Patent ID: 7821645

Claim:
A microstructural feature and material property monitoring device for a metallic material, which monitors the microstructural feature and material property of the metallic material, comprising: a laser oscillator which applies a laser beam to a first surface of the metallic material and induces pulsed ultrasonic waves in and that propagate in the metallic material; a laser interferometer which detects the pulsed ultrasonic waves that have propagated in the metallic material on a second surface of the metallic material, on a side opposite to the first surface of the metallic material, and transmits the pulsed ultrasonic waves as an electrical signal; moving means for relatively moving irradiation position of the laser beam generated by the laser oscillator and detection position of the laser interferometer; control means which aligns the irradiation position of the laser beam generated from the laser oscillator and the detection position of the laser interferometer with a relative position, according to the microstructural feature and material property of the metallic material to be monitored, by controlling the moving means based on time from induction of the pulsed ultrasonic waves until detection by the laser interferometer; and calculating means which calculates the microstructural feature and material property of the metallic material based on waveform of the pulsed ultrasonic waves detected as an electrical signal by the laser interferometer.