Sökning: "tungsten carbide"

Visar resultat 26 - 30 av 36 avhandlingar innehållade orden tungsten carbide.

  1. 26. High Resolution Microanalysis of Creep Resistant 9-12% Chromium Steels

    Författare :Lars Lundin; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; martensitic stainless steel; TEM; modified 12% chromium steel; creep resistant; atom-probe field-ion microscopy;

    Sammanfattning : This thesis deals with detailed studies of the microstructure of 9-12% chromium steels. Three alloys with improved creep resistance have been studied in different stages of heat treatment and after creep testing. Two of them were manufactured using PM/HIP and were of the type 10. LÄS MER

  3. 27. Multielement Urban Geochemistry : Exporing the Expected, the Unexpected and the Unknown

    Författare :Pasi Peltola; Mats Åström; Högskolan i Kalmar; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Environmental chemistry; Miljökemi; Environmental Chemistry; Miljökemi; Environmental Chemistry; Miljökemi;

    Sammanfattning : Urban areas are hot-spots for the human use of most elements. These elements are the building blocks of our various goods and chemicals and are used both purposely and in a more unaware fashion. There are many ways in which the elements get dispersed from the human use. Commonly acknowledged and evident processes of dispersion are point sources (e. LÄS MER

  4. 28. ICME guided study of mass transport in production and application of cemented carbides

    Författare :Armin Salmasi; Henrik Larsson; Lars Höglund; Andreas Blomqvist; Joakim Odqvist; John Ågren; José Garcia; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; cemented carbides; non-homogeneous structures; liquid phase migration; ICME; CALPHAD; materials design; viscosity; diffusion; mass transport; thermodynamics; kinetics; ab-initio; Materials Science and Engineering; Teknisk materialvetenskap;

    Sammanfattning : Cemented carbides are metallic composites consisting of a WC hard phase and a ductile binder, usually Co-based, produced by powder metallurgy and sintering. Cemented carbides are an essential part of modern material and manufacturing processes. LÄS MER

  5. 29. Mechanical Modelling of Powder Compaction : Due to Corona is not possible to attend this defense in person, instead attend via this link: https://play.kth.se/media/t/0_mbkr2jhi​

    Författare :Hjalmar Staf; Per-Lennart Larsson; Göran Frenning; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Hållfasthetslära; Solid Mechanics;

    Sammanfattning : Cutting tool inserts, for instance used in steel machining, have the requirement to be toughand are therefore most often manufactured out of cemented carbides, using powdermetallurgy. Manufacturing components with powder metallurgy has its advantages in highproductivity and good net shape. LÄS MER

  7. 30. Defects in Austenitic Steels and Hard Metals - A DFT-based Study

    Författare :Ruiwen Xie; Levente Vitos; Ilja Turek; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; defects; austenitic steels; cemented carbides; ab-initio; Teknisk materialvetenskap; Materials Science and Engineering;

    Sammanfattning : Materials are never 100% pure due to the limitation of purification method or manufacturing process. Nor are they perfect, especially under deformation. The present work aims to explore different roles played by the defects in austenitic steels and hard metals. LÄS MER