The effect of the Al2O3 dust environment on the crack propagation behaviour of 2524‐T3 Al alloy was investigated. The results show that the Al2O3 dust environment reduces the fatigue crack growth rate (FCGR) of alloy especially at low ΔK. Many Al2O3 particles are deposited and stuck in the crack during fatigue loading which promotes crack closure, while this effect is gradually weakened with the increase of ΔK. The deposited Al2O3 particles induce the disorderly arranged slip bands (SBs) ahead of the crack tip which deflects the crack path making it more tortuous in the Al2O3 dust.
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Chen et al. (2020) studied this question.
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