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International Journal of

Recent Trends in Engineering

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International Journal of Recent Trends in Engineering (IJRTE)

ISSN 1797-9617

Volume 1,  Number 5,  May 2009

Issue on Mechanical Engineering

Page(s): 86-89

Applicability of acoustic emission in the analysis of friction stir Welded joints

           Suresha C N, Rajaprakash B M, and Sarala Upadhya

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Abstract

Most materials and structures emit energy in the form of mechanical vibrations (Acoustic Emission (AE)) as a result of sudden change or movement of which is due to defect-related phenomena such as cracking or plastic deformation. These acoustic emissions propagate from the source, throughout the structure. The technique of electronically “listening” to the acoustic emission is used worldwide in detecting and locating defects as they occur across the entire monitored area providing early warning of pending failure, in a timely and cost effective manner.  Friction Stir Welding (FSW) process proves to be one of the novel fusion welding processes and suitable to weld wide range of similar and dissimilar material combinations. In this context it has been proposed to study the applicability of AE technique in the analysis of FSW joints. Also a conceptual model has been developed to correlate the FSW process parameters, tool profile, material flow pattern, microstructures, mechanical properties, etc with AE signals to assist in monitoring and control of the weld quality.

Index Terms

AE, AE Signals, FSW, Process parameters.

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