METHOD FOR ACOUSTIC-EMISSIVE PREDICTION OF PARAMETER OF CONTINUOUS HARDNESS OF METAL Russian patent published in 2005 - IPC

FIELD: acoustic control methods.

SUBSTANCE: method includes measuring parameters of acoustic emission of control samples from examined metal during loading thereof. Control samples are subjected to prior one-axis load, following heating to 600°C, during which parameters of acoustic emission are measured: pulse count speed , pulse/sec, energy collection speed , mW²/sec and signals length collection speed , ms/sec, and relation of these from temperature is built, last peak of acoustic emission activity is determined from dependence = f (T), in maximum point of this peak complex parameter K = /² is calculated, then control samples are loaded to given load and exposed during this load with determining of time till destruction t_R, correlation curve "complex parameter K - time till destruction t_R" is built, which is used to determine time till destruction of researched material, by measuring same parameters of acoustic emission for it under similar conditions to control samples, during heating of it to same temperature, and by calculating complex parameter K in similar fashion.

EFFECT: higher productiveness.

2 dwg