Fretting Corrosion and Fretting Fatigue

Part of the Sagamore Army Materials Research Conference Proceedings book series (SAMC, volume 26)


Two metals and alloys, in intimate contact, but with a small amount of relative motion between them, will often show excessive weight losses. If the relative motion between the parts is caused by applied stresses the parts may also suffer from premature fatigue failures. The former phenomenon is called fretting corrosion or “wear” corrosion while the latter phenomenon is called fretting fatigue. Fretting is characterized by the production of large amounts of debris consisting mostly of powdered metal oxide with some flakes of unoxidized metal. The damage due to fretting in air increases with increasing pressure between faying parts, increasing relative motion and increasing number of cycles. Damage decreased with increasing temperature, relative humidity and frequency. (1) The effects of cyclic history and frequency have been shown to be environment dependent with no effect of either variable being observed in the absence of oxygen. (1,2) A semi-empirical formula has been developed to describe weight loss in fretting corrosion:
$${\rm{W}}\,{\rm{ = }}\,\left( {{{\rm{k}}_{\rm{o}}}\,{{\rm{L}}^{{\rm{1/2}}}}\,{\rm{ - }}\,{{\rm{k}}_{\rm{1}}}\,{\rm{L}}} \right)\frac{{\rm{C}}}{{\rm{f}}}\,{\rm{ + }}\,{{\rm{k}}_{\rm{2}}}\,\ell {\rm{LC,}}$$
where W = weight loss due to fretting L = Load C = No. of cycles f = Frequency l = relative slip k0, k1, k2= constants dependent on alloy systems This equation physically divides the fretting process into environmental effects (frequency dependent) and strictly mechanical effects.


Excessive Weight Loss Fatigue Crack Initiation Asperity Contact Powdered Metal Oxide Metallic Debris 
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Copyright information

© Plenum Press, New York 1982

Authors and Affiliations

  1. 1.Rensselaer Polytechnic InstituteTroyUSA

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