Sökning: "mechanical alloying"

Visar resultat 1 - 5 av 75 avhandlingar innehållade orden mechanical alloying.

  1. 1. First-principles study of materials for advanced energy technology

    Detta är en avhandling från Kungliga Tekniska högskolan

    Författare :Xiaojie Li; KTH.; [2018]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Materials Science and Engineering; Teknisk materialvetenskap;

    Sammanfattning : The present thesis addresses promising material solutions for fusion reactors from a theoretical point of view. We focus on two specific systems: W-based alloys used as plasma-facing materials and reduced activation ferritic/martensitic (RAFM) steels used as structural materials of breeding-blanket. LÄS MER

  2. 2. Role of alloying elements in Mo5Si3 intermetallics

    Detta är en avhandling från Kungliga Tekniska högskolan

    Författare :Erik Ström; [2004]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; microhardness; silicide; alloying; ternary; intermetallic; Laves; hardness; high temperature material; Mo5Si3;

    Sammanfattning : The role of alloying elements in the intermetallic compound Mo5Si3 was studied in the alloying systems Mo5-xMxSi3 (M = Cr, Ti, Nb, Ni, or Co, x = 0.5-2). The effects of the alloying elements were examined by characterising the microstructures and identifying the resulting phases. In the case of Cr and Nb alloying, a solubility of 25% (at. LÄS MER

  3. 3. Structure and properties of FeAl as influenced by processing

    Detta är en avhandling från Kungliga Tekniska högskolan

    Författare :HELENA SKOGLUND; [2007]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; EDS; mechanical alloying; FeAl; Al2O3 precipitates; boron-doping; powder processing; diffusion; vacancies; mechanical properties; hardening mechanisms;

    Sammanfattning : Iron aluminides are candidate materials for a sustainable society since they are composed of abundant metals and have excellent corrosion properties in combination with high specific strength. However, there are some drawbacks that limit the practical use, e.g. low RT ductility and a drop in strength at high temperature. LÄS MER

  4. 4. Oxidation and Corrosion of New MCrAlX Coatings Modelling and Experiments

    Detta är en avhandling från Linköping : Linköping University Electronic Press

    Författare :Kang Yuan; Linköpings universitet.; Linköpings universitet.; [2014]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : MCrAlY coatings (“M” for Ni and/or Co) are widely used for the protection of superalloy components operated at high temperatures such as in the hot sections of gas turbines. The exposure to high temperature can cause coating degradation due to oxidation or hot corrosion at the coating surface. LÄS MER

  5. 5. On the Machinability of High Performance Tool Steels

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Natalia Sandberg; Uppsala universitet.; [2012]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; hot work tool steels; alloying composition; machinability; Materialvetenskap; Materials Science;

    Sammanfattning : The continuous development of hot forming tool steels has resulted in steels with improved mechanical properties. A change in alloying composition, primarily a decreased silicon content, makes them tougher and more wear resistant at elevated temperatures. However, it is at the expense of their machinability. LÄS MER