简介：Aresidual-stressprofilealongthethicknessofanaluminumalloysheetisdeterminedbylaser-ultrasonictechnique.SurfaceacousticwavesaregeneratedbyaNd:YAGpulselaseranddetectedbyaHeterodyneinterferometeronalateralfreesurfaceofthesheet.Thedistributionofresidualstressisdeterminedbymeasuringtherelativevariationofthewavevelocitiesatdifferentlocationofthesamplealongitsthickness.Thistechniqueisvalidatedbythreedifferentresidualstressprofilesobtainedexperimentally.
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