Effect of alloying on elastic properties of ternary Ni-Al-Ti system: Experimental validation
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
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.
Combustion synthesis; NiAl-based superalloys; Ti doping; Module of elasticity; First-principles simulations; Ductility
Condensed Matter Physics
IdentifiersURN: urn:nbn:se:liu:diva-132464DOI: 10.1016/j.jallcom.2016.07.051ISI: 000384430800070OAI: oai:DiVA.org:liu-132464DiVA: diva2:1046284
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 [22.214.171.1245]; 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]2016-11-132016-11-122016-11-13