Laser Photoacoustic Microscopy of Mechanical Stresses in Modern Ceramics and Metals

K.L. Muratikov; A.L. Glazov

doi:10.4028/www.scientific.net/MSF.524-525.471

Paper Titles

Letterbox Type Repair Weld Finite Element Simulation and Residual Stress Prediction
p.445

Ultrasonic Stress Measurement in Welded Component by Using Lcr Waves: Analysis of the Microstructure Effect
p.453

Ultrasonic Stress Measurement: Application to Preload Assessment on Already Tightened Bolts
p.459

A new Approach in Residual Stresses Analysis by Speckle Interferometry
p.465

Laser Photoacoustic Microscopy of Mechanical Stresses in Modern Ceramics and Metals
p.471

Experimental Study of the Influence of a Trailing Heat Sink on the Welding Residual Stress Distribution
p.479

Development and Effects of Residual Stresses in Joints Produced by Electromagnetic Compression and its Implication on the Mechanical Properties
p.485

Post-Weld Heat Treatment Stress Relaxation in Zircaloy 4 Plasma Welds
p.491

Development of Instrument for Residual Stress Measurement in a 50 mm Inner Diameter Power Generation Pipes
p.497

HomeMaterials Science ForumMaterials Science Forum Vols. 524-525Laser Photoacoustic Microscopy of Mechanical...

Laser Photoacoustic Microscopy of Mechanical Stresses in Modern Ceramics and Metals

Abstract:

The photoacoustic piezoelectric images of Vickers indented silicon nitride, Al2O3-SiCTiC composite ceramic, nanonickel and nanocopper in unloaded and loaded states are presented. It is demonstrated the influence of mechanical stresses on the photoacoustic images of Vickers indented areas both for ceramics and metals. For Al2O3-SiC-TiC composite ceramic it is also shown that an increase of annealing time is accompanied by the decrease in the photoacoustic response from the radial crack tips. The obtained photoacoustic experimental results are explained within the framework of the model for the photoacoustic effect in stressed solids proposed by us earlier.