Analysis of acoustic emission signals generated from SCC propagation

This paper presents a comparison between the acoustic emission (AE) signals generated by the transgranular stress corrosion cracking (TGSCC) of Ag-10Au (at.%) single crystals and those originated by the intergranular stress corrosion cracking (IGSCC) of a polycrystalline silver-gold alloy under the same experimental conditions. No significant difference is found between the mean amplitude and rise-time of the AE signals registered during the propagation of TGSCC and those measured for IGSCC propagation. Results also show that the AE signals generated by either TGSCC or IGSCC propagation in three different alloys such as AISI 304 SS, alpha-brass and Ag-Au alloys show similar AE parameters and similar amplitude distribution. (C) 2011 Published by Elsevier Ltd.