SAE AMS-R-81841

Description / Abstract: Rotary flap peening is intended to induce surface compressive stresses in metal parts such as axles, springs (helical, torsional and leaf), gears, shafting, aircraft landing gear assemblies, wing structures, jet engine support members, helicopter rotor hub assemblies, etc. which are subjected to repeated applications of load pattern for the purpose of improving resistance to fatigue and stress corrosion cracking. Rotary flap peening is also used for applications such as to close porosity in castings and to straighten or form applicable parts. Peening with metal carbide bonded shot flaps should be used where iron contamination of non-ferrous parts or surface finish are particularly important.