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Effect of heat treatments with a pointed cooling on the mechanical compression properties of TiAl intermetalic
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SYSNO ASEP 0354170 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Effect of heat treatments with a pointed cooling on the mechanical compression properties of TiAl intermetalic Author(s) Petrenec, Martin (UFM-A)
Kruml, Tomáš (UFM-A) RID, ORCID
Zemanová, Adéla (UFM-A) RID, ORCID
Krahula, Karel (UFM-A)Source Title Metal 2010. 19th International conference on metallurgy and materials - Conference Proceedings. - Ostrava : Tanger s.r.o., 2010 - ISBN 978-80-87294-17-8 Pages s. 828-833 Number of pages 6 s. Action Metal 2010. International Conference on Metallurgy and Materials /19./ Event date 18.05.2010-20.05.2010 VEvent location Rožnov pod Radhoštěm Country CZ - Czech Republic Event type EUR Language eng - English Country CZ - Czech Republic Keywords graded cooling heat treatments ; DTA curve ; TiAl-8Nb intermetallics ; fully lamellar microstructure ; compression tests Subject RIV JL - Materials Fatigue, Friction Mechanics R&D Projects GA106/08/1631 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z20410507 - UFM-A (2005-2011) UT WOS 000286658700143 Annotation The influence of the graded cooling heat treatments on a change in the structure and the room temperature mechanical compression properties of cast Ti-44Al-8Nb intermetallic were studied. The coolings were the air cooling and the graded cooling which was composed of combination of furnace cooling and air cooling for selected two temperatures 1315 °C and 1200 °C. These selected temperatures were used from the measuring of the differential thermal analysis (DTA). All heat treatments used remold the cast nearly lamellar structure ?/?2 to the fully lamellar uniform structure and decreased the average grain size to the half. The air cooling and the graded cooling with temperature 1315 °C were produced in higher yield stress and lower plasticity due the very thin lamellar thickness and planar grain boundary. While higher plasticity and lower yield stress are obtained using the graded cooling with temperature 1200 °C. It is caused by the very thick lamellar spacing and locked grain boundaries. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2011
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