Investigation of Thermophysical Properties of AW-2024-T3 Bare and Clad Aluminum Alloys
In this paper, thermophysical and viscoelastic dynamic mechanical measurements (DMA) were performed for bare and clad aluminum AW-2024-T3 alloys. Specific heat, thermal diffusivity, and dynamic module (storage and loss) tests were performed in the range of 50 to 500 °C, except for DMA ones (RT–400 °...
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MDPI AG
2020-07-01
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| author | Janusz Zmywaczyk Judyta Sienkiewicz Piotr Koniorczyk Jan Godzimirski Mateusz Zieliński |
| author_facet | Janusz Zmywaczyk Judyta Sienkiewicz Piotr Koniorczyk Jan Godzimirski Mateusz Zieliński |
| author_sort | Janusz Zmywaczyk |
| collection | DOAJ |
| description | In this paper, thermophysical and viscoelastic dynamic mechanical measurements (DMA) were performed for bare and clad aluminum AW-2024-T3 alloys. Specific heat, thermal diffusivity, and dynamic module (storage and loss) tests were performed in the range of 50 to 500 °C, except for DMA ones (RT–400 °C). All tests were carried out using the following specialized measuring stands: a light flash apparatus (LFA), differential scanning calorimeter (DSC), and a dynamic mechanical analyzer (DMA). The microstructures and compositions of alloys were investigated by light microscope (LM), scanning electron microscope (SEM), and energy-dispersive X-ray spectroscopy (EDS). Furthermore, Vickers micro-hardness measurements were conducted prior to and after DSC studies. Different precipitation kinetics of the θ′ and S′ metastable phases in the bare 2024-T3 compared to the clad alloy were observed by DSC. Additionally, the DSC results for a few selected scan rates were analyzed by the Kissinger method to give activation energies for the precipitation of θ′ and S′ metastable phases in the alloys. The apparent activation energy of the θ′ and S′ phases corresponds to 137.1 ± 4.4 <inline-formula><math display="inline"><semantics><mrow><mi>kJ</mi><mi>·</mi><msup><mrow><mrow><mtext> </mtext><mi>mol</mi></mrow></mrow><mrow><mo>−</mo><mn>1</mn></mrow></msup></mrow></semantics></math></inline-formula> for the bare alloy and 131.0 ± 6.0 (exo) and 104.1 ± 2.1 (exo) (two peaks) for the clad alloy. |
| first_indexed | 2024-03-10T18:10:31Z |
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| id | doaj.art-d91acdcf5d4341819c4de1adbc7d9c73 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T18:10:31Z |
| publishDate | 2020-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-d91acdcf5d4341819c4de1adbc7d9c732023-11-20T08:09:04ZengMDPI AGMaterials1996-19442020-07-011315334510.3390/ma13153345Investigation of Thermophysical Properties of AW-2024-T3 Bare and Clad Aluminum AlloysJanusz Zmywaczyk0Judyta Sienkiewicz1Piotr Koniorczyk2Jan Godzimirski3Mateusz Zieliński4Faculty of Mechatronics and Aerospace, Military University of Technology, 00-908 Warsaw, PolandFaculty of Mechatronics and Aerospace, Military University of Technology, 00-908 Warsaw, PolandFaculty of Mechatronics and Aerospace, Military University of Technology, 00-908 Warsaw, PolandFaculty of Mechatronics and Aerospace, Military University of Technology, 00-908 Warsaw, PolandFaculty of Mechatronics and Aerospace, Military University of Technology, 00-908 Warsaw, PolandIn this paper, thermophysical and viscoelastic dynamic mechanical measurements (DMA) were performed for bare and clad aluminum AW-2024-T3 alloys. Specific heat, thermal diffusivity, and dynamic module (storage and loss) tests were performed in the range of 50 to 500 °C, except for DMA ones (RT–400 °C). All tests were carried out using the following specialized measuring stands: a light flash apparatus (LFA), differential scanning calorimeter (DSC), and a dynamic mechanical analyzer (DMA). The microstructures and compositions of alloys were investigated by light microscope (LM), scanning electron microscope (SEM), and energy-dispersive X-ray spectroscopy (EDS). Furthermore, Vickers micro-hardness measurements were conducted prior to and after DSC studies. Different precipitation kinetics of the θ′ and S′ metastable phases in the bare 2024-T3 compared to the clad alloy were observed by DSC. Additionally, the DSC results for a few selected scan rates were analyzed by the Kissinger method to give activation energies for the precipitation of θ′ and S′ metastable phases in the alloys. The apparent activation energy of the θ′ and S′ phases corresponds to 137.1 ± 4.4 <inline-formula><math display="inline"><semantics><mrow><mi>kJ</mi><mi>·</mi><msup><mrow><mrow><mtext> </mtext><mi>mol</mi></mrow></mrow><mrow><mo>−</mo><mn>1</mn></mrow></msup></mrow></semantics></math></inline-formula> for the bare alloy and 131.0 ± 6.0 (exo) and 104.1 ± 2.1 (exo) (two peaks) for the clad alloy.https://www.mdpi.com/1996-1944/13/15/33452024-T3 bare and clad alloysthermophysical propertiesviscoelastic propertiesactivation energy |
| spellingShingle | Janusz Zmywaczyk Judyta Sienkiewicz Piotr Koniorczyk Jan Godzimirski Mateusz Zieliński Investigation of Thermophysical Properties of AW-2024-T3 Bare and Clad Aluminum Alloys Materials 2024-T3 bare and clad alloys thermophysical properties viscoelastic properties activation energy |
| title | Investigation of Thermophysical Properties of AW-2024-T3 Bare and Clad Aluminum Alloys |
| title_full | Investigation of Thermophysical Properties of AW-2024-T3 Bare and Clad Aluminum Alloys |
| title_fullStr | Investigation of Thermophysical Properties of AW-2024-T3 Bare and Clad Aluminum Alloys |
| title_full_unstemmed | Investigation of Thermophysical Properties of AW-2024-T3 Bare and Clad Aluminum Alloys |
| title_short | Investigation of Thermophysical Properties of AW-2024-T3 Bare and Clad Aluminum Alloys |
| title_sort | investigation of thermophysical properties of aw 2024 t3 bare and clad aluminum alloys |
| topic | 2024-T3 bare and clad alloys thermophysical properties viscoelastic properties activation energy |
| url | https://www.mdpi.com/1996-1944/13/15/3345 |
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