Reversed straining in axisymmetric compression test

Mogens Arentoft, Tarras Wanheim, Maria Lindegren, Søren Lassen

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    A large group of the cold forging processes is carried out in a thick – walled container with the deformation force transmitted through a punch moving axially in the container. The work piece, being entrapped between punch and container will expand and exert a radial pressure resulting in an expansion of the bore. After unloading, the container will try to reduce this expansion and thus in many cases cause a reversed plastic deformation of the work-piece. This will have an effect on the resulting diameter of the work-piece and – above all – on the resulting mechanical properties. In order to simulate these conditions a reversed axisymmetrical material tester is designed and constructed. Three different materials were tested, aluminum alloy AA6082, technically pure copper (99.5%) and cold forging steel Ma8, at different temperatures found during cold forging.
    Original languageEnglish
    JournalJournal of Materials Processing Technology
    Volume159
    Issue number1
    Pages (from-to)62-68
    ISSN0924-0136
    Publication statusPublished - 2005

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