Sökning: "High entropy materials"

Visar resultat 1 - 5 av 64 avhandlingar innehållade orden High entropy materials.

  1. 1. Microstructure development and mechanical properties of cast and thermo-mechanically treated eutectic high-entropy alloys

    Författare :Adrianna Lozinko; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; strength-ductility trade-off; eutectic alloys; recrystallization; EBSD; heterogeneous structure; high-entropy alloys;

    Sammanfattning : The recently emerging high-entropy alloys (HEAs) present a novel alloying strategy, significantly expanding the scope of metal alloy design. Single-phase HEAs, nevertheless, suffer from the strength-ductility trade off as seen in conventional metallic materials. LÄS MER

  3. 2. Heterogeneous deformation of multi-phase engineering materials - an in-situ neutron diffraction study

    Författare :Nitesh Raj Jaladurgam; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Eutectic high entropy alloys; in-situ neutron diffraction; Deformation mechanisms; Superalloys; Electron microscopy;

    Sammanfattning : Gas turbines are complex power generation systems used in aerospace or land-based-power stations. Materials such as Ni-base superalloys are involved in the combustion zone of these machines, which continuously experiences harsh environments with loading at high temperatures. LÄS MER

  4. 3. Alloy Design and Optimization of Mechanical Properties of High-Entropy Alloys

    Författare :Saad Ahmed Sheikh; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; ductility; topologically closed-pack TCP and geometrically closed-pack GCP phase; alloy design; mechanical properties; High-entropy alloys; refractory high-entropy alloys; valence electron concentration;

    Sammanfattning : High-entropy alloys (HEAs) are described as alloys containing multi-principal elements in equal or close to equal atomic percentage. HEAs are considered as potential structural materials for high-temperature applications; where alloy design and optimization of mechanical properties is extremely critical. LÄS MER

  5. 4. High-entropy boron-carbide and its composites

    Författare :Hanzhu Zhang; Farid Akhtar; Peizhong Feng; Yong Zhang; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Engineering Materials; Materialteknik;

    Sammanfattning : High-entropy alloy (HEA) is a multicomponent alloy material that contains five or more principal elements in equi- or near equi-atomic ratios. The entropy stabilisation leads to the formation of a crystalline solid solution accommodating the principal elements. LÄS MER

  7. 5. Ab initio Investigation of Al-doped CrMnFeCoNi High-Entropy Alloys

    Författare :Xun Sun; Levente Vitos; Andreas Blomqvist; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; High-entropy alloys; Phase stability; Elastic anisotropy; Brittle ductile transition; Pugh criterion; First-principles calculation; Teknisk materialvetenskap; Materials Science and Engineering;

    Sammanfattning : High-entropy alloys (HEAs) represent a special group of solid solutions containing five or more principal elements. The new design strategy has attracted extensive attention from the materials science community. The design and development of HEAs with desired properties have become an important subject in materials science and technology. LÄS MER