Temperature measurements during induction skull melting of titanium aluminide
| Autor: | M. Wickins, R. A. Harding |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Titanium aluminide
Materials science Argon Mechanical Engineering Metallurgy chemistry.chemical_element Partial pressure Cermet Condensed Matter Physics Temperature measurement law.invention Superheating chemistry.chemical_compound chemistry Mechanics of Materials law Thermocouple General Materials Science Pyrometer |
| Zdroj: | Materials Science and Technology. 19:1235-1246 |
| ISSN: | 1743-2847 0267-0836 |
| DOI: | 10.1179/026708303225005944 |
| Popis: | An immersion thermocouple and a twin wavelength infrared radiation pyrometer have been used to measure the temperature of titanium aluminide during melting in an induction skull melting furnace. A molybdenum-alumina cermet thermocouple sheath has been found to survive for long enough to enable about three reliable measurements to be made. A significant drift occurred between the temperatures measured using the pyrometer and the thermocouple when melting under a partial pressure of argon, and has been attributed to the generation of fume inside the melting vessel. The drift did not occur when melting was carried out in a continuously pumped vacuum. The superheat obtained increased from ~33°C when melting 4·5 kg of TiAl with 200 kW in a vacuum to ~44°C and ~62°C when melting under argon partial pressures of 20 and 80 kPa respectively. There appears to be little benefit from increasing the applied power from 200 to 350 kW. |
| Databáze: | OpenAIRE |
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