Characteristics Analysis of Acoustic Emission Signals from Titanium under Tensile Fracture

The parameters of acoustic emission signals were analyzed which titanium plate specimens with crack under tension fracture process used acoustic emission technique. Based on the results of stress-strain curves, crack opening displacement-time curves and CCD images, the relationship between parameters of acoustic emission signal and mechanical behavior of the titanium was investigated. The results show acoustic emission signals increased significantly during yield, crack propagation and fracture with different load speeds, the energy amplitude range of acoustic emission signals was mainly from 50dB to 65dB. The characteristic parameters including AE energy, hit and amplitude can be used to represent the mechanical and inner deformation form of titanium during plastic deformation and fracture process.