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    Representing the Superplasticity of Inconel 718

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    Authors
    Zhang, B.
    Mynors, Diane J.
    Mugarra, A.
    Ostolaza, K.
    Issue Date
    2004
    
    Metadata
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    Abstract
    Modelling the superplastic process using finite element analysis can enable optimum process parameters to be determined and lead to a better understanding of the process. Constitutive equations, which accurately represent a material’s behaviour, are very important in the development of representative process models. The development of a set of constitutive equations for superplastic grade Inconel 718 alloy based around a hyperbolic sine relation is described in this paper. The hyperbolic sine relation with strain dependant parameters is shown to represent the relationship between stress, strain and strain rate over a wide strain range. The valid strain range is sufficient to cover both strain hardening and flow softening behaviour.
    Citation
    Journal of Materials Processing Technology, 153-154: 694-698
    Publisher
    Amsterdam: Elsevier
    Journal
    Journal of Materials Processing Technology
    URI
    http://hdl.handle.net/2436/29643
    DOI
    10.1016/j.jmatprotec.2004.04.138
    Type
    Journal article
    Language
    en
    Description
    This paper, with another by the authors in Materials Science Forum, 2004 (Vol 447/448, pp 171-176), describes the first constitutive equation for superplastic forming grade INCONEL 718. The equation is essential for the simulation of the superplastic forming of INCONEL 718 aerospace components and is now being utilised, with 98% accuracy, by: Industria de Turbo Propulsores, S.A. ITP Industria de Turbo Propulsores, S.A. Edificio nº 300 – Parque Tecnológico 48170 ZAMUDIO (Bizkaia - SPAIN) Pablo Arriola Garcia pablo.arriola@itp.es Tel: +34 94 489 21 00
    ISSN
    09240136
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.jmatprotec.2004.04.138
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    Faculty of Science and Engineering

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