Influence of phase composition on Portevin-Le Chatelier effect in Al-Mg alloys

16th International Conference of Students and Young Scientists "Prospects of Fundamental Sciences Development"

自然科学（总论）

Borisova, Yu^1 ; Yuzbekova, D.^1 ; Mogucheva, A.^1

Belgorod State University, Belgorod

308015, Russia^1

关键词: Al-Mg alloy;    Apparent activation energy;    Dispersed particle;    PLC-effect;    Portevin-Le Chatelier effects;    Ultra-fine-grained;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/597/1/012057/pdf
DOI  :  10.1088/1757-899X/597/1/012057

学科分类：自然科学（综合）

来源: IOP

【 摘 要 】

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.