STP1423: Plastic Deformation and Fracture During the Zr1%Nb Tube Production

    Zavodtchikov, SY
    Candidate of physical and mathematical science, senior research engineer, Chepetskiy Mechanical Plant, Glazov,

    Zuev, LB
    Professor, Institute of Physics of Material Strength, Russian Science Academy Siberian's Branch, Tomsk,

    Belov, VI
    Group manager, Chepetskiy Mechanical Plant, Glazov,

    Lositskiy, AF
    Technical director, Chepetskiy Mechanical Plant, Glazov,

    Shevnin, YP
    Senior research engineer, Chepetskiy Mechanical Plant, Glazov,

    Pages: 22    Published: Jan 2002


    Abstract

    The deformation of ZrNb alloy tubes involves plastic flow localization in the metal, which is one of the most complex in the theory of material plasticity. The plastic deformation is accompanied by initiation of auto-waves in the body of material. The auto-wave model of plastic deformation was used as a very informative source for getting information to optimize the cold deformation process of zirconium alloy material, in particular for Zr1%Nb alloy cladding tubes. The results of local X-ray measurements of residual stresses were compared with the results of ultrasonic speed measurements in the same tubing material. The correlation between ultrasonic speed and residual stresses has been found and investigations conducted have allowed the improvement of the process of zirconium alloy tube manufacturing. The results obtained were used in developing the optimal processes of cold deformation of tubes made from Zr1%Nb alloy. Those processes provided, together with optimal heat treatment regimes, high cladding tube performances in comparison with those obtained with other well-known manufacturing processes.

    Keywords:

    zirconium alloy, Zr1%Nb, cladding tubes, plastic deformation, residual stress, auto-wave


    Paper ID: STP11400S

    Committee/Subcommittee: B10.02

    DOI: 10.1520/STP11400S


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