Search for dissertations about: "grain boundaries"

Showing result 1 - 5 of 179 swedish dissertations containing the words grain boundaries.

  1. 1. Microstructure of grain boundaries in Ni-16Cr-9Fe model superalloys

    Author : Mattias Thuvander; Chalmers University of Technology; []
    Keywords : precipitates; grain boundaries; atom probe field ion microscopy; nickel alloy; superalloy; TEM; alloy 600;

    Abstract : .... READ MORE

  2. 2. Experimental Studies of Deformation Structures in Stainless Steels using EBSD

    Author : Karin Yvell; Annika Borgenstam; Peter Hedström; Göran Engberg; Johan Moverare; Högskolan Dalarna; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; EBSD; Austenitic stainless steels; Duplex stainless steel; In situ tensile test; Grain boundaries; Grain rotation; Grain size distribution; Texture; Strain hardening; Structure-property relationship; High strain rate; Wire rod rolling; Roll forming; Steel Forming and Surface Engineering; Stålformning och ytteknik;

    Abstract : In this thesis, the focus has been the study of deformation structures in stainless steels by using electron backscatter diffraction (EBSD). Via increased knowledge of the evolution of the substructure during deformation, the design and control of the manufacturing process can be improved. READ MORE

  3. 3. Significance of grain boundaries for transport phenomena in graphene and proton-conducting barium zirconate

    Author : Edit Ahlberg Helgee; Chalmers University of Technology; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; graphene; density functional theory; phonons; proton conduction; grain boundaries; BaZrO3; interatomic model potentials;

    Abstract : Grain boundaries can have a significant influence on the properties of polycrystalline materials. When determining the type and extent of this influence it is frequently useful to employ computational methods such as density functional theory and molecular dynamics, which can provide models of the grain boundary structure at the atomistic level. READ MORE

  4. 4. Atomic-scale modelling of interfaces in cemented carbides: wetting and strength

    Author : Martin Gren; Chalmers University of Technology; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; adhesion; density functional theory; hardmetals; cemented carbides; WC-Co; surfaces; interfaces; grain boundaries; wetting; phase boundaries;

    Abstract : Cemented carbides are composite materials of great technological and industrial importance. They have a unique combination of hardness and toughness and are therefore used widely as tool materials in applications where both high hardness and toughness are demanded. These applications include among others: mining, turning, cutting and milling. READ MORE

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

    Author : Martin Petisme; Chalmers University of Technology; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; analytic bond order potentials; weing; WC-Co; grain boundary sliding; grain boundaries; density functional theory; molecular dynamics; interfaces; cemented carbides;

    Abstract : 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. READ MORE