The application of acoustic emission technique to plastic deformation of low carbon steel

In present paper, using Acoustic Emission (AE) as an ultrasonic technique, the onset of plastic deformation has been investigated on smooth and notched specimens of AISI 1010 steel. AE activities (number of counts and signal energy) and stress-strain curve were measured during tests. The results show that activity of AE increases near the yield point and reaches to maximum at beginning of plastic deformation. AE activity decreases significantly with further straining. The main source of AE at all stages of deformation is associated with massive dislocation motion.