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Sökning: WFRF:(Zuelli N.)

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1.
  • Elrakayby, H., et al. (författare)
  • A study on modelling the superplastic behaviour of Ti54M alloy
  • 2020
  • Ingår i: Solid State Phenomena. - : Scientific.net. - 1012-0394 .- 1662-9779. ; 306, s. 9-14
  • Tidskriftsartikel (refereegranskat)abstract
    • Superplastic forming is a cost-effective process for manufacturing complex-shaped titanium parts. TIMETAL ® 54M (Ti54M) is a titanium alloy that has been commercially available since 2003, however studies on modelling its superplastic behaviour are scarce in the literature. Finite element modelling can be used to enable the manufacturing of complex-shaped parts economically as the number of experimental trials can be reduced. This paper illustrates the implementation of a microstructural-based model to predict the superplastic behaviour of Ti54M alloy during forming at elevated temperature. The parameters of the material model are derived in this work for the Ti54M alloy. A Matlab script has been developed for the calculation and calibration of the material model parameters based on material experimental data. The material model was implemented into the finite element commercial software Abaqus by means of a user-defined subroutine. The finite element calculations take into account also grain size evolution. Finally, a pressure profile was numerically calculated for forming a non-commercial part via superplastic forming targeting optimal conditions for the material.
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2.
  • Gomez-Gallegos, A. A., 1983-, et al. (författare)
  • A comparative study assessing the wear behaviour of different ceramic die materials during superplastic forming
  • 2017
  • Ingår i: Materialwissenschaft und Werkstofftechnik. - : Wiley-VCH Verlagsgesellschaft. - 0933-5137 .- 1521-4052. ; 48:10, s. 983-992
  • Tidskriftsartikel (refereegranskat)abstract
    • Superplastic forming is an advanced manufacturing process where metallic sheets are heated to their superplastic region to be then blow formed within a die set. The process allows for the forming of complex parts but it is typically restricted to low volume production and high value pieces. Despite their brittle nature, ceramic dies are a developing technology for superplastic forming as they offer lower production costs and shorter lead times than conventional metallic dies, thus reducing process costs. This work presents a method to assess ceramic die wear by means of a novel test rig developed a at the Advance Forming Research Centre of the University of Strathclyde, Scotland, UK where the superplastic forming die-part interaction can be replicated at laboratory scale. Controllable normal load tests at standard superplastic forming conditions on three different reinforced ceramic materials are carried out with a view to understanding their wear mechanisms and to ultimately identify methods to improve their wear resistance.
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  • Resultat 1-2 av 2
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refereegranskat (2)
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Zuelli, N. (2)
González, D (1)
Mandal, P. (1)
Farrell, M (1)
Gomez-Gallegos, A. A ... (1)
Elrakayby, H. (1)
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Staiano, A. (1)
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