲劳寿命预测方法。使用建立的方法进行了疲劳寿命预测，并与实验进行了比较。观察到，所提出的方法以令人满意的精度实现了疲劳寿命预测。