ISSN: 0090-3973
Page Count: 11

Monitoring Crack Advance Using Acoustic Emission and Combined Acoustic Emission and Potential Drop in Zr-2.5% Nb
Lin, G
University of Alberta, Alberta

Skrzypek, S
Cracow Institute of Mining and Metallurgy, al. Mickiewicz,

Li, D
Central Iron and Steel Research Institute P. R. China,

Eadie, RL
University of Alberta, Alberta

(Received 5 December 1994; accepted 7 May 1995)

Abstract

Experithental results are reported on the application of acoustic emission (AE) and combined acoustic emission and potential drop (PD) in crack advance measurement. Acoustic emission by itself is not a quantitastive technique for measuring crack advance. Compared with the application of only PD, using both simultaneously turns out to be quite beneficial. Used to measure delayed hydride cracking velocity in Zr-2.5% Nb, combined AE and PD, together with other techniques such as fractography, produces more reliable results with higher accuracy for isothermal conditions and particularly during temperature transients. Information about the correlation between AE and PD signals has been also obtained, which improves our understanding of the processes being studied.

Keywords:
acoustic emission (AE), potential drop (PD), crack advance measurement, delayed hydride cracking, Zr-2.5%Nb

Paper ID: JTE11965J
DOI: 10.1520/JTE11965J
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