Search for dissertations about: "Twinning"

Showing result 11 - 15 of 42 swedish dissertations containing the word Twinning.

2. 11. Inorganic and Metal-Organic Framework Materials : Synthesis and structure characterization

   Author : Leifeng Liu; Junliang Sun; Xiaodong Zou; Russell Edward Morris; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; X-ray diffraction; transmission electron microscopy; framework materials; porous materials; Inorganic Chemistry; oorganisk kemi;

   Abstract : Inorganic and metal-organic framework materials possessing accessible and permanent pores are receiving tremendous attention. Among them, zeolites are the most famous class due to their wide applications on petrochemistry and gas separation. READ MORE

4. 12. Thermodynamic investigation of systems related to TWIP steels

   Author : Bonnie Lindahl; Malin Selleby; Ales Kroupa; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Teknisk materialvetenskap; Materials Science and Engineering;

   Abstract : The world is facing serious challenges regarding environmental issues. Carbon dioxide levels increase every day. In an attempt to decrease carbon emissions the automotive industry searches for lighter, stronger materials. TWinning Induced Plasticity (TWIP) steels show an impressive combination of strength and ductility. READ MORE

5. 13. A structural study into the boundary surface and associated curvature of three-dimensional mesoporous silica crystals

   Author : Keiichi Miyasaka; Osamu Terasaki; Reinhard Nesper; Stockholms universitet; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; mesoporous crystal; electron crystallography; electrostatic potential map; equi-potential surface; curvature; multiplly-twinned particle; Chemistry; Kemi; Structural Chemistry; strukturkemi;

   Abstract : Since their first discovery in the early 1990s, mesoporous crystals (MCs) have fascinated researchers in various fields because of their interesting structures and their potential uses. Electron crystallography (EC) gives the direct three-dimensional (3D) realization of a crystal as a reconstructed electrostatic potential map (EPM). READ MORE

6. 14. First-principles description of planarfaults in metals and alloys

   Author : Wei Li; Levente Vitos; Ujfalassy Habil Balazs; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Abstract : Phase interface and stacking fault are two common planar defects in metallic materials. In the present thesis, the interfacial energy and the generalized stacking fault energy of random alloys are investigated using density functional theory formulated within the exact muffin-tin orbitals (EMTO) method in combination with the coherent-potential approximation (CPA). READ MORE

7. 15. Experimental Studies of Deformation Structures in Stainless Steels using EBSD

   Author : Karin Yvell; Annika Borgenstam; Peter Hedström; Göran Engberg; Johan Moverare; Högskolan Dalarna; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; 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