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Thermo-Mechanical Analysis and Lifing of Ni-Cr SPF Tool

  • MS19 High temperature sheet forming: S.B. Leen
  • Published:
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Abstract

The paper describes the aniso-thermo-mechanical analysis of a representative large industrial SPF (XN40F, high nickel-chromium) tool. Sequentially coupled thermo-mechanical analyses under realistic loading conditions are developed within a general purpose non-linear FE code, ABAQUS to predict and analyse the complex temperature-stress-strain cycles of the SPF tool. A temperature-dependent, two-layer visco-plasticity model which combines both creep and combined isotropic-kinematic plasticity is chosen to represent the material behaviour. The material constants are identified from multiple strain-range isothermal cyclic tests and stress relaxation tests, over a range of temperatures between 20°C and 900°C. The FE predicted stress-strain data is used in stress-strain-life equations obtained from isothermal fatigue lifing tests at 900°C and the identified constants are validated against the TMF tests and simulative SPF tool test, designed to represent the temperature and stress-strain cycling associated with the most damaging phase of the tool cycle. The predicted SPF tool life is consistent with the simulative SPF tool test life and industrial observations.

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Authors and Affiliations

  1. Department of Mechanical, Materials & Manufacturing Engineering, Faculty of Engineering, University of Nottingham, Nottingham, NG7 2RD, UK

    Aditya A Deshpande, Wei Sun & Thomas H. Hyde

  2. Department of Mechanical and Biomedical Engineering, College of Engineering and Informatics, National University of Ireland, Galway, Ireland

    Sean B Leen

  3. University Park, Nottingham, NG7 2RD, UK

    Aditya A Deshpande

Authors
  1. Aditya A Deshpande
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  2. Sean B Leen
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  3. Wei Sun
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  4. Thomas H. Hyde
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Correspondence to Aditya A Deshpande.

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Deshpande, A.A., Leen, S.B., Sun, W. et al. Thermo-Mechanical Analysis and Lifing of Ni-Cr SPF Tool. Int J Mater Form 3 (Suppl 1), 1151–1154 (2010). https://doi.org/10.1007/s12289-010-0976-9

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  • DOI: https://doi.org/10.1007/s12289-010-0976-9

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