Sökning: "grain boundary"

Visar resultat 1 - 5 av 159 avhandlingar innehållade orden grain boundary.

  1. 1. Grain Boundary Ridge Formation during High Temperature Oxiditation of Manganese Containing Steels

    Författare :Casper Thorning; Seshadri Seetharaman; Tooru Matsumiya; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; grain boundary ridges; TRIP-steel; IF-steel; recrystalization; hight temperature oxidation; selective oxidation grain boundary diffusion; grain boundary segregation; Mn; Metallurgical process engineering; Metallurgisk processteknik;

    Sammanfattning : .... LÄS MER

  3. 2. An Antiferroelectric Twist Grain Boundary Phase

    Författare :Johann Georg Meier; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; antiferroelectric liquid crystals; liquid crystals; twist grain boundary phase;

    Sammanfattning : .... LÄS MER

  4. 3. Hot Cracking and Grain Boundary Weaknesses of Nickel - Based Superalloys

    Författare :Joel Håkan Andersson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Hot cracks; Notch rupture testing; Eutectic; Weldability; Varestraint testing; Grain boundary weaknesses; Superalloys;

    Sammanfattning : Abstract Grain boundary weaknesses of nickel-based superalloys not only materialize during service in the hot turbine engine sections but also during the weld manufacturing. The performance, in this respect, of the most commonly used alloys at Volvo Aero Corporation (VAC), 718 and the higher temperature capacity Waspaloy, are therefore the main subjects for this thesis. LÄS MER

  5. 4. Atomistic modeling of interfaces in WC-Co cemented carbides

    Författare :Martin Petisme; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; analytic bond order potentials; weing; WC-Co; grain boundary sliding; grain boundaries; density functional theory; molecular dynamics; interfaces; cemented carbides;

    Sammanfattning : Grain and phase boundaries are crucial in understanding the properties of real materials. In this thesis, interfaces in WC–Co cemented carbide are modeled atomistically using density functional theory (DFT) and analytic interatomic potentials. LÄS MER

  7. 5. Dynamics of high-angle grain boundary YBCO Josephson junctions

    Författare :Tobias Lindström; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : This thesis describes experimental investigations of properties of high-angle YBa2Cu3O7−δ(YBCO)bicrystal Josephson junctions and SQUIDs fabricated on SrTiO3-substrates. The main focus of theinvestigation has been on the effects of the predominant d-wave symmetry of the superconductingwavefunction in YBCO on transport properties and dynamics. LÄS MER