Acoustic Emission from Crack Growth in 7050 Aluminum and 7075 Aluminum as a Function of Temperature and Heat Treatment
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Begun in 1973, the Review of Progress in Quantitative Nondestructive Evaluation (QNDE) is the premier international NDE meeting designed to provide an interface between research and early engineering through the presentation of current ideas and results focused on facilitating a rapid transfer to engineering development.
This site provides free, public access to papers presented at the annual QNDE conference between 1983 and 1999, and abstracts for papers presented at the conference since 2001.
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Abstract
Acoustic emission from 7075 aluminum during tensile deformation or cyclic loading has been the subject of investigations by many authors [1–9]. The acoustic emission source mechanism during fatigue crack propagation was initially believed to be the fracture of.Mg2Si intermetallic inclusions which play a strong role in the crack propagation process. Recent work has clearly demonstrated, however, that the mechanism is related to localized yielding or incremental separation of the crack face surfaces as the fatigue crack advances [7, 8, 9].