Specific features of acoustic emission of Ti alloys under plastic strain and fracture

This paper investigates acoustic emission of annealed and unannealed Ti alloys under static tension. Unannealed Ti alloys have three distinctive AE peaks related to different stages of strain hardening. There is a significant difference in AE signal form and two peaks for annealed Ti alloys. Discrete wavelet transform is used to analyze the measured acoustic emission peaks quantitatively. Calculated informative parameters of acoustic emission allow establishing the relation between acoustic emission and mechanisms of plastic strain and rupture under loading of Ti alloy. Obtained results can be used to analyze acoustic emission testing results of Ti alloys.