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Effect of alloying and thermal processing on mechanical properties of tial alloys
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SYSNO ASEP 0480159 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Effect of alloying and thermal processing on mechanical properties of tial alloys Author(s) Chlupová, Alice (UFM-A) RID, ORCID
Heczko, Milan (UFM-A) ORCID
Obrtlík, Karel (UFM-A) RID, ORCID
Beran, Přemysl (UJF-V) RID, ORCID, SAI
Kruml, Tomáš (UFM-A) RID, ORCIDNumber of authors 5 Source Title Materials Structure & Micromechanics of Fracture VIII. - Zürrich : Trans Tech Publications, 2017 / Šandera P. - ISSN 1662-9779 - ISBN 978-3-03835-626-4 Pages s. 501-505 Number of pages 5 s. Publication form Print - P Action MSMF8. International Conference on Materials Structure and Micromechanics of Fracture /8./ Event date 27.06.2016 - 29.06.2016 VEvent location Brno Country CZ - Czech Republic Event type WRD Language eng - English Country CH - Switzerland Keywords Fatigue ; Heat treatment ; Lamellar microstructure ; Mechanical properties ; TiAl alloys Subject RIV JL - Materials Fatigue, Friction Mechanics OECD category Audio engineering, reliability analysis Subject RIV - cooperation Nuclear Physics Institute - Materials Fatigue, Friction Mechanics R&D Projects GAP107/11/0704 GA ČR - Czech Science Foundation (CSF) Institutional support UFM-A - RVO:68081723 ; UJF-V - RVO:61389005 EID SCOPUS 85009765481 DOI 10.4028/www.scientific.net/SSP.258.501 Annotation 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. Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2018
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