Accession Number : AD0285085

Title :   A FUNDAMENTAL STUDY OF ROLLING CONTACT FATIGUE

Corporate Author : ALLOY ENGINEERING AND CASTING CO CHAMPAIGN ILL

Personal Author(s) : HORDON,M.J.

Report Date : 01 AUG 1962

Pagination or Media Count : 17

Abstract : Spheres of Nylon and Teflon material were rolled at constant speed over a (001) surface of carefully prepared crystals of LiF under applied loads ranging from 1 to 400 gms. in the rolling contact apparatus. Under the impact of the applied load, a narrow deformation track, revealed by a high dislocation etch pit density, was left in the wake of the rolling sphere. Within the track, etch pits were clustered in localized areas probably caused by submicroscopic asperities in the surfaces of contact. Orthogonal (110) slip bands were generally observed to be aligned parallel and normal to the rolling direction at moderate stress levels; however, at higher stresses, the two other available slip systems were also observed. The experimental load data are generally in good agreement with theoretical considerations. (Author)

Descriptors :   *DEFORMATION, *FATIGUE (MECHANICS), *LITHIUM COMPOUNDS, CHEMICAL MILLING, CRYSTAL DEFECTS, CRYSTALS, ETHYLENES, FLUORIDES, FRICTION, LOADING, NYLON, POLYMERS, PREPARATION, ROLLING MILLS, SINGLE CRYSTALS, SPHERES, STRESSES, SURFACES

Distribution Statement : APPROVED FOR PUBLIC RELEASE