Effect of Si and Fe on the Recrystallization Response of Al-Mn Alloys with Zr Addition

• Authors: M. Karlík , T. Mánik , M. Slámová , H. Lauschmann
• Languages of publication: EN

Abstracts

EN

Al-Mn alloys are often used for the production of automotive heat exchanger fins. During brazing at about 600°C, recrystallization and grain coarsening resulting in the reduction of the strength and possible buckling of the fin can occur. In order to obtain a good recrystallization resistance, the alloy should contain a dense and homogeneous distribution of second phase particles. The effect of Si and Fe addition on the recrystallization response of Al-Mn-Zr alloys direct-chill cast in the laboratory conditions and twin-roll cast in the industrial conditions was examined. Microstructure of the alloys was characterized during downstream processing. The particles were analyzed by light metallography, energy dispersive X-ray spectroscopy and by means of electron backscattering diffraction. Computer assisted quantitative particle analysis was carried out on field emission gun-scanning electron microscope micrographs. Vickers hardness and electrical conductivity were measured at thicker sheets, while at the final gauge of 65 μm the 0.2% proof stress was evaluated. The best recrystallization resistance had twin-roll cast alloy containing 0.5 wt% Si and 0.2 wt% Fe.

Keywords

EN

81.40.-z; 81.05.Bx; 81.70.-q

Discipline

• 81.40.-z: Treatment of materials and its effects on microstructure, nanostructure, and properties
• 81.05.Bx: Metals, semimetals, and alloys
• 81.70.-q: Methods of materials testing and analysis(see also 82.80.-d Chemical analysis and related physical methods of analysis)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2012
• Volume: 122
• Issue: 3
• Pages: 469-474

Dates

published

2012-09

Contributors

author

M. Karlík

• Faculty of Nuclear Sciences and Physical Engineering, Department of Materials, Czech Technical University in Prague, Trojanova 13, 120 00 Praha 2, Czech Republic

author

T. Mánik

• Faculty of Nuclear Sciences and Physical Engineering, Department of Materials, Czech Technical University in Prague, Trojanova 13, 120 00 Praha 2, Czech Republic

author

M. Slámová

• Research Institute of Metals, Panenské Břežany, 250 70 Odolena Voda, Czech Republic

author

H. Lauschmann

• Faculty of Nuclear Sciences and Physical Engineering, Department of Materials, Czech Technical University in Prague, Trojanova 13, 120 00 Praha 2, Czech Republic

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Identifiers

DOI

10.12693/APhysPolA.122.469