title: Comment on "Portevin-Le Chatelier effect".
abstract: Instabilities of plastic flow in alloys and the associated deformation patterns are currently attracting a lot of attention. We comment on a recent investigation by Franklin et al. [Phys. Rev. E 62, 8195 (2000)] on one such type of instability, the Portevin-Le Chatelier effect, attempting to clarify a few points about the instability mechanism as well as the reported experimental results.
authors.affiliation: Laboratoire d'Etude des Microstructures, CNRS-ONERA, 29 Avenue de la Division Leclerc, Boîte Postale 72, 92322 Châtillon Cedex, France.
authors.forename: L P
authors.initials: LP
authors.lastname: Kubin
authors.forename: G
authors.initials: G
authors.lastname: Ananthakrishna
authors.forename: C
authors.initials: C
authors.lastname: Fressengeas