Experimental validation of error in temperature measurements in thin walled ductile iron castings

Research output: Contribution to journalJournal article – Annual report year: 2007Researchpeer-review

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An experimental analysis has been performed to validate the measurement error of cooling curves measured in thin walled ductile cast iron. Specially designed thermocouples with Ø0.2 mm thermocouple wire in Ø1.6 mm ceramic tube was used for the experiments. Temperatures were measured in plates with thicknesses between 2 and 4.3 mm. The thermocouples were accurately placed at the same distance from the surface of the casting for different plate thicknesses. It is shown that when measuring the temperature in plates with thickness between 2 and 4.3 mm the measured temperature will be parallel shifted to a level about 20C lower than the actual temperature in the casting. Factors affecting the measurement error (oxide layer on the thermocouple wire, penetration into the ceramic tube and variation in placement of thermocouple) are discussed. Finally, it is shown how useful cooling curve may be obtained in thin walled castings
Original languageEnglish
JournalInternational Journal of Cast Metals Research
Volume20
Issue number2
Pages (from-to)84-89
ISSN1364-0461
DOIs
Publication statusPublished - 2007

Bibliographical note

Publishers homepage: www.ingentaconnect.com/content/maney

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    Research areas

  • Cast iron, Temperature measurement, Thin-walled castings, Thermocouple, White eutectic

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