Acoustic Emission Characteristics of Metals


This work was concerned with the study of the characteristics of the acoustic emission from various metals and with obtaining more information about this phenomena. Low and medium carbon steels, Aluminium, Copper and Brass were used in this work. Notched and unnotched flat and round tensile specimens of different dimensions were used. Three-point bending tests were carried out on steel specimens with different notch root radii. The frequency bandwidth of the acoustic emission monitoring system used was 100-300KH2. The output signals were rYecorded on a magnetic tape recorder and an on-line minicomputer was used to analyse the recorded signals. The results showed that the number of acoustic emissions was affected by many factors such as type of metal, microstructure, the notch size, and specimen size. However, the frequency content of the acoustic emission signals was less affected by the above factors, but the frequency ranges of the analysed signals was found to be affected by the type of test carried out i.e. tensile or three-point bending test. The results showed that acoustic emission is a very useful technique in material research and a valuable method for non-destructive testing.

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Divisions: College of Engineering & Physical Sciences > School of Engineering and Technology > Mechanical, Biomedical & Design
Additional Information: Copyright © Laith Salim Sulaiman, 1979. Laith Salim Sulaiman asserts their moral right to be identified as the author of this thesis. This copy of the thesis has been supplied on condition that anyone who consults it is understood to recognise that its copyright rests with its author and that no quotation from the thesis and no information derived from it may be published without appropriate permission or acknowledgement. If you have discovered material in Aston Publications Explorer which is unlawful e.g. breaches copyright, (either yours or that of a third party) or any other law, including but not limited to those relating to patent, trademark, confidentiality, data protection, obscenity, defamation, libel, then please read our Takedown Policy and contact the service immediately.
Institution: Aston University
Uncontrolled Keywords: Acoustic Emission counts,Acoustic Emission rate,Non-destructive testing,Fast Fourier transformation (F.F.T.)
Last Modified: 13 Dec 2023 17:43
Date Deposited: 11 Jan 2011 11:34
Completed Date: 1979-11
Authors: Sulaiman, Laith Salim

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