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

doi:10.22226/2410-3535-2014-4-291-294

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=800^оС, 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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PRESSURE WELDING OF NICKEL-BASED 58Ni-Cr-Mo-B-Al-Cu ALLOY UNDER LOW-TEMPERATURE SUPERPLASTICITY CONDITIONS

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