The Evolution of Microstructure and Mechanical Properties of Al-Mn-Fe-Si Alloys During Isothermal Annealing

• Authors: M. Poková , M. Zimina , M. Cieslar
• Languages of publication: EN

Abstracts

EN

Recrystallization during isothermal annealing is studied in a twin-roll cast Al-Mn-Fe-Si alloy with Zr addition. Al₃Zr precipitates, which are known to improve the recrystallization resistance by exerting the Zener drag on migrating grain boundaries, form during heat treatment at 450°C. Materials with and without Al₃Zr precipitates are subjected to 4 passes of equal channel angular pressing at room temperature and a submicrometric grain size is achieved. In the course of isothermal annealing materials recrystallize at 400°C, 425°C and 450°C. The time required for recrystallization follows an Arrhenius equation. Recrystallization kinetics is similar independently of the presence of Al₃Zr precipitates. Precipitation of α-Al(Mn,Fe)Si particles is thought to increase the recrystallization resistance in the material without Al₃Zr.

Keywords

EN

68.37.Lp; 68.37.Hk; 81.30.Mh; 81.40.Ef; 61.72.Mm

Discipline

• 68.37.Lp: Transmission electron microscopy (TEM)
• 81.40.Ef: Cold working, work hardening; annealing, post-deformation annealing, quenching, tempering recovery, and crystallization
• 61.72.Mm: Grain and twin boundaries
• 68.37.Hk: Scanning electron microscopy (SEM) (including EBIC)
• 81.30.Mh: Solid-phase precipitation(for precipitation hardening, see 81.40.Cd)

• Journal: Acta Physica Polonica A
• Year: 2015
• Volume: 128
• Issue: 4
• Pages: 746-749

Dates

published

2015-10

Contributors

author

M. Poková

• Charles University in Prague, Faculty of Mathematics and Physics, Department of Physics of Materials, Ke Karlovu 5, Prague 2, 121 16, Czech Republic

author

M. Zimina

• Charles University in Prague, Faculty of Mathematics and Physics, Department of Physics of Materials, Ke Karlovu 5, Prague 2, 121 16, Czech Republic

author

M. Cieslar

• Charles University in Prague, Faculty of Mathematics and Physics, Department of Physics of Materials, Ke Karlovu 5, Prague 2, 121 16, Czech Republic

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Identifiers

DOI

10.12693/APhysPolA.128.746