Open AccessInfluence of phase composition on Portevin-Le Chatelier effect in Al-Mg alloys
Author(s) -
Yu. I. Borisova,
Diana Yuzbekova,
Anna Mogucheva
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/597/1/012057
Subject(s) - portevin–le chatelier effect , materials science , activation energy , phase (matter) , aluminium , strain rate , strain (injury) , metallurgy , dynamic strain aging , thermodynamics , chemistry , physics , medicine , organic chemistry
The temperature-strain rate domain of the Portevin-Le Chatelier (PLC) effect has been determined for three ultrafine grained aluminum alloys: Al-3Mg (A1), Al-4,57Mg-0,35Mn-0,2Sc-0,09Zr (A2) and Al-5,4Mg-0,52Mn-0,1Zr (A3) (wt.%). The apparent activation energy of the serrated yielding was estimated. It was found that the presence of dispersed particles leads to a decrease in the activation energy and the temperature–strain rate domain of the PLC effect becomes narrower.