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The effect of contact pad hardness on the fretting fatigue behaviour of AZ61 magnesium alloy
Author(s) -
Sadeler R.,
Atasoy S.
Publication year - 2016
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1111/ffe.12387
Subject(s) - fretting , materials science , vickers hardness test , hardness , metallurgy , alloy , fatigue limit , composite material , magnesium alloy , slip (aerodynamics) , magnesium , indentation hardness , enhanced data rates for gsm evolution , contact mechanics , microstructure , structural engineering , finite element method , telecommunications , physics , computer science , engineering , thermodynamics
In the present study, the effect of hardness of contact material on fretting fatigue strength was experimentally investigated as a function of stress ratio. AZ61 magnesium alloy used in defense and transportation industries was used as the material for both the specimen and the contact pad. Two levels of hardness of contact material, 55.3 Vickers Hardness (HV) and 83.3 HV, were prepared by heat treatments. According to the results, with increasing hardness, the fretting fatigue strength decreased. The relative slip amplitude increased with increasing hardness, while the tangential force amplitude was not influenced by the hardness. It was speculated that because the local tangential stress at the contact edge increases with increasing hardness, the fretting fatigue strength decreases with increasing hardness.