Sökning: "WC grain growth."

Visar resultat 1 - 5 av 13 avhandlingar innehållade orden WC grain growth..

  1. 1. WC grain growth during sintering of cemented carbides : Experiments and simulations

    Författare :Karin Mannesson; John Ågren; Annika Borgenstam; Håkan Engqvist; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Cemented carbide; Grain growth; Abnormal grain growth; Image analysis; Modeling; 3-D grain size distribution; Inverse Saltykov; Materials science; Teknisk materialvetenskap;

    Sammanfattning : Cemented carbides are composite materials consisting of a hard carbide and a ductile binder. They are powdermetallurgically manufactured, where liquid-phase sintering is one of the main steps. The most common cemented carbide consists of WC and Co and it is widely used for cutting tools. LÄS MER

  3. 2. Microstructure Development of WC-Co Based Cemented Carbides During Creep Testing

    Författare :Mohamed Amine Yousfi; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; plastic deformation; TEM; APT; EBSD; WC grain growth.; Cr segregation;

    Sammanfattning : The aim of this work is to understand the mechanisms behind the plastic deformation of WC‐Co based cemented carbides. The microstructure of two series with different WC grain size was investigated before and after creep deformation using quantitative microscopy, atom probe tomography, and transmission electron microscopy. LÄS MER

  4. 3. Effect of metal and cubic carbide additions on interface chemistry, phase composition and grain growth in WC-Co based cemented carbides

    Författare :Jonathan Weidow; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; APT; TEM; EBSD; SEM; EDX;

    Sammanfattning : A cemented carbide is a composite material used in metal cutting operations. A hardness providing WC-based skeleton is embedded in a toughness providing binder, mainly consisting of Co. The material is produced by powder metallurgical methods. LÄS MER

  5. 4. A computational study of interface structures and energetics in cemented carbides and steels

    Författare :Sven Johansson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; WC-Co; cemented carbides; interfaces; density functional theory; microstructure; sintering; steels;

    Sammanfattning : Cemented carbides are hard composite materials of great industrial importance. Because of their combination of hardness and toughness, they are used e.~g. for cutting, drilling, turning and milling. LÄS MER

  7. 5. Evolution of WC-Co cemented carbide microstructure during creep testing

    Författare :Mohamed Amine Yousfi; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; plastic deformation; cemented carbides; linear intercept; transmission electron microscopy.; electron backscattered diffraction; Atom probe tomography;

    Sammanfattning : The aim of this work is to understand the mechanisms behind the plastic deformation of WC-­Co based cemented carbides. The microstructures of two materials have been investigated before and after creep deformation using quantitative microscopy, atom probe tomography, and transmission electron microscopy. LÄS MER