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By using ultrasound velocity measurements, it is possible to estimate the material anisotropy. Because of material anisotropy, distinct sound velocities are obtained for different measured directions. To qualify the ultrasonic inspection procedure, four conditions of the material, three different directions (with relation of the rolling direction) and two operators were used. After the measurement, the values were analyzed using the ANOVA method. Finally, it was possible to verify that there is no interference of the operator, which guarantees a good reproducibility of t h e inspection procedure, and that there is interference of the direction of inspection, demonstrating the condition of anisotropy of the material.

Interaction between the ultrasound velocity and material properties using ANOVA