Sökning: "Spinodal"

Visar resultat 1 - 5 av 43 avhandlingar innehållade ordet Spinodal.

  1. 1. Phase field modeling of Spinodal decomposition in TiAlN

    Detta är en avhandling från Linköping : Linköping University Electronic Press

    Författare :Jennifer Ullbrand; Linköpings universitet.; Linköpings universitet.; [2012]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : TiAlN  thin  films  are  used  commercially  in  the  cutting  tool  industry  as  wear protection  of  the  inserts.  During  cutting,  the  inserts  are  subjected  to  high temperatures (~ 900  ° C and sometimes higher). The  objective of this work is to simulate the material behavior at such high temperatures. LÄS MER

  2. 2. Modelling phase separation in Fe-Cr alloys A continuum approach

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Thomas Barkar; KTH.; [2018]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Phase separation; spinodal decomposition; nucleation; diffusion; thermodynamics; kinetics; steel; ferritic;

    Sammanfattning : The formation of Cr-rich and Fe-rich domains upon ageing of an initially homogeneous Fe-Cr alloy at elevated temperatures (300-600 ºC) is commonly referred to as phase separation. The behaviour originates from a miscibility gap in the Fe-Cr phase diagram. LÄS MER

  3. 3. Thermodynamic and Kinetic Investigation of the Fe-Cr-Ni System Driven by Engineering Applications

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Wei Xiong; KTH.; [2012]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; phase transformation; magnetism; spinodal decomposition; stainless steel; low temperature CALPHAD; phase field; ab initio; atom probe tomography; calorimetry; SRA - E-Science SeRC ; SRA - E-vetenskap SeRC ; SRA - Energy; SRA - Energi;

    Sammanfattning : This work is a thermodynamic and kinetic study of the Fe-Cr-Ni system as the core of stainless steels. The Fe-Cr, Fe-Ni and Cr-Ni systems were studied intensively using both computational and experimental techniques, including CALPHAD (CALculation of PHAse Diagrams), phase field simulation, ab initio modeling, calorimetry, and atom probe tomography. LÄS MER

  4. 4. Effects of Irradiation and Thermal Ageing on the Nanoscale Chemistry of Steel Welds

    Detta är en avhandling från Gothenburg : Chalmers tekniska högskola

    Författare :Kristina Lindgren; [2018]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; spinodal decomposition; thermal ageing; low alloy steel; reactor pressure vessel; irradiation damage; atom probe tomography; core barrel; clustering;

    Sammanfattning : Structural materials of nuclear power plants degrade during operation due to thermal ageing and irradiation from the reactor core. Effects on the materials are an increase in hardness and tensile strength, and a decrease in ductility and fracture toughness, i. e. embrittlement. LÄS MER

  5. 5. Nanostructuring and Age Hardening in TiSiCN, ZrAlN, and TiAlN Thin Films

    Detta är en avhandling från Linköping : Linköping University Electronic Press

    Författare :Lars Johnson; Linköpings universitet.; Linköpings universitet.; [2010]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; thin films; age hardening; spinodal decomposition; TiSiCN; ZrAlN; TiAlN; Transmission electron microscopy; Atom probe tomography; NATURAL SCIENCES; NATURVETENSKAP;

    Sammanfattning : This thesis explores nanostructuring in TiSiCN, ZrAlN, and TiAlN thin films deposited by cathodic arc evaporation onto cemented carbide substrates, with intended applications for cutting tools. The three systems were found to exhibit age hardening upon annealing, by different mechanisms, into the superhard regime (≥30 GPa), as determined by a combination of electron microscopy, X-ray diffraction, atom probe tomography, erda, and nanoindentation tech- niques. LÄS MER