Sökning: "duplex stainless steels"

Visar resultat 1 - 5 av 21 uppsatser innehållade orden duplex stainless steels.

  1. 1. Machine learning for the prediction of duplex stainless steel mechanical properties : Hardness evolution under low temperature aging

    Kandidat-uppsats, KTH/Materialvetenskap

    Författare :Baptiste Giard; Sofia Karlsson; [2021]
    Nyckelord :Duplex Stainless Steel DSS; Machine Learning; Phase Separation; Me- chanical Properties; Alloying; Duplexa rostfria stål; Maskininlärning; Fasseparation; Mekaniska Egenskaper; Legering;

    Sammanfattning : Duplex stainless steels, DSS are stainless steels that consist of the two phases austenite and ferrite.  The DSS have superb properties and are widely used in industries such as nuclear power and in pressure vessels, pipes and in pipelines.  The use of DSS are limited due to embrittlement which occurs at temperatures from 250 to 550 oC. LÄS MER

  3. 2. Low temperature embrittlement of duplex stainless steels : A study of alloying elements’ effect

    Master-uppsats, KTH/Materialvetenskap

    Författare :Libang Lai; [2020]
    Nyckelord :Duplex stainless steels; low temperature embrittlement; phase separation; alloying element; vanadium addition; mechanical properties; Rostfria duplexstål; sprödhet vid låg temperatur; fasseparering; legeringselement; tillsats av vanadin; mekaniska egenskaper;

    Sammanfattning : Duplex stainless steels (DSSs), consisting of an equal amount of ferrite and austenite phases, have wide applications in e.g. vehicles, chemical engineering as well as nuclear plant  because  of  the  combination  of  excellent  mechanical properties  and  corrosion resistance. LÄS MER

  4. 3. Regulation of Nitrogen Content in High Alloyed Stainless Steels during the AOD Process

    Kandidat-uppsats, KTH/Materialvetenskap

    Författare :Hanna Englund; Henrietta Isaksson; [2019]
    Nyckelord :;

    Sammanfattning : As a final step in the argon oxygen decarburisation (AOD) process, argon- and nitrogen gas is blown through the melt. To regulate the nitrogen content in the steel melt during this step a reliable model is needed. LÄS MER

  5. 4. Evaluation of current welding robot and improvement proposals for future use

    Master-uppsats, KTH/Marina system

    Författare :Joakim Nilsson; [2018]
    Nyckelord :;

    Sammanfattning : Welding of elements, a heat exchanging component, is one of the most essential processes during the manufacturing of Tubel evaporators. Weld joints consists of fillet welds of thin tubes against a plate on one end, and on the other end against a thicker pipe with entry holes for the tubes. LÄS MER

  7. 5. Deformation-Induced Martensitic Transformation and Mechanical Properties of Duplex and Austenitic Stainless Steels : A Synchrotron X-Ray Diffraction Study

    Master-uppsats, KTH/Metallografi

    Författare :Sen Lin; [2017]
    Nyckelord :Synchrotron radiation; High energy X-ray diffraction; In situ tensile loading; TRIP steel; Martensite phase transformation;

    Sammanfattning : Metastable austenitic and duplex stainless steels are widely used materials in industrial anddomestic applications, owing to their attractive characteristics such as good corrosion resistanceand favorable mechanical properties. Both types of steel experience enhanced mechanicalproperties during plastic deformation due to the formation of the martensite phase from theparent austenite phase, this is called deformation-induced martensitic transformation (DIMT). LÄS MER