Sökning: "Nickel based superalloys"

Visar resultat 1 - 5 av 26 avhandlingar innehållade orden Nickel based superalloys.

  1. 1. Nickel-Based Single-Crystal Superalloys the crystal orientation influence on high temperature properties

    Detta är en avhandling från Linköping : Linköping University Electronic Press

    Författare :Mikael Segersäll; Linköpings universitet.; Linköpings universitet.; [2013]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : Superalloys are a group of materials that are used in high temperature applications, for example gas turbines and aero engines. Gas turbines are most commonly used for power generation, and it is only the very critical components which are exposed to the most severe conditions within the turbine, which are made from superalloy material. LÄS MER

  2. 2. Characterisation of Nickel-Based Superalloys Manufactued by Electron Beam Melting

    Detta är en avhandling från Chalmers University of Technology

    Författare :Annika Strondl; Chalmers tekniska högskola.; Chalmers University of Technology.; [2010]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Konstruktionsmaterial; Construction materials; Övrig bearbetning sammanfogning; Other processing assembly; additive manufacturing; electron beam melting; nickel-based superalloys; XRD; DTA; SEM; EDS; EBSD; TEM; APFIM;

    Sammanfattning : Nickel-based superalloys have been manufactured by electron beam melting (EBM). EBM is an additive manufacturing process for direct production of metal parts. The part is build up by successive melting of metal powder layers in a vacuum chamber using electron beam. LÄS MER

  3. 3. Hot Cracking and Grain Boundary Weaknesses of Nickel - Based Superalloys

    Detta är en avhandling från Chalmers University of Technology

    Författare :Joel Andersson; Chalmers tekniska högskola.; Chalmers University of Technology.; [2008]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Teknisk materialvetenskap; Materials science; Superalloys; Grain boundary weaknesses; Notch rupture testing; Varestraint testing; Weldability; Hot cracks; Eutectic;

    Sammanfattning : Abstract Grain boundary weaknesses of nickel-based superalloys not only materialize during service in the hot turbine engine sections but also during the weld manufacturing. The performance, in this respect, of the most commonly used alloys at Volvo Aero Corporation (VAC), 718 and the higher temperature capacity Waspaloy, are therefore the main subjects for this thesis. LÄS MER

  4. 4. Microstructure of Nickel-Chromium Superalloys

    Detta är en avhandling från Chalmers University of Technology

    Författare :Mattias Thuvander; Chalmers tekniska högskola.; Chalmers University of Technology.; [1998]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Fysik; Physics; nickel alloy; grain boundary; precipitation; segregation; ordering; APFIM; TEM; SIMS; carbide; boride;

    Sammanfattning : The microstructure of nickel-chromium superalloys has been investigated using several advanced microanalytical techniques; atom probe field ion microscopy (APFIM), transmission electron microscopy (TEM) together with energy dispersive X-ray analysis (EDX) and electron energy loss spectroscopy (EELS), secondary ion mass spectroscopy (SIMS) and optical microscopy (OM). The features primarily considered include precipitation, segregation and ordering. LÄS MER

  5. 5. Aluminide Diffusion Coatings for Ni Based Superalloys. Coating and Oxide Microstructure

    Detta är en avhandling från Chalmers University of Technology

    Författare :Johan Angenete; Chalmers tekniska högskola.; Chalmers University of Technology.; [2002]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Teknisk materialvetenskap; Materials science; high temperature oxidation; aluminide diffusion coatings; nickel based superalloys; SEM; TEM; microstructure;

    Sammanfattning : This thesis reports on investigations of high temperature oxidation resistant aluminide diffusion coatings for Ni based superalloys. Such coatings basically consist of a .BETA.-NiAl layer at the surface of the . LÄS MER