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Visar resultat 1 - 5 av 71 avhandlingar som matchar ovanstående sökkriterier.

  1. 1. First-principles investigations of ordering in binary alloys

    Författare :Moshiour Rahaman; Andrei Ruban; Staunton Julie; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; ordering; random; alloys;

    Sammanfattning : The aim of the thesis is to study ordering in binary alloys on the basis of first-principles or {\it ab-initio} techniques employing density functional theory (DFT). The ordering phenomena of materials are of crucial importance for technological applications. LÄS MER

  3. 2. Thermodynamic Database for Zirconium Alloys

    Författare :Rosa Jerlerud Pérez; Bo Sundman; Arthur Motta; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Zirconium alloys; thermodynamic equilibrium; thermodynamic properties; binary system; ternary system; Gibbs energy; Thermo-Calc; Calphad; binary system; ternary system; Other materials science; Övrig teknisk materialvetenskap;

    Sammanfattning : For many decades zirconium alloys have been commonly used in the nuclear power industry as fuel cladding material. Besides their good corrosion resistance and acceptable mechanical properties the main reason for using these alloys is the low neutron absorption. LÄS MER

  4. 3. Thermodynamic database for zirconium alloys

    Författare :Rosa Jerlerud Pérez; KTH; []
    Nyckelord :zirconium alloys; thermodynamic equilibrium; thermodynamic properties; binary system; ternary system;

    Sammanfattning : .... LÄS MER

  5. 4. Characteristics of cast magnesium alloys : microstructures, defects and mechanical properties

    Författare :Haiping Cao; Anders Jarfors; Linköpings universitet; []
    Nyckelord :Mg alloys; microstructure; mechanical properties; defects; modelling; segregation bands; hot tear; mould constraint; semi-solid casting.; TECHNOLOGY; TEKNIKVETENSKAP;

    Sammanfattning : Magnesium is the lightest of all structural metals. As such, and combined  with good mechanical and physical properties, it forms the basis for commercial alloys that have found successful use in a wide variety of applications. LÄS MER

  7. 5. Interactions and phase stability in Ni-rich binary alloys

    Författare :Shuang He; Andrei Ruban; Biplab Sanyal; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Ni-based superalloys; ab initio calculations; atomic ordering; effective interactions.; Teknisk materialvetenskap; Materials Science and Engineering; Teknisk materialvetenskap; Materials Science and Engineering;

    Sammanfattning : Ni-based superalloys are the important materials for gas turbines in advancedaeroplane engines . The addition of refractory elements to these superalloys,such as rhenium and tungsten, can significantly improve the hightemperatureperformance by so-called solid-solution hardening. LÄS MER