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THE OVERALL PROGRAM
DIFFERENTIAL PHASE CONTRAST ACOUSTIC IMAGING
MECHANICAL TESTING AND THEORETICAL ANALYSES
acoustic beam acoustic differential phase acoustic resonance acoustic velocity acoustic wave Acoustical Imaging aluminum amplitude annealed apparatus applied load applied stress approximately Av/v B. P. Hildebrand basic change in phase change in velocity cracked samples delay line developed differential phase contrast dislocations double cantilever elastic electronically scanned experimental experiments FIGURE focused beam four-point bending G. S. Kino Holography images of stressed Leung longitudinal wave low frequency signal material measurement technique mechanical metal sample mixer object output phase cancellation phase change phase contrast imaging phase contrast mode phase imaging phase measurement phase sensitivity phase shift introduced plastic zone plate plexiglas plug precision pulse relative change residual stress schematic scotch tape shown in Fig Souquet stainless steel stainless steel sample strain surface acoustic wave TECHNIQUES FOR MEASUREMENT TENSILE SPECIMEN tensile stress TENSILE TEST ASSEMBLY tion transducer water tank wave passing wave velocity WOLLASTON PRISM