Aging treatment affects fatigue behavior and fracture mechanisms of SiCp/Al composites under multiaxial loading, indicating significant improvements in performance.
The effects of aging treatment on fatigue behavior and fracture mechanism of SiCp/Al composites under uniaxial, multiaxial proportional, and non‐proportional loads were investigated. The SiCp/Al composites exhibit cyclic softening in torsional strain amplitude, and the cyclic softening/hardening of the axial strain amplitude is associated with the proportional/non‐proportional loading conditions. The axial and torsional strains of SiCp/Al composites under symmetric multiaxial loads show significant asymmetric strain response. The aging treatment improved the Si particle distribution, and the probability density statistics of Si particle size under different aging conditions were analyzed. The additional plastic damage caused by multiaxial loading is highly susceptible to aging treatment. The addition of SiC particles significantly changes the crack growth path and dislocation accumulation. EBSD was employed to investigate the multiaxial fatigue failure mechanism of SiCp/Al composites.
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Liu et al. (2025) studied this question.
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