New developments in impulse acoustic microscopy applied to the shaped material characterization

In recent years, several studies have proposed a variety of ultrasonic techniques for a non-destructive determination of texture in materials shaped by rolling or embossing. In this paper, we proposed to use as ultrasonic method an impulse line-focus acoustic microscope operating in the MHz range for the material characterization by means of measuring the Rayleigh waves velocity versus their propagation direction. The goal of this study is to evaluate the accessible coefficients W/sub 1mn/ of the Crystallite Orientation Distribution Function (C.O.D.F.) in the case of rolled tantalum sheets exhibiting an induced texture.