Accession Number : ADA305914

Title :   Laser Shock Peened Compressive Residual Profile after Exposure to Temperature.

Descriptive Note : Final rept. 1 Jan-1 Jun 94,

Corporate Author : WRIGHT LAB WRIGHT-PATTERSON AFB OH AERO PROPULSION AND POWER DIRECTORATE

Personal Author(s) : Lykins, Chris ; Prevey, Paul ; Mason, Perry

PDF Url : ADA305914

Report Date : SEP 1995

Pagination or Media Count : 20

Abstract : The surface of any component that undergoes mechanical loading is particularly important in influencing the fatigue life of that part. The factors that contribute to surface fatigue sensitivity are less slip restriction at the surface, the existence of single edge cracks, the surface sees large tensile gradients when the part is exposed to bending and torsion, the surface tends to be an area of multiple defects and the surface is the most sensitive region to environmental effects such as corrosion. Compressive residual stresses are utilized in the turbine engine environment to counteract regions on the surface that must withstand high tensile stresses.

Descriptors :   *LASER DAMAGE, *THERMAL SHOCK, *SHOT PEENING, FATIGUE LIFE, EXPOSURE(GENERAL), TENSILE STRESS, CRACKS, BENDING, SENSITIVITY, SURFACES, DEFECTS(MATERIALS), TEMPERATURE GRADIENTS, RESIDUAL STRESS, TORSION, COMPRESSIVE PROPERTIES, TURBINE COMPONENTS, LASER TARGET INTERACTIONS.

Subject Categories : Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE