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Effect of alloying on elastic properties of ternary Ni-Al-Ti system: Experimental validation
National University of Science and Technology MISIS, Russia; RAS, Russia.
National University of Science and Technology MISIS, Russia.
National University of Science and Technology MISIS, Russia.
Linköping University, Department of Physics, Chemistry and Biology, Theoretical Physics. Linköping University, Faculty of Science & Engineering.
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2016 (English)In: Journal of Alloys and Compounds, ISSN 0925-8388, E-ISSN 1873-4669, Vol. 688, 534-541 p.Article in journal (Refereed) Published
Abstract [en]

Using combustion synthesis approach we fabricated B2 NiAl intermetallic compound as well as quasibinary Ni(Al50Ti50) alloy, where half Al atoms are randomly substituted by transitional metal Ti. Youngs modulus for synthesized materials was measured and appeared to be 222 +/- 10 GPa for NiAl and 175 +/- 15 GPa for Ni(Al50Ti50) phases. Using first-principles simulations in the framework of the Density Functional Theory, we investigate the elastic properties of Ni(Al1-xTix) system, including single-crystal, as well as polycrystalline elastic moduli. Direct comparison of the experimental and theoretical values of the Youngs modulus demonstrates that the employed theoretical approach allows carefully predict elastic properties of NiAl-based intermetallics. In particular, we predict that alloying NiAl with Ti should increase the ductility of the intermetallic phase. (C) 2016 Elsevier B.V. All rights reserved.

Place, publisher, year, edition, pages
ELSEVIER SCIENCE SA , 2016. Vol. 688, 534-541 p.
Keyword [en]
Combustion synthesis; NiAl-based superalloys; Ti doping; Module of elasticity; First-principles simulations; Ductility
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:liu:diva-132464DOI: 10.1016/j.jallcom.2016.07.051ISI: 000384430800070OAI: oai:DiVA.org:liu-132464DiVA: diva2:1046284
Note

Funding Agencies|Ministry of Education and Science of the Russian Federation [14.Y26.31.0005, K2-2014-001]; Tomsk State University Academic D. I. Mendeleev Fund Program [8.1.18.2015]; Swedish Foundation for Strategic Research (SSF) program SRL Grant [10-0026]; Swedish Research Council (VR) [2015-04391]; Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University (Faculty Grant SFO-Mat-LiU) [2009 00971]; Russian Foundation for Basic Researches [16-02-00797 a]

Available from: 2016-11-13 Created: 2016-11-12 Last updated: 2016-11-13

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Abrikosov, IgorSkripnyak, Natalia
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