On the Influence of Casting Cooling Rates on the Mechanical Properties of the Ti$_{50}$Ni$_{41}$Nb$_{8}$Ta$_{1}$ Alloy

S. M. Kedrovsky$^{1}$, Yu. M. Koval$^{1}$, V. M. Slipchenko$^{1}$, K. V. Slipchenko$^{2}$, O. V. Filatov$^{2}$

$^{1}$G.V. Kurdyumov Institute for Metal Physics, NAS of Ukraine, 36 Academician Vernadsky Blvd., UA-03142 Kyiv, Ukraine
$^{2}$National Technical University of Ukraine ‘Igor Sikorsky Kyiv Polytechnic Institute’, 37 Peremohy Ave., UA-03056 Kyiv, Ukraine

Received: 09.09.2014; final version - 30.12.2104. Download: PDF

Indentation method is used to study characteristics of hardness and ductility of the Ti$_{50}$Ni$_{41}$Nb$_{8}$Ta$_{1}$ alloy with shape-memory effect in as cast condition. The objects of the study are samples prepared in the form of special castings with a variable cross-section with stepped diameters that gives an opportunity to obtain different cooling rates in one cast sample. As found at high cooling rates, a change of the deformation pattern during indentation caused by martensitic transformation under load takes place. This feature can significantly affect the mechanical properties of the alloy that potentially results in change of deformation mechanism for alloys under load.

Key words: hardness, ductility, shape-memory effect, indentation, cooling rate, Nitinol.

URL: http://mfint.imp.kiev.ua/en/abstract/v37/i02/0199.html

DOI: https://doi.org/10.15407/mfint.37.02.0199

PACS: 61.72.Ff, 62.20.fg, 62.20.fk, 62.20.Qp, 68.70.+w, 81.30.Kf, 81.40.Ef

Citation: S. M. Kedrovsky, Yu. M. Koval, V. M. Slipchenko, K. V. Slipchenko, and O. V. Filatov, On the Influence of Casting Cooling Rates on the Mechanical Properties of the Ti$_{50}$Ni$_{41}$Nb$_{8}$Ta$_{1}$ Alloy, Metallofiz. Noveishie Tekhnol., 37, No. 2: 199—208 (2015) (in Russian)

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