Journal
MATERIALS
Volume 14, Issue 23, Pages -Publisher
MDPI
DOI: 10.3390/ma14237208
Keywords
homogenization; aluminum alloys; phase transformation; differential scanning calorimetry
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Funding
- Slovenian Research Agency (ARRS) [39234]
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The transformation of the Al6Fe metastable phase was analyzed using DSC, optical and SEM, and XRD. A low-impurity alloy was produced in a controlled environment, achieving solidification of the Al6Fe phase with a cooling rate of 35 K/s. Homogenization at 600 degrees C for 2-24 h resulted in the completion of transformation from Al6Fe to Al13Fe4.
Within the scope of this research the transformation of the Al6Fe metastable phase was analyzed via Differential Scanning Calorimetry (DSC), optical and Scanning Electron Microscopy (SEM) and X-ray Diffraction (XRD). A binary Al-Fe1.1 low-impurity alloy was produced with refined raw materials in a controlled environment. With a cooling rate of 35 K/s, solidification of the Al6Fe metastable phase was achieved. The samples were homogenized at 600 degrees C for 2-24 h. Results of a qualitative analysis of metallographic samples show that the transformation began on grain boundaries, forming an Fe-phase free region, but after 2 h began to take place within the eutectic region. The transformation is mostly complete after 12 h, but after 24 h of homogenization it is fully complete as all samples, except the 24 h homogenized one, contain both the metastable Al6Fe and the stable Al13Fe4 phase.
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