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    Volume 4, Issue 3 (November 2015)

    Special Issue Paper

    Analysis of Microstructure in Hot Torsion Simulation

    (Received 6 April 2015; accepted 17 June 2015)

    Published Online: 24 July 2015

    CODEN: MPCACD

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    Abstract

    Hot torsion is frequently employed to simulate multipass thermomechanical rolling. While flow behavior, observed through shear stress versus shear strain, is typically used to characterize hot deformation and softening behaviors, the resulting microstructures can also provide significant insight into microstructural evolution and strain accumulation during the hot deformation process. A preferred approach for the analysis of microstructural features resulting from hot torsion is presented. Torsional strain paths are reviewed and compared with traditional hot rolling deformations. A tangential sectioning technique, combined with supporting fundamentals, is also presented. Microstructural observation of steels thermomechanically deformed in hot torsion verified the ability to reasonably quantify strain from microstructural analysis. This approach offers a new method for assessing shear strain accumulation within local regions of a body plastically deformed in torsion, and should provide a useful complement to the assessment of mechanical responses in hot deformation studies.

    Author Information:

    Whitley, B. M.
    Department of Metallurgical and Materials Engineering, Colorado School of Mines, Golden, CO

    Araujo, A. L.
    Department of Metallurgical and Materials Engineering, Colorado School of Mines, Golden, CO

    Speer, J. G.
    Department of Metallurgical and Materials Engineering, Colorado School of Mines, Golden, CO

    Findley, K. O.
    Department of Metallurgical and Materials Engineering, Colorado School of Mines, Golden, CO

    Matlock, D. K.
    Department of Metallurgical and Materials Engineering, Colorado School of Mines, Golden, CO


    Stock #: MPC20150012

    ISSN:2165-3992

    DOI: 10.1520/MPC20150012

    Author
    Title Analysis of Microstructure in Hot Torsion Simulation
    Symposium ,
    Committee A01