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Influence of niobium solutes on the mechanical behavior of nickel during hot working

Abstract : An experimental program was performed to determine the rheology and influence of niobium additions to high-purity nickel on dynamic-recrystallization behavior during hot working. Various high-purity alloys were prepared (pure Ni and Ni-0.01, 0.1, 1, 2, 5 and 10 wt% Nb) and deformed to high strains by hot torsion to characterize the mechanical behavior within the temperature range from 800 to 1000 degrees C at (von Mises equivalent) strain rates of 0.03, 0.1 and 03 s(-1). A simple analytical method was proposed for predicting the strain-hardening and dynamic-recovery parameters in the classical Yoshie-Laasraoui-Jonas equation. By the means, the effect of niobium solutes on plastic flow was determined, thus enabling a reasonable fit for the flow curves for the entire range of solid solution Ni-Nb alloys. (C) 2013 Elsevier B.V. All rights reserved.
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Nedjoua Matougui, David Piot, M. L. Fares, Frank Montheillet, S.L Semiatin. Influence of niobium solutes on the mechanical behavior of nickel during hot working. Materials Science and Engineering: A, Elsevier, 2013, 586, pp.350-357. ⟨10.1016/j.msea.2013.07.079⟩. ⟨emse-01011680⟩



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