Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1499091 | Scripta Materialia | 2012 | 4 Pages |
Abstract
The Portevin–Le Chatelier effect which is usually associated with discontinuities in plastic flow has been studied in α-brass using an acoustic emission (AE) technique. It is found that intermittent plastic flow in the high-strain-rate regime corresponding to A-type serrations on the stress–strain diagram is accompanied by a continuous AE signal reflecting a smooth dynamics of emitting sources. No individual transient AE signals, which could be associated with rapid dislocation avalanches, have been resolved at different timescales.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
A. Vinogradov, A. Lazarev,