Structural and Mechanical Changes of AlMgSi0.5 Alloy during Extrusion by ECAP Method

@article{63283,
   author = {Harničárová, Marta and Valíček, Jan and Kušnerová, Milena and Kopal, Ivan and Lupták, Miloslav and Mikuš, Rastislav and Pavelek, Zdeněk and Fabián, Martin and Šepeľák, Vladimír},
   article_location = {Basel, Switzerland},
   article_number = {6},
   keywords = {aluminium alloy; intensive plastic deformation method; microstructure; mechanical properties},
   language = {eng},
   issn = {1996-1944},
   journal = {Materials},
   title = {Structural and Mechanical Changes of AlMgSi0.5 Alloy during Extrusion by ECAP Method},
   url = {https://www.mdpi.com/1996-1944/15/6/2020},
   volume = {15/2022},
   year = {2022}
}

TY  - JOUR
ID  - 63283
AU  - Harničárová, Marta - Valíček, Jan - Kušnerová, Milena - Kopal, Ivan - Lupták, Miloslav - Mikuš, Rastislav - Pavelek, Zdeněk - Fabián, Martin - Šepeľák, Vladimír
PY  - 2022
TI  - Structural and Mechanical Changes of AlMgSi0.5 Alloy during Extrusion by ECAP Method
JF  - Materials
VL  - 15/2022
IS  - 6
SP  - nestránkováno
EP  - nestránkováno
PB  - MDPI, ST ALBAN-ANLAGE 66, CH-4052 BASEL, SWITZERLAND
SN  - 19961944
KW  - aluminium alloy
KW  - intensive plastic deformation method
KW  - microstructure
KW  - mechanical properties
UR  - https://www.mdpi.com/1996-1944/15/6/2020
N2  - SPD (several plastic deformations) methods make it possible to obtain an ultrafine-grained structure (UFG) in larger volumes of material and thus improve its mechanical properties. The presented work focuses on the structural and mechanical changes of aluminium alloy AlMgSi0.5 (EN AW 6060) during processing by repeated extrusion through the ECAP rectangular channel. After a four-pass extrusion, the samples’ microstructures were observed using an optical microscope, where refinement of the material grains was confirmed. Tensile tests determined the extrusion forces and allowed interpretation of the changes in the mechanical properties of the stressed alloy. The grain size was refined from 28.90 μm to 4.63 μm. A significant improvement in the strength of the material (by 45%) and a significant deterioration in ductility (to 60%) immediately after the first extrusion was confirmed. The third pass through the die appeared to be optimal for the chosen deformation path, while after the fourth pass, micro-cracks appeared, significantly reducing the strength of the material. Based on the measurement results, new analytical equations were formulated to predict the magnitude or intensity of the volumetric and shape deformations of the structural grain size and, in particular, the adequate increase in the strength and yield point of the material.
ER  - 

HARNIČÁROVÁ, Marta, Jan VALÍČEK, Milena KUŠNEROVÁ, Ivan KOPAL, Miloslav LUPTÁK, Rastislav MIKUŠ, Zdeněk PAVELEK, Martin FABIÁN and Vladimír ŠEPEĽÁK. Structural and Mechanical Changes of AlMgSi0.5 Alloy during Extrusion by ECAP Method. \textit{Materials}. Basel, Switzerland: MDPI, ST ALBAN-ANLAGE 66, CH-4052 BASEL, SWITZERLAND, 15/2022, No~6, p.~nestránkováno, 22 pp. ISSN~1996-1944. 2022.