An investigation of the fretting wear of two aluminium alloys
1997; Elsevier BV; Volume: 30; Issue: 1 Linguagem: Inglês
10.1016/0301-679x(95)00118-n
ISSN1879-2464
AutoresZiyou Zhou, S.R. Gu, L. Vincent,
Tópico(s)Electrical Contact Performance and Analysis
ResumoFrett ng fatigue is one of the most detrimental loadings for crack nucleation. Aeronautical aluminium alloys have been analysed during the first cycles of fretting so to determine the evolution of the maximum tangential force and the coefficient of friction. Several stages have been identified as velocity accommodation takes place in the superficial oxide layers, in the two first bodies or in the third body (debris bed). The effects of the test frequency or of the surface roughness were shown to depend on these stages. The effect of the brittleness of the first body has been analysed by means of the comparison between Al-Li and Al-Si alloys. The latter brittle alloy better resisted crack nucleation despite its lower fatigue strength. This could be related to the early detachment of debris in the fretting contact.
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