Effect of plastic deformation on microstructure and thermoelectric properties of Mg2Sn alloys
| Autor: | Rameshkumar Ramkaran Varma, Sitarama R. Kada, Matthew Barnett |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
lcsh:TN1-997
Materials science Alloy 02 engineering and technology engineering.material 01 natural sciences Thermal conductivity 0103 physical sciences Thermoelectric effect Magnesium Composite material lcsh:Mining engineering. Metallurgy 010302 applied physics Thermoelectric Metals and Alloys 021001 nanoscience & nanotechnology Microstructure Deformation Grain size Mechanics of Materials engineering Substructure Grain boundary Deformation (engineering) 0210 nano-technology |
| Zdroj: | Journal of Magnesium and Alloys, Vol 9, Iss 1, Pp 123-129 (2021) |
| ISSN: | 2213-9567 |
| Popis: | In the present work, the effect of deformation on microstructure and thermoelectric properties of Mg2Sn alloys having excess magnesium concentrations is examined. The cast alloys were prepared using radio-frequency (RF) induction melting under an argon atmosphere. These alloys were thermo‐mechanically processed via compression at different temperatures to various true strains. At room temperature, the alloys failed at a true strain of ∼13%. However, at elevated temperatures, the alloys were observed to be highly plastic. For alloys compressed at 673 K to a true strain of 1, a prominent substructure formed. The subgrain size was ∼3–5 µm. It is believed that the substructure arose from the action of dynamic recovery. Following deformation, the thermoelectric performance of alloy prepared with 6.7 wt.% excess Mg was improved compared to the as cast condition. This can be ascribed to a reduction in the thermal conductivity due to phonon scattering at grain boundaries. |
| Databáze: | OpenAIRE |
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