THE PORTEVIN-LE-CHATELIER EFFECT IN AL-2.92-PERCENT-MG-0.38-PERCENT-MN ALLOY AND LINEAR LOCATION OF ACOUSTIC-EMISSION

Authors
CHMELIK F TROJANOVA Z PREVOROVSKY Z LUKAC P
Citation
F. Chmelik et al., THE PORTEVIN-LE-CHATELIER EFFECT IN AL-2.92-PERCENT-MG-0.38-PERCENT-MN ALLOY AND LINEAR LOCATION OF ACOUSTIC-EMISSION, Materials science & engineering. A, Structural materials: properties, microstructure and processing, 164(1-2), 1993, pp. 260-265
Citations number
29
Categorie Soggetti
Material Science
Journal title
Materials science & engineering. A, Structural materials: properties, microstructure and processing → ACNP
ISSN journal
09215093
Volume
164
Issue
1-2
Year of publication
1993
Pages
260 - 265
Database
ISI
SICI code
0921-5093(1993)164:1-2<260:TPEIA>2.0.ZU;2-Q
Abstract
The Portevin-Le Chatelier (PLC) effect (discontinuous plastic flow) in an Al-2.92%Mg-0.38%Mn alloy deformed at room temperature has been stu died using linear location of acoustic emission (AE). Location distrib utions have been found to be essentially dependent on strain. At the i nitial stage of plastic deformation a significant AE activity was moni tored along the entire gauge length, well tracing the propagation of d eformation bands; subsequently, some AE activity remained in the vicin ity of the sample heads only. The results are discussed in terms of th e present knowledge of the PLC effect and AE and possible mechanisms r esponsible for the observed AE activity are suggested.