Search for dissertations about: "Joakim Odqvist"

Showing result 1 - 5 of 10 swedish dissertations containing the words Joakim Odqvist.

  1. 1. Deviation From Local Equilibrium During the Austenite to Ferrite Transformation in Steel-A Modelling Approach

    Author : Joakim Odqvist; KTH; []
    Keywords : Interface; Solute drag; Paraequilibrium; Simulation; Local Equilibrium;

    Abstract : This thesis highlights the role of phase interfaces on phasetransformations in metallic materials. The deviation from localequilibrium at the moving phase interface has been analysed interms of solute drag theory and finite interface mobility. Inparticular the planar growth of proeutectoid ferrite fromaustenite in steel has been studied. READ MORE

  2. 2. Aspects of Structural Evolution in Cemented Carbide – Carbide Size, Shape and Stability

    Author : Ida Borgh; Joakim Odqvist; Peter Hedström; Annika Borgenstam; Jean-Michel Missiaen; KTH; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Cemented carbide; Ti; Zr C; Coarsening; Phase separation; C-activity; initial WC powder size; electron backscattered diffraction; microscopy; X-ray diffraction;

    Abstract : Cemented carbide is a composite material used in applications like cutting tools and rock drilling inserts. The material commonly consists of WC grains embedded in a Co-rich binder phase and the material properties strongly depend on the WC grain size. READ MORE

  3. 3. An experimental and theoretical study of precipitation during tempering of martensite in Fe-C-Cr alloys

    Author : Ziyong Hou; Joakim Odqvist; Jörgen Andersson; KTH; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : .... READ MORE

  4. 4. Study of precipitation in martensitic Fe-C-Cr alloys during tempering : Experiments and modelling

    Author : Ziyong Hou; Joakim Odqvist; Andersson Jörgen; KTH; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Fe-C-Cr alloy; Microstructure; Precipitates; Tempering of martensite; Electron microscopy; Modelling.; Materials Science and Engineering; Teknisk materialvetenskap;

    Abstract : Understanding the precipitation reaction is very important since precipitation hardening is one of the most effective strengthening mechanisms in metallic alloys. In martensitic steels, a tempering heat treatment is often performed. READ MORE

  5. 5. Powder-metallurgical processing and phase separation in ternary transition metal carbides

    Author : Taoran Ma; Joakim Odqvist; Peter Hedström; Hans-Olof Andren; KTH; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Materials Science and Engineering; Teknisk materialvetenskap;

    Abstract : Ternary transition metal cubic carbides have high hardness and are potential carbides in cemented carbide and cermet tools, as well as hard coatings used to improve metal cutting performance. In the present work, (Ti,Zr)C, (V,Nb)C, and (V,Ta)C ternary cubic carbides were synthesized using traditional powder-metallurgical methods. READ MORE