System and method for monitoring laser shock processing

A method and system for monitoring laser shock peening of a work piece. A line spectrum is obtained from radiation emitted by a plasma produced by a laser shock peening process. The shape of the line spectrum about its emission peak is compared to a defined line shape to verify proper operation of t...

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Bibliographische Detailangaben
Hauptverfasser:	WU PINGFAN PETER, BENICEWICZ PAMELA KING, AZER MAGDI NAIM
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY CLADDING OR PLATING BY SOLDERING OR WELDING COLORIMETRY CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MACHINE TOOLS MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT MEASURING METAL-WORKING NOT OTHERWISE PROVIDED FOR METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS PERFORMING OPERATIONS PHYSICS RADIATION PYROMETRY SOLDERING OR UNSOLDERING TESTING TRANSPORTING WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	A method and system for monitoring laser shock peening of a work piece. A line spectrum is obtained from radiation emitted by a plasma produced by a laser shock peening process. The shape of the line spectrum about its emission peak is compared to a defined line shape to verify proper operation of the laser shock peening process. The line shape may be a Lorentzian line shape corresponding to a desired line shape. The line shape may a Gaussian line shape corresponding to an undesired line shape. The system can also detect the failure mode that occurs when the opaque layer is broken through by detecting the plasma spectral component produced by the work piece material, along with the plasma produced by the opaque layer.