Accession Number : AD0703595

Title :   THE INFLUENCE OF FRETTING ON FATIGUE,

Corporate Author : ADVISORY GROUP FOR AEROSPACE RESEARCH AND DEVELOPMENT PARIS (FRANCE)

Personal Author(s) : Harris,W. J.

Report Date : MAR 1970

Pagination or Media Count : 15

Abstract : A recapitulation of the characteristics of the fretting fatigue phenomenon described in AGARD Advisory Report No. 8, with a re-appraisal of the theory of the basic mechanism in the light of recent research, tend to confirm the significance of the residual tensile stress field remanent after plastic compression of the asperities, the analysis of the fatigue results indicating that, the sensitivity of fretting fatigue to the contact pressure is similar to the 'notch sensitivity' of the material, by microscopical studies, the nucleation of fretting fatigue cracks near the plastic zones surrounding the scars and, their propagation along 45 degrees planes rather than normal to the fatigue stress axis, and that the modest target of achieving 'anti-fret' resistance up to 150 degrees C (suitable for Mach 2.2 civil aircraft) can be met by the use of 'cured' polymeric - MoS2 films interposed between the contact faces. (Author)

Descriptors :   (*REFRACTORY METAL ALLOYS, FATIGUE(MECHANICS)), SURFACE ROUGHNESS, CRACKS, CRACK PROPAGATION, STRESSES, STRAIN HARDENING, WEAR RESISTANCE, FRICTION, NOTCH SENSITIVITY, SUBSTRATES

Subject Categories : Metallurgy and Metallography
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE