Volume 2, Issue 6 (June 2005)

    Residual Stress Measurements in Welded and Plastically Deformed Target Structural Materials

    (Received 25 March 2004; accepted 2 March 2005)

    Published Online: 2005

    CODEN: JAIOAD

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    Abstract

    Transmutation of spent nuclear fuels (SNF) is currently being considered to transform long-lived isotopes to species with relatively short half-lives and reduced radioactivity through capture and decay of minor actinides and fission products. This process is intended for geologic disposal of SNF for shorter durations in the proposed repository at the Yucca Mountain site. The structural material (Type 304L stainless steel/Alloy EP-823) surrounding the transmutation target will be subjected to welding operation and plastic deformation during fabrication, which could induce residual stresses in it. Destructive ring-core, and nondestructive x-ray diffraction, neutron diffraction, and positron annihilation spectroscopic techniques were used to evaluate residual stresses in welded and cold-worked specimens of both materials. The results indicate that, in general, for a welded specimen consisting of Alloy EP-823 and Type 304L stainless steel on opposite sides, compressive and tensile residual stresses were observed in the former and latter materials, respectively. However, a welded specimen consisting of only Alloy EP-823 on both sides showed tensile residual stresses. The extent of residual stresses in cold-worked specimens was enhanced with increased level of cold-reduction. In case of a bent specimen, compressive and tensile residual stresses were noticed in the convex and concave sides, respectively.


    Author Information:

    Roy, AK
    Associate Professor, University of Nevada, Las Vegas, Las Vegas, NV

    Venkatesh, A
    Graduate Student, University of Nevada, Las Vegas, Las Vegas, NV

    Dronavalli, S
    Graduate Student, University of Nevada, Las Vegas, Las Vegas, NV

    Marthandam, V
    Graduate Student, University of Nevada, Las Vegas, Las Vegas, NV

    Wells, D
    Associate Professor, Idaho State University, Pocatello, ID

    Selim, F
    Post Doctoral Researcher, Idaho State University, Pocatello, ID

    Rogge, R
    Senior Research Officer, National Research Council, Neutron Program for Materials Research, Chalk River, Ontario


    Stock #: JAI12564

    ISSN: 1546-962X

    DOI: 10.1520/JAI12564

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    Author
    Title Residual Stress Measurements in Welded and Plastically Deformed Target Structural Materials
    Symposium Residual Stress Effects on Fatigue and Fracture Testing and Incorporation of Results into Design, 2004-05-21
    Committee E08