Application of the frequency analysis of acoustic emission in the study of the metal alloy solidification
Abstract
A frequency analysis of the acoustic emission signals was applied for the investigation of the solidification of a Pb-Sb alloy. Spectra of continuous emission and short-time acoustic emission impulses were investigated. It has been stated that, together with structural changes of the Pb-Sb alloy, significant changes occur in the spectra of the acoustic emission impulses generated in different phases of solidification. Less significant changes were observed in continuous acoustic emission spectra.References
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[4] T.S. Prosanna Kumar and O. Prabhakar, Acoustic Emission during Solidification of Aluminium Alloys, AFS Transactions, 93, 13–22 (1985).
[5] A.L. Purvis, E. Kannatey Asibu and R.D. Pehlke, Evaluation of Acoustic Emission from Sand Cast Aluminium Alloy 319 During Solidification and Formation of Casting Defects, AFS Transactions,
98, 1–7 (1990).
[6] A.L. Purvis et al., Acoustic Emission Signal Characteristics from Casting Defects Formed During
Solidification of Al. Akkoy 319, AFS Transaction, 99 (1991)
[7] B. Xiufang et al., Acoustic Emission during Solidification of Al.-Si Alloy, Proceedings of Second International Conference on Aluminium Alloys, Beijing 1990.
[8] A.L. Purvis, E. Kannatey Asibu, Jr. and R.D. Pehlke, Linear Discriminant Function Analysis of AE Signals Generated During Solidification, AFS Transactions, 1, 1–8 (1995).
[9] A. Vinogradov, M. Nadtochly, S. Hashimoto and S. Miura, Comparative Analysis of the Acoustic Emission Spectra in Copper and Copper-aluminium Single Crystals, La Revue de M´etallurgie-CIT/Science et G´enie des Mat´eriaux, pp. 215–223, Fevier 1996.
[10] Multi-author work, Acoustic Emission (AE) in identification and investigation of the metal alloy solidification and crystallization. Final statement PB 1244/S2/93/04[in Polish], Poznan University of Technology, Institute of Applied Mechanics, Division of Dynamics and Vibroacoustics of Systems, Poznan 1994.
[11] M. Golec and Z. Golec, Frequency analysis of the acoustic emission applied to investigation of the metal alloys solidification [in Polish], [in:] New trends in technology and material investigations, Polish Academy of Sciences Institute of Fundamental Technological Research, J. Ranachowski [Eds.], pp. 65–72.
