Autowave nature of the Lüders deformation in a substitutional FCC alloy

•The occurrence of Lüders deformation in an Al-Mg alloy depends on the strain rate.•At the strain rate less than 2·10−4 s−1 a serrated yield plateau is observed.•The discrete kinetics of Lüders fronts is controlled by dynamic strain aging.•The discrete motion of Lüders fronts is an excitation autowa...

Full description

Saved in:
Bibliographic Details
Published in:Materials letters 2023-10, Vol.349, p.134842, Article 134842
Main Authors: Danilov, Vladimir, Orlova, Dina, Gorbatenko, Vadim, Danilova, Lidiya, Zuev, Lev
Format: Article
Language:English
Subjects:
Autowaves
Dislocations
Dynamic strain aging
Lüders band
Plasticity
Portevin–Le Chatelier effect
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:•The occurrence of Lüders deformation in an Al-Mg alloy depends on the strain rate.•At the strain rate less than 2·10−4 s−1 a serrated yield plateau is observed.•The discrete kinetics of Lüders fronts is controlled by dynamic strain aging.•The discrete motion of Lüders fronts is an excitation autowave of localized plasticity. Lüders deformation in an aluminum-magnesium alloy was studied in a wide range of loading rates. It was found that the deformation is always accompanied by the propagation of deformation fronts, which move either continuously or intermittently depending on the strain rate. The kinetics of fronts is determined by the reaction of active deformable media to an external mechanical action and is determined by the autowave nature of plastic deformation.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2023.134842