Portevin–Le Chatelier effect: modeling the deformation bands and stress-strain curves

Tero Mäkinen*, Markus Ovaska, Lasse Laurson, Mikko Alava

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

In the Portevin–Le Chatelier (PLC) effect sample plastic deformation takes place via localized bands. We present a model to account for band dynamics and the variability the bands exhibit. The approach is tuned to account for strain hardening and the strain-rate dependence for the case of so-called type A (propagating) bands. The main experimental features of the fluctuations are a reduction with strain and increase with the strain rate which is reproduced by a model of plastic deformation with Dynamic Strain Aging, including disorder as a key parameter. Extensions are discussed as are the short-comings in reproducing detailed avalanche statistics.
Original languageEnglish
Article number15
Number of pages12
JournalMaterials Theory
Volume6
DOIs
Publication statusPublished - 11 Apr 2022
MoE publication typeA1 Journal article-refereed

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