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Using thermomechanical treatments to improve the grain growth of new-generation ODS alloys

Citace:
KHALAJ, O., JIRKOVÁ, H., MAŠEK, B., HASSASROUDSARI, P., STUDECKÝ, T., SVOBODA, J. Using thermomechanical treatments to improve the grain growth of new-generation ODS alloys. Materiali in Tehnologije, 2018, roč. 52, č. 4, s. 475-482. ISSN: 1580-2949
Druh: ČLÁNEK
Jazyk publikace: eng
Anglický název: Using thermomechanical treatments to improve the grain growth of new-generation ODS alloys
Rok vydání: 2018
Autoři: Dr. Omid Khalaj , Dr. Ing. Hana Jirková , Prof. Dr. Ing. Bohuslav Mašek , I Parsa Hassasroudsari , Tomáš Studecký , Jiří Svoboda
Abstrakt EN: In order to achieve specific mechanical properties and structures of a material, a combination of new technologies together with an unconventional use of different types of materials could be an asset. Powder metallurgy, involving a metal matrix and dispersed stable particles, in combination with mechanical alloying and hot consolidation could be a solution. This paper describes the thermomechanical characteristics of new oxide-dispersion-strengthened (ODS) alloys with a Fe-Al matrix in terms of changes in the grain-size distribution. Recrystallization and grain growth were investigated over a range of temperatures and deformations. The results show that the grain-growing process in the new ODS alloys is significantly affected by the thermomechanical treatment, leading to the maximum grain size within 20-h annealing at 1200 °C. They are analysed using different methods, including optical microscopy.
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