<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>Cast aluminium alloys are commonly used in the automotive industry for casting applications. There are both primary and secondary/recycled aluminium alloys in the market, which differ in price and quality. In this study, the effect of alloy quality on solidification, microstructure and mechanical properties was investigated. The comparison of properties was carried out in the as-cast condition and in the heat-treated condition. The influence of alloy quality on solidification was analysed by simple thermal analysis and differential scanning calorimetry, and thermodynamic simulations. The basic mechanical properties analysed were tensile strength, yield strength, elongation, and hardness. The microstructural differences were analysed using a light microscope. The Mn:Fe ratio, which is strongly influenced by the alloy quality, was found to have a pronounced effect on the mechanical properties, while magnesium together with silicon hardens the aluminium matrix during heat treatment, which significantly increases the mechanical properties. This research proved that thermal analysis methods can give us a necessary and important indication of the quality of the alloys used.</p>
</abstract>

Cast aluminium alloys are commonly used in the automotive industry for casting applications. There are both primary and secondary/recycled aluminium alloys in the market, which differ in price and quality. In this study, the effect of alloy quality on solidification, microstructure and mechanical properties was investigated. The comparison of properties was carried out in the as-cast condition and in the heat-treated condition. The influence of alloy quality on solidification was analysed by simple thermal analysis and differential scanning calorimetry, and thermodynamic simulations. The basic mechanical properties analysed were tensile strength, yield strength, elongation, and hardness. The microstructural differences were analysed using a light microscope. The Mn:Fe ratio, which is strongly influenced by the alloy quality, was found to have a pronounced effect on the mechanical properties, while magnesium together with silicon hardens the aluminium matrix during heat treatment, which significantly increases the mechanical properties. This research proved that thermal analysis methods can give us a necessary and important indication of the quality of the alloys used.

Determination of material quality by methods of thermal analysis

Faculty of Natural Sciences and Engineering, Department of Materials and Metallurgy

Materials and Geoenvironment

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Ugotavljanje kakovosti materiala z metodami termične analize

Cast aluminium alloys are commonly used in the automotive industry for casting applications. There are both primary and secondary/recycled aluminium alloys in...

Phase / Sample	239	239D
α-Al	87.00	85.20
β-Si (eutectic)	9.91	9.74
α-Al₁₅(Fe,Mn)₃Si₂	0.89	1.03
β-Al₅FeSi	1.31	3.26
Mg₂Si	0.86	0.65
Q-Al₅Cu₂Mg₈Si₆	0.02	0.11

Sample	Si	Fe	Cu	Mn	Mg	Ni
239	10.398	0.3548	0.005	0.2654	0.5513	0.0038
239D	10.439	0.8788	0.0229	0.3092	0.4459	0.0062
Sample	Zn	Pb	Sn	Ti	Sr	Al	Mn:Fe
239	0.0039	0.001	0.0003	0.0983	0.0369	rest	0.748
239D	0.0167	0.001	0.0004	0.0253	0.0015	rest	0.352

Determination of material quality by methods of thermal analysis

Article Category: Original Scientific Article

Data publikacji: 07 lis 2022

Zakres stron: 41 - 49

Otrzymano: 21 paź 2021

Przyjęty: 26 lis 2021

DOI: https://doi.org/10.2478/rmzmag-2021-0006

Słowa kluczowe
Alloy quality, casting alloys, thermal analysis, solidification, microstructure, mechanical properties

© 2021 Maja Vončina et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

The proportions of phase formed during the solidification.

Chemical composition of the alloys investigated in % by weight.

Determination of material quality by methods of thermal analysis

Article Category: Original Scientific Article

Data publikacji: 07 lis 2022

Zakres stron: 41 - 49

Otrzymano: 21 paź 2021

Przyjęty: 26 lis 2021

DOI: https://doi.org/10.2478/rmzmag-2021-0006

Słowa kluczoweAlloy quality, casting alloys, thermal analysis, solidification, microstructure, mechanical properties

© 2021 Maja Vončina et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

The proportions of phase formed during the solidification.

Chemical composition of the alloys investigated in % by weight.

Słowa kluczowe
Alloy quality, casting alloys, thermal analysis, solidification, microstructure, mechanical properties