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Demountable thermomechanical joints of pipelines using couplings made of Ti–Ni–Fe and Ti–Ni–Nb shape-memory alloys

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Abstract

The pilot method for producing a demountable thermomechanical joint of pipelines using couplings made of shape-memory alloys based on titanium nickelide modified by iron or niobium is developed. The properties of Ti–Ni–Fe and Ti–Ni–Nb alloys are studied; i.e., their elemental and phase composition is determined, their microstructure is examined, the phase-transition temperatures are found, the as well as their mechanical and thermomechanical characteristics are determined. In the developed method for producing the demountable thermomechanical joint of pipelines 6 to 36 mm in diameter using couplings made of Ti–Ni–Fe and Ti–Ni–Nb alloys, the best version is to involve the effect of reversible shape memory of the coupling material. A comparison of joints using couplings made of these alloys show that the application of couplings made of Ti–Ni–Nb alloy is more preferable than the application of couplings made of Ti–Ni–Fe alloy.

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Authors and Affiliations

  1. Russian Federal Nuclear Center “All-Russian Research Institute of Experimental Physics,”, pr. Muzrukova 10, Sarov, Nizhegorodskaya oblast, 607188, Russia

    N. N. Popov, V. F. Lar’kin, D. V. Presnyakov, A. A. Aushev, T. I. Sysoeva, A. A. Kostyleva & E. B. Suvorova

Authors
  1. N. N. Popov
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  2. V. F. Lar’kin
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  3. D. V. Presnyakov
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  4. A. A. Aushev
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  5. T. I. Sysoeva
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  6. A. A. Kostyleva
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  7. E. B. Suvorova
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Corresponding author

Correspondence to N. N. Popov.

Additional information

Original Russian Text © N.N. Popov, V.F. Lar’kin, D.V. Presnyakov, A.A. Aushev, T.I. Sysoeva, A.A. Kostyleva, E.B. Suvorova, 2015, published in Problemy Mashinostroeniya i Nadezhnosti Mashin, 2015, No. 6, pp. 81–91.

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Popov, N.N., Lar’kin, V.F., Presnyakov, D.V. et al. Demountable thermomechanical joints of pipelines using couplings made of Ti–Ni–Fe and Ti–Ni–Nb shape-memory alloys. J. Mach. Manuf. Reliab. 44, 555–564 (2015). https://doi.org/10.3103/S1052618815060126

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  • DOI: https://doi.org/10.3103/S1052618815060126

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