Title:	Microstructure evaluation of new ODS alloys with Fe-Al matrix and Al2O3 particles
Authors:	Khalaj, Omid Jirková, Hana Mašek, Bohuslav Svoboda, Jiří
Citation:	KHALAJ, O., JIRKOVÁ, H., MAŠEK, B., SVOBODA, J. Microstructure evaluation of new ODS alloys with Fe-Al matrix and Al2O3 particles. In: Proceedings of International Conference on Industrial Design Engineering, ICIDE 2017. New York: Association for Computing Machinery, 2017. s. 11-15. ISBN 978-1-4503-4866-9.
Issue Date:	2017
Publisher:	Association for Computing Machinery
Document type:	konferenční příspěvek conferenceObject
URI:	2-s2.0-85049852199 http://hdl.handle.net/11025/30930
ISBN:	978-1-4503-4866-9
Keywords in different language:	microstructure;coarse grain;ODS alloys;steel;Fe-Al;Al2O3
Abstract in different language:	ODS steels are used for their very good mechanical properties at high temperature and low-cost production in comparison with other super alloys (ex. nickel super alloys). The paper describes a new group of Fe-Al Oxide Dispersion Strengthened (ODS) alloys with fine Al2O3 precipitates. ODS ferritic steels are high temperature creep resistant materials, which are intended to be applied more in the future industry. The steel was prepared by powder metallurgy under mechanical alloying and hot consolidation. To describe the stability of this material, annealing with different temperatures and holding times were carried out. The results show that the fine-grained microstructure is stable during long-term annealing up to 800 °C. At temperatures over 1000 °C, the grain structure coarsens by abnormal grain growth by keeping the size of oxides unchanged. Besides, the grain structure of the material is improved by differing the annealing time and temperature. The obtained structures were analyzed by optical and scanning electron microscopy. The mechanical properties and hardness were measured by tensile test at different temperatures.
Rights:	Plný text je přístupný v rámci univerzity přihlášeným uživatelům. © Association for Computing Machinery
Appears in Collections:	Konferenční příspěvky / Conference Papers (RTI) OBD

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