Quantitative analysis by the ultrasonic method of the effect of fluid of quenching on elastic and acoustical properties of hardened steel

Ahmed Markou , Hassan Nounah , Mohamed Ezzaidi , Idriss Aboudaoud

We have studied by an ultrasonic non destructive testing system the effect of fluid of quenching on acoustical and elastic properties of hardened steel, the measurements are performed by an ultrasonic transducer with 5 MHz in the center frequency, working simultaneously as a transmitter and receiver. The measurements are made for three samples of steel, each of these specimens are hardened according to different conditions of tempering (different durations and fluids of quenching). From the signals backscattered by these samples, we have determined the ultrasonic velocities and attenuations of ultrasonic wave propagating in these specimens. In this study the results show that the tempering is more efficient for the sample which is quenching more times in water and then the acoustical and elastic properties are best than those tempered in air. Then in this work we have able to follow by an ultrasonic system the influence of the fluid of quenching on acoustical and elastic properties of hardened steel.

Mots clés: Ultrasonic echo; NDT; Tempering steel; Quenching fluid

Domaines: Acoustique [physics.class-ph]

Ahmed Markou, Hassan Nounah, Mohamed Ezzaidi, Idriss Aboudaoud. Quantitative analysis by the ultrasonic method of the effect of fluid of quenching on elastic and acoustical properties of hardened steel. Acoustics 2012, Apr 2012, Nantes, France. ⟨hal-00810573⟩