Accession Number : AD0265615

Title :   A FUNDAMENTAL STUDY OF ROLLING CONTACT FATIGUE

Corporate Author : ALLOY ENGINEERING AND CASTING CO CHAMPAIGN ILL

Personal Author(s) : REICHENBACH,G.S. ; KINGSBURY,E.P.

Report Date : 01 AUG 1961

Pagination or Media Count : 11

Abstract : An investigation was begun on rolling contact fatigue. The initial plastic flow in single crystals when stressed by a rolling steel ball will be studied by etch pit techniques. Single crystals of LiF were etched with a 1.5 x 10 to the 4th power molar solution of FeCl3 before and after stressing. Rather indistinct pyramidal pits were observed on old dislocations, and sharp square pyramidal pits on new dislocations which indicate the first areas of plastic flow and where a fatigue crack could start. A test apparatus was designed for rolling balls on the surface of single crystals under carefully controlled conditions to obtain plastic flow at the contact. It is planned to study the influence of lubricants on rolling contact and torsion fatigue.

Descriptors :   *CREEP, *FATIGUE (MECHANICS), *LITHIUM COMPOUNDS, BALL BEARINGS, CHLORIDES, CRYSTAL LATTICES, DEFORMATION, DESIGN, DETERMINATION, ELECTROLYTES, FLUORIDES, IRON COMPOUNDS, LUBRICATION, PICKLING, ROLLER BEARINGS, SINGLE CRYSTALS, STRESSES, TEST EQUIPMENT

Distribution Statement : APPROVED FOR PUBLIC RELEASE