Search for dissertations about: "High entropy alloys"

Showing result 16 - 20 of 38 swedish dissertations containing the words High entropy alloys.

  2. 16. Ab initio atomistic simulation of metals and multicomponent alloys

    Author : Fuyang Tian; Levente Vitos; Kalevi Kokko; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; high entropy alloys; ab inito;

    Abstract : Ab initio theory provides a powerful tool to understand and predict the behavior of materials. This thesis contains both of these aspects. First we use ab initio alloy theory to investigate a new kind of complex alloy (high-entropy alloy). READ MORE

  4. 17. Creep modeling and first-principles investigation of high-temperature alloys

    Author : Jing Zhang; Pavel A. Korzhavyi; Rolf Sandström; Gunther Eggeler; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Austenitic stainless steels; Nickel-based superalloys; Fundamental creep models; EMTO-CPA method; Quasi-harmonic Debye model; Thermo-mechanical properties; High temperatures.; Teknisk materialvetenskap; Materials Science and Engineering;

    Abstract : Stainless steels and nickel-based superalloys are materials that have been widely used to manufacture components servicing at high temperatures. Creep strength is one of the most important properties in such conditions. READ MORE

  5. 18. Microstructure and Mechanical Properties of Plasma Atomized Refractory Alloys

    Author : Marina Ciurans Oset; Farid Akhtar; Johanne Mouzon; Dariusz Jarzabek; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; plasma atomization; spherical powder; tungsten carbide; high entropy alloy; refractory; Engineering Materials; Materialteknik;

    Abstract : Plasma centrifugal atomization is a method widely used in the production of spherical powders of metals and alloys with relatively low melting points. A novel plasma centrifugal atomization process suitable for high melting point materials (i.e. 3500 ᵒC and above) was developed by Metasphere Technology AB, currently Höganäs Sweden AB. READ MORE

  6. 19. Microstructure engineering of additively manufactured materials by powder bed fusion-laser beam: Cases for ferritic stainless steels and medium entropy alloys

    Author : Bala Malladi; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; ferritic stainless steels; recrystallization; interstitial solid solution strengthening; phase transformation; inoculation; medium entropy alloys; Laser-based powder bed fusion; microstructural characterization;

    Abstract : Powder bed fusion laser beam (PBF-LB) is a powder bed fusion additive manufacturing process that is one of the most established and widely used techniques for manufacturing near net shape components. The unique characteristics of PBF-LB, such as the high cooling rates and local directional heat transfer, lead to the formation of unique microstructures. READ MORE

  7. 20. Synthesis and Characterization of High Entropy Alloy and Coating

    Author : Sajid Alvi; Farid Akhtar; Marta-Lena Antti; Don Seo; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Engineering Materials; Materialteknik;

    Abstract : High entropy alloys (HEAs) are a new class of alloys that contains five or more principal elements in equiatomic or near-equiatomic proportional ratio. The configuration entropy in the HEAs tends to stabilize the solid solution formation, such as body-centered-cubic (BCC), face-centered-cubic (FCC) and/or hexagonal-closed-pack (HCP) solid solution. READ MORE