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ToolsHanna, A., Azzeddine, H., Avettand-Fènoël, M-N., Baudin, T., Huang, Y. and Langdon, T. G., 2024. DSC analysis of dissolution reaction in an as-cast and HPT-processed Mg-Gd alloy. Materials Letters, 376, 137293.
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DOI: 10.1016/j.matlet.2024.137293
Abstract
The dissolution reaction kinetics were determined by differential scanning calorimetry (DSC) analysis for Mg-0.6Gd (wt.%) in an as-cast condition and after processing by high-pressure torsion (HPT) at room temperature for 20 turns. For the as-cast condition, the dissolution temperature was in the range of 634–658 K with an activation energy of 135±9 kJ/mol. After HPT, the range of dissolution temperature decreased to 601–633 K, with a lower activation energy of 118±10 kJ/mol. In both conditions, the Avrami and growth exponents are around 1.5, which suggests that the dissolved precipitates exhibit polyhedron-like morphology and that the dissolution process is dominated by bulk dissolution with a constant rate controlled by diffusion.
| Item Type: | Article |
|---|---|
| ISSN: | 0167-577X |
| Group: | Faculty of Science & Technology |
| ID Code: | 40267 |
| Deposited By: | Symplectic RT2 |
| Deposited On: | 30 Aug 2024 11:00 |
| Last Modified: | 12 Sep 2024 07:23 |
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