Effect of trivalent chromium process on fatigue lifetime of 2024-T3 aluminium alloy

Myriam Akanou (1, 2) , Romain Saillard (1) , Benoit Fori (2) , Christine Blanc (1) , Grégory Odemer (1)

1 CIRIMAT - Centre interuniversitaire de recherche et d'ingenierie des matériaux
2 Mecaprotec Industries

The effect of a new alternative trivalent chromium conversion process on fatigue lifetime of a 2024-T3 aluminium alloy was investigated. The decrease in fatigue-life induced by coating process was related to the dissolution of coarse intermetallic particles during the deoxidation pre-treatment preceding the conversion layer growth.

Mots clés: Aluminium alloy; Fatigue lifetime; Conversion coating; Crack initiation

Domaines: Matériaux

Myriam Akanou, Romain Saillard, Benoit Fori, Christine Blanc, Grégory Odemer. Effect of trivalent chromium process on fatigue lifetime of 2024-T3 aluminium alloy. Materials Science and Engineering: A, 2019, 743, pp.322-326. ⟨10.1016/j.msea.2018.11.099⟩. ⟨hal-02135649⟩