Search Constraints

Start Over
Filtering by: Creator Brier, Julie A. Remove constraint Creator: Brier, Julie A. Advisor Tucker, Julie Remove constraint Advisor: Tucker, Julie

Search Results

  • Role of Stoichiometry on Ordering in Ni-Cr Alloys

    Creator:
    Teng, Fei
    Abstract:
    Mechanical property degradation due to isothermal ageing is of potential concern for alloys based on the Ni-Cr binary system (e.g., Inconel 690, 625), particularly in nuclear power applications where component lifetimes can exceed 40 years. In the present research, the disorder-order phase transformation, which is the primary mechanism of ageing,...
    Resource Type:
    Masters Thesis
    Full Text:
    : Role of Stoichiometry on Ordering in Ni-Cr Alloys Abstract approved: Julie D. Tucker

  • Investigation of Thermal Degradation in Structural Alloys for Nuclear Power Systems

    Creator:
    Teng, Fei
    Abstract:
    The thermal degradation of structural materials is considered to be a key factor for evaluating the lifetime of current nuclear power plants. Ni-based and Fe-based alloys, such as 690, 625, 304, and 316, are widely used in nuclear industry as structural components due to the extraordinary corrosion resistance and mechanical...
    Resource Type:
    Dissertation
    Full Text:
    sincere appreciation to my Ph.D. advisor Dr. Julie Tucker for guiding me from a fresh graduate student

  • Heat treatment effects on CPM-M4 tool steel performance as edged blade material

    Creator:
    Lian, Sidi
    Abstract:
    CPM-M4 tool steel is a commonly used knife blade material due to its high strength and wear resistance. The goal of this thesis is to understand how heat treatment parameters affect blade performance and microstructure.Five heat treatments were applied to CPM-M4 steel by varying austenitizing and tempering temperatures. The microstructures...
    Resource Type:
    Masters Thesis

  • Microstructural Characterization of Porosity in U-Mo Low Enriched Uranium Plate Fuel

    Creator:
    Westman, Bjorn E.
    Abstract:
    New low enriched uranium (LEU) fuels are being developed for replacement of high enriched uranium (HEU) fuels in high power research reactors. U-Mo LEU plate fuels have been identified as a candidate for replacement of current HEU fuels. However, U-Mo fuels tend to exhibit accelerated swelling typically at fission densities...
    Resource Type:
    Masters Thesis
    Full Text:
    Abstract approved: ______________________________________________________ Julie D

  • Corrosion of Carbon and Stainless Steels in H₂O-sCO₂ Environments for Power Cycle Applications

    Creator:
    Teeter, Lucas
    Abstract:
    The corrosion behaviors of carbon and stainless steels were investigated in supercritical CO₂ (sCO₂ ) containing H₂O and O₂ simulating conditions that exist in direct sCO₂ power cycle heat exchangers. Thermodynamic properties of CO₂-H₂O-O₂ systems related to the corrosion phenomena were determined using NIST software. The exposure tests of the...
    Resource Type:
    Masters Thesis
    Full Text:
    Stainless Steels in H2O-sCO2 Environments for Power Cycle Applications Abstract approved: Julie Tucker

  • Corrosion Resistance of Alloys in Seawater and Supercritical Carbon Dioxide Environments

    Creator:
    Repukaiti, Reyixiati
    Abstract:
    The corrosion resistances of several alloys were investigated to optimize performance and cost in seawater and supercritical CO2 environments. Many alloys are prone to corrosion in seawater and/or supercritical CO2 containing impurity environments. Exposure and electrochemical experiments were conducted in both environments to evaluate alloys’ corrosion resistance. In seawater corrosion...
    Resource Type:
    Masters Thesis
    Full Text:
    approved: ______________________________________________________ Julie Tucker The corrosion

  • Corrosion Resistance of Alloys in Direct-Fired Supercritical CO₂ Power Cycle Aqueous Environments

    Creator:
    Repukaiti, Reyixiati
    Abstract:
    Using supercritical CO₂ (sCO₂) as a working fluid has increasingly gained attention in the energy industry. sCO₂ power cycles has various advantages, such as high cycle efficiency, compact turbomachinery, and potential zero CO₂ emission. Along with these benefits, materials degradation issues have also been emphasized in the last decade. Aqueous...
    Resource Type:
    Dissertation
    Full Text:
    ACKNOWLEDGEMENTS First and foremost, I’d like to sincerely thank my advisor, Dr. Julie Tucker, for taking a

  • Evaluation of Stress Corrosion Cracking of 316L Stainless Steel in FLiNaK Using the Slow Strain Rate Technique

    Creator:
    Quintana, Xavier A.
    Abstract:
    Molten salts have been targeted as a promising coolant for next generation reactors due to their high boiling point, heat capacity, and thermal conductivity. Despite these benefits, molten salt systems present unique materials compatibility issues, highlighted by the aggressive corrosion attack and dealloying typically seen on materials in these environments....
    Resource Type:
    Masters Thesis
    Full Text:
    Technique Abstract approved: Samuel A. Briggs Julie Tucker Molten salts have been targeted as a promising

  • Characterization of Oxide Growth of Aluminum Alloy 6061 for Nuclear Research and Test Reactors

    Creator:
    Wei, Youran
    Abstract:
    Oxide growth is a common phenomenon on aluminum alloy cladding surfaces in nuclear research and test reactors. Without better understanding of oxide growth, excessive oxide build up on the cladding surface reduces heat transfer capability from fuel to coolant and causes safety concerns due to the potential cladding rupture or...
    Resource Type:
    Masters Thesis
    Full Text:
    :____________________________________________________ Julie D. Tucker Wade R. Marcum Oxide growth is a common phenomenon on aluminum alloy