Sökning: "phase transformation"

Visar resultat 1 - 5 av 348 avhandlingar innehållade orden phase transformation.

  1. 1. Phase transformation and stability studies of the Zr-H system

    Författare :Tuerdi Maimaitiyili; Lars Hallstadius; Malmö högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Zirconium hydride; synchrotron X-ray diffraction; Nuclear materials; phase transformation; in-situ hydrogen charging; hydrogen related degradation; neutron diffraction; powder diffraction; Rietveld analysis; γ-ZrH; hydrogen embrittlement; zirconium hydride; γ-ZrH; synchrotron X-ray diffraction; neutron diffraction; hydrogen charging; in situ phase transformation; hydrogen embrittlement; hydrogen induced degradation;

    Sammanfattning : Zirconium alloys are widely used in the nuclear industry because of their high strength, good corrosion resistance and low neutron absorption cross-section. Zirconium has a strong affinity for hydrogen, however, and if hydrogen concentration builds up, the material will gradually degrade. LÄS MER

  3. 2. Finite element simulation of transformation plasticity in martensitic transformation

    Författare :Kjell Simonsson; Sören Sjöström; Linköpings universitet; []
    Nyckelord :Phase transformations. transformation plasticity; micromechanical models; martensitic transformation; finite element simulations. thermodynamics; moving interface; mechanical dissipation; TECHNOLOGY; TEKNIKVETENSKAP;

    Sammanfattning : This study is concerned with the simulation of transformation plasticity in martensitic transformation. In the first paper the concept of a transformation plasticity strain is introduced from a phenomenological point of view. LÄS MER

  4. 3. Transformation phenomena in a super duplex stainless steel

    Författare :Anders Wilson; KTH; []
    Nyckelord :Duplex stainless steel; Microstructure; Phase transformations; Precipitates; Sigma phase; Kinetics; Thermodynamic calculation; Continuous cooling transformation diagram; Time temperature transformation diagram; Computer model.;

    Sammanfattning : Duplex stainless steels consist of about equal fractions offerrite and austenite and are attractive due to their highcorrosion resistance against pitting corrosion and stresscorrosion cracking. The pitting corrosion resistance can bedescribed by the PREN value which is defined asPREN=%Cr+3.3*%Mo+16*%N. LÄS MER

  5. 4. In-situ phase studies of the Zr-H system

    Författare :Tuerdi Maimaitiyili; Malmö högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Zirconium hydride; synchrotron X-ray diffraction; neutron diffraction; phase transformation; in-situ hydrogen charging; hydrogen related degradation; in situ phase transformation; hydrogen embrittlement; hydrogen charging; zirconium hydride; γ-ZrH; synchrotron X-ray diffraction; neutron diffraction; hydrogen induced degradation;

    Sammanfattning : Zirconium alloys are widely used in the nuclear industry because of their high strength, good corrosion resistance and low neutron absorption cross-section. However, zirconium has strong affinity for hydrogen, which may lead to hydrogen concentration build-up over time during a corrosion reaction when exposed to water. LÄS MER

  7. 5. Skogsbolagen och bygden : ekonomisk, social och politisk omvandling i Örnsköldsviksområdet 1860-1900

    Författare :Ove Lundberg; Umeå universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Industrialization; economic transformation; social transformation; political transformation; 19th century; sawmill industry; employment; lumbering; northern Sweden.; Skogsindustri -- historia; Sverige -- Ångermanland -- Örnsköldsvik;

    Sammanfattning : In this dissertation industrialization and its economic, social and political consequences in the district of Örnsköldsvik 1860—1900 are studied.Firstly, the dissertation elucidates the causes of the industrialization of the district, viz. LÄS MER