Original title: Effect of alloying and thermal processing on mechanical properties of tial alloys
Authors: Chlupová, Alice ; Heczko, Milan ; Obrtlík, Karel ; Beran, Přemysl ; Kruml, Tomáš
Document type: Papers
Conference/Event: MSMF8. International Conference on Materials Structure and Micromechanics of Fracture /8./, Brno (CZ), 20160627
Year: 2017
Language: eng
Abstract: Two -based TiAl alloys with 7 at.% of Nb, alloyed with 2 at.% Mo and 0.5 at.% C, were studied. A heat treatment leading to very fine lamellar microstructure was applied on both alloys. Microstructure after the heat treatment was described and mechanical properties including fatigue behaviour were measured. The as-received material alloyed with C possesses high strength and very limited ductility, especially at RT. After application of selected heat treatment it becomes even more brittle; therefore, this process could be considered as not appropriate for this alloy. On the contrary, in the case of Mo alloyed material, both strength and ductility are improved by the heat treatment at RT and usual working temperature (~750 °C). Presence of the phase is responsible for this effect. The selected heat treatment thus can be an alternative for this alloy to other thermomechanical treatments as high temperature forging.
Keywords: Fatigue; Heat treatment; Lamellar microstructure; Mechanical properties; TiAl alloys
Project no.: GAP107/11/0704 (CEP)
Funding provider: GA ČR
Host item entry: Materials Structure & Micromechanics of Fracture VIII, ISBN 978-3-03835-626-4, ISSN 1662-9779

Institution: Institute of Physics of Materials AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0276855

Permalink: http://www.nusl.cz/ntk/nusl-373284


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