MATERIAL DIAGNOSTIC METHOD

摘要

Provided is a material diagnostic method capable measuring and diagnosing in a nondestructive manner the type, quantity of occurrence, depth distribution, and the like of even very small microstructures of about several tens of μm or less with sufficiently good precision. A material diagnostic method for using ultrasonic waves in a nondestructive manner to diagnose microstructures generated in a material, wherein changes in the scattering of ultrasonic waves by crystal grains are captured from bottom face waves and backscattered waves to thereby quantify the amount of change in microstructures, using the fact that changes in the properties of crystal grains produced by microstructures affect the scattering of ultrasonic waves.

主权项

1. A material diagnostic method of performing non-destructive diagnosis of microstructures occurring in a material by using ultrasonic, wherein
with utilizing a fact that a change in physical properties of crystal grain caused by microstructures affects ultrasonic scattering, a change in the ultrasonic scattering by crystal grains is recognized from bottom surface wave and backscattered wave so that an amount of change in the microstructures is quantified.