METHOD OF DETERMINING MECHANICAL PROPERTIES OF METALS DURING PLASTIC DEFORMATION Russian patent published in 2005 - IPC

FIELD: nondestructive testing of materials.

SUBSTANCE: method comprises exciting ultrasonic oscillations in the article to be tested with the use of the first piezoelectric converter, receiving the oscillations with the second piezoelectric converter, which is mounted at a given distance from the first one, measuring the time interval which the signals take to cover the zone without defects and the article t₂, comparing the time intervals, moving the piezoelectric converters over the surface of the article, and determining the front of the defect zone from time interval t₂. Upon the determining of the front of the defect zone, the piezoelectric converters are displaced until the difference between the time intervals disappears.

EFFECT: enhanced reliability of determining.