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)


REFERENCES
  1. M. L. Bernshtein and V. A Zaymovskiy, Mekhanicheskie Svoystva Metallov (Mechanical Properties of Metals) (Moscow: Metallurgiya: 1979) (in Russian).
  2. V. M. Slipchenko, Vliyanie Serebra, Tantala i Tekhnologicheskikh Faktorov na Strukturu i Svoystva Splavov s Pamyat'yu Formy na Osnove Ti–Ni (Effect of Silver, Tantalum, and Technological Factors on Structure and Properties of Ti–Ni-Based Shape-Memory Alloys) (Thesis of Disser. … for the Degree of Cand. Techn. Sci.) (Kiev: G. V. Kurdyumov Institute for Metal Physics, N.A.S. of Ukraine: 2013) (in Russian).
  3. Yu. M. Koval', V. M. Slipchenko, V. M. Slipchenko, T. G. Sych, and Z. Yu. Khrystych, Metallofiz. Noveyshie Tekhnol., 24, No. 12: 1721 (2002) (in Ukrainian).
  4. V. M. Slipchenko, Yu. N. Koval, and O. V. Koshovy, International Conference on Martensitic Transformations ICOMAT-2002 (June 10–14, 2002, Espoo, Finland), p.717.
  5. Yu. V. Milman, B. A. Galanov, and S. I. Chugunova, Acta Met. Mater., 41, No. 9: 2523 (1993). Crossref
  6. B. A. Galanov, Yu. V. Milman, S. I. Chugunova, and I. V. Goncharova, Superhard Materials, No. 3: 23 (1999).
  7. Yu. V. Milman, J. Phys. D: Appl. Phys., 41: 074013 (2008). Crossref
  8. Yu. V. Milman, S. Dub, and A. Golubenko, Mater. Res. Soc. Symp. Proc., 1049: 123 (2008).
  9. I. V. Gridneva, Yu. V. Milman, and V. I. Trefilov, phys. status solidi (a), 14: 177 (1972). Crossref
  10. Yu. V. Milman, S. I. Chugunova, and I. V. Goncharova, Elektronnaya Mikroskopiya i Prochnost' Materialov: Sb. Nauchn. Trudov (Electron Microscopy and Toughness of Materials: Collected Scientific Transactions) (Kiev: IPM NANU: 2008), Iss. 15, p. 3 (in Russian).
  11. A. V. Kuz'menko, A. M. Shumeyko, and V. V. Kravchenko, Zubnoe Protezirovanie, No. 2: 42 (2009) (in Russian).
  12. K. Otsuka, K. Shimizu, and Y. Suzuki, Splavy s Effektom Pamyati Formy (Shape-Memory Alloys) (Moscow: Metallurgiya: 1990) (Russian translation).