Nondestructive evaluation of corrosion damage of Al-alloys by in-situ AE monitoring and nonlinear elastic wave spectroscopy testing

0366795 - ÚT 2012 RIV CZ eng C - Conference Paper (international conference)
Kober, Jan - Převorovský, Zdeněk
Nondestructive evaluation of corrosion damage of Al-alloys by in-situ AE monitoring and nonlinear elastic wave spectroscopy testing.
NDT in Progress 2011. Brno: University of Technology Brno, 2011 - (Mazal, P.), s. 143-148. ISBN 978-80-214-4339-6.
[NDT in PROGRESS /6./. Praha (CZ), 10.10.2011-12.10.2011]
R&D Projects: GA MPO(CZ) FR-TI1/274; GA ČR(CZ) GAP104/10/1430
Institutional research plan: CEZ:AV0Z20760514
Keywords : aluminium alloys * acoustic emission (AE) * nonlinear wave modulation spectroscopy (NWMS) * nonlinear elastic wave spectroscopy (NEWS) * exfoliation corrosion
Subject RIV: BI - Acoustics

This work investigates the possibilities of monitoring ongoing corrosion process by acoustic emission (AE) and of determining overall corrosion damage by the nonlinear wave modulation spectroscopy method (NWMS). Specimens made of Al-alloy L-beams simulating stringer reinforcements of airplane structure were studied. The samples were repeatedly immersed in sea salt solution. The acoustic emission activity was recorded in situ during corrosion process. Nonlinear parameters of the samples were measured in between corrosion tests by NWMS method. The current dynamics of a corrosion process was determined by AE, the amount of corrosion damage was corresponding to the nonlinear parameters obtained by NWMS.
Permanent Link: http://hdl.handle.net/11104/0201658