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    STP1597

    Texture Development during Rolling of α + β Dual-Phase ZrNb Alloys

    Published: 2018


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    Abstract

    The texture evolution during high-temperature rolling (800°C) of two model zirconium-niobium alloys was studied using electron backscatter diffraction. The aim was to decouple the relative importance of deformation and phase transformation on the final texture in an effort to elucidate the origin of the strong α-transverse basal texture commonly found in the hot-rolled product. The analysis uses a reconstruction software based on the Burgers relation to reconstruct the high-temperature β orientations, with the indexed α as input. In the low niobium content alloy, the texture evolution of the { 112̅0 } < 101̅0 > component was consistent with deformation in both α and β phases, along with a variant selection mechanism that occurred during the β → α phase transformation. Variant selection was observed to depend on the orientation of the deformed prior β grains. In the high niobium content alloy, a lower α volume fraction during hot rolling gave rise to different β textures and promoted the formation of a Goss component. This contributed to the { 112̅0 } < 101̅0 > component upon cooling, with variant selection enhanced by anisotropic grain breakup.

    Keywords:

    zirconium-niobium alloys, dual phase, hot rolling, texture, phase transformation


    Author Information:

    Daniel, Christopher S.
    University of Manchester, Materials Performance Centre, Manchester,

    Honniball, Peter D.
    Rolls-Royce Plc, Derby,

    Bradley, Luke
    Rolls-Royce Plc, Derby,

    Preuss, Michael
    University of Manchester, Materials Performance Centre, Manchester,

    Quinta da Fonseca, João
    University of Manchester, Materials Performance Centre, Manchester,


    Committee/Subcommittee: B10.02

    DOI: 10.1520/STP159720160070