PRESSURE WELDING OF NICKEL-BASED 58Ni-Cr-Mo-B-Al-Cu ALLOY UNDER LOW-TEMPERATURE SUPERPLASTICITY CONDITIONS

E.V. Valitova, R.Y. Lutfullin, M.K. Mukhametrakhimov, V.A. Valitov, A.K. Akhunova, S.V. Dmitriev show affiliations and emails
Received: 02 December 2014; Accepted: 30 December 2014
Citation: E.V. Valitova, R.Y. Lutfullin, M.K. Mukhametrakhimov, V.A. Valitov, A.K. Akhunova, S.V. Dmitriev. PRESSURE WELDING OF NICKEL-BASED 58Ni-Cr-Mo-B-Al-Cu ALLOY UNDER LOW-TEMPERATURE SUPERPLASTICITY CONDITIONS. Lett. Mater., 2014, 4(4) 291-294
BibTex   https://doi.org/10.22226/2410-3535-2014-4-291-294

Abstract

Both the ultrafine-grained (UFG) structure with a grain size (d) less than 1 mm and nanocrystalline (NC) structure (d £ 100 нм) can be processed in nickel-based alloy 58Ni-Cr-Mo-B-Al-Cu using methods severe plastic deformation, in particular, multistep isothermal forging within the temperature range of g+δ - region on Bridgman anvils at strains е=5,5. Pressure welding  performed under conditions of low temperature superplasticity  (T=800оС, έ=10-4с-1) can provide solid state joining of the alloy under study being  in different structure conditions as well as joining of samples with coarse-grained structure using a NC layer.  

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