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Browsing by Subject "superplasticity"

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  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Modeling of near-net forging of thin-walled parts of strain rate sensitive alloy
    (2005) Bednarek, Sylwia; Sińczak, Jan; Skubisz, Piotr
    Numerical modelling of a single-operation forging process of a radial bladed impeller forging as one piece is presented. The analysis have been performed using high-melting-alloy model material. A several alternative technologies differing in temperature and forming speed. Evaluation of the correctness of a forging process were based on distribution of effective strain, effective strain rate, mean stress as well as fllling of the cavities of a die-impression in thin-walled ribs type areas.
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Numerical modelling of extrusion process in superplastic flow range
    (2006) Grzesiak, Jan; Sińczak, Jan; Skubisz, Piotr
    The results of numerical modeling of direct and indirect extrusion process of a model alloy of high strain-rate sensitivity at room temperature, Sn38Pb, are presented. The studies were carried out for three values of die angle, three temperatures, four ram speed values, two values of extrusion coefficient and two values of friction factor. Effect of extrusion process parameters on distribution of effective strain, effective strain rate in extruded bar and extrusion load was estimated.