METHODS FOR TESTING LASER SHOCK PEENING

• Main Authors: DUESLER, Paul, W, FILEWICH, Paul
• Format: Patent
• Language: English; French; German
• Published: 30.12.2020
• Subjects: CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS; CHEMISTRY; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; FERROUS OR NON-FERROUS ALLOYS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; MACHINE TOOLS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; MEASURING; METAL-WORKING NOT OTHERWISE PROVIDED FOR; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; PERFORMING OPERATIONS; PHYSICS; SOLDERING OR UNSOLDERING; TESTING; TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES; TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WELDING; WORKING BY LASER BEAM

A method for testing an edge of a rotor blade that has been hardened is disclosed. A shallow notch is created in the edge of the blade using a laser and the blade is then tested using an HCF process. If the blade passes the test, a deeper notch is imparted into the edge of the blade and the blade is retested. If the blade passes the second test, a third notch may be imparted into the edge of the blade and the blade is tested again. Any test failure may provide assistance in modifying the parameters used to harden the blade. The blade may be initially hardened using an LSP process.