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Determination of material quality by methods of thermal analysis

Maja Vončina

Maja Vončina

University of Ljubljana, Faculty of Natural Sciences and Engineering, Department of Materials and MetallurgyLjubljana, Slovenia
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Vončina, Maja
, 
Gregor Hvala

Gregor Hvala

University of Ljubljana, Faculty of Natural Sciences and Engineering, Department of Materials and MetallurgyLjubljana, Slovenia
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Hvala, Gregor
, 
Jožef Medved

Jožef Medved

University of Ljubljana, Faculty of Natural Sciences and Engineering, Department of Materials and MetallurgyLjubljana, Slovenia
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Medved, Jožef
, 
Borut Žužek

Borut Žužek

Institute of Metals and TechnologyLjubljana, Slovenia
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Žužek, Borut
 und 
Mitja Petrič

Mitja Petrič

University of Ljubljana, Faculty of Natural Sciences and Engineering, Department of Materials and MetallurgyLjubljana, Slovenia
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Petrič, Mitja
  
07. Nov. 2022
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Artikel-Kategorie: Original Scientific Article
Online veröffentlicht: 07. Nov. 2022
Seitenbereich: 41 - 49
Eingereicht: 21. Okt. 2021
Akzeptiert: 26. Nov. 2021
DOI: https://doi.org/10.2478/rmzmag-2021-0006
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© 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

(a) Steel mould with a square profile; (b) Casting obtained from the steel mould for tensile specimens.
(a) Steel mould with a square profile; (b) Casting obtained from the steel mould for tensile specimens.

Figure 2

The Scheil cooling curve of the non-equilibrium solidification of (a) sample 239 and (b) sample 239D.
The Scheil cooling curve of the non-equilibrium solidification of (a) sample 239 and (b) sample 239D.

Figure 3

The cooling curve and corresponding derivative of (a) sample 239 and (b) sample 239D.
The cooling curve and corresponding derivative of (a) sample 239 and (b) sample 239D.

Figure 4

Heating (green) and cooling (blue) DSC curve of the sample (a) 239 and (b) 239D.
Heating (green) and cooling (blue) DSC curve of the sample (a) 239 and (b) 239D.

Figure 5

Micrographs of (a and b) sample 239 and (c and d) sample 239D.
Micrographs of (a and b) sample 239 and (c and d) sample 239D.

Figure 6

Micrographs of sample 239 in (a) as-cast state and (b) T6 heat-treated state and of sample 239D (c) in as-cast state and (d) T6 heat-treated state.
Micrographs of sample 239 in (a) as-cast state and (b) T6 heat-treated state and of sample 239D (c) in as-cast state and (d) T6 heat-treated state.

Figure 7

Hardness of AlSi10Mg alloy and AlSi10Mg(Fe) alloy in as-cast state and after heat treatment.
Hardness of AlSi10Mg alloy and AlSi10Mg(Fe) alloy in as-cast state and after heat treatment.

Figure 8

Tensile test results for 239 alloys and 239D alloys in the as-cast state and after heat treatment.
Tensile test results for 239 alloys and 239D alloys in the as-cast state and after heat treatment.

The proportions of phase formed during the solidification_

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

Chemical composition of the alloys investigated in % by weight_

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
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