Patent ID: 9015942
Filing Date: 2015-04-28
Classification: B23P,C21D,F01D,F05D,G01M,Y02T,Y10T

Abstract:
1. A method of imparting deep compressive residual stress to an aerofoil, the method comprising the steps of: a) determining a stress map for the aerofoil for stress generated by Foreign Object (FOD) impact, b) determining a stress map for the aerofoil of high cycle fatigue, c) determining a stress map for the aerofoil of low cycle fatigue, d) determining a combined stress map by combining the stress map of FOD impact, the stress map of high cycle fatigue and the stress map of low cycle fatigue, e) defining a zone on the aerofoil from the combined stress map for receiving the deep residual compressive stress, and f) imparting compressive residual stress to the defined zone.