Sökning: "Brittle ductile transition"

Visar resultat 1 - 5 av 30 avhandlingar innehållade orden Brittle ductile transition.

  1. 1. Experiments and modelling of fracture initiation at impact

    Författare :Ola Wall; Hållfasthetslära; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; vibration and acoustic engineering; vacuum technology; hydraulics; Viscoplasticity; Mechanical engineering; Ductile; Brittle; Dynamic; Fracture; Maskinteknik; hydraulik; vakuumteknik; vibrationer; akustik; Material technology; Materiallära; materialteknik;

    Sammanfattning : The thesis addresses different questions, each necessary in the understanding of dynamic fracture initiation and crack propagation in steel. Emphasis lays on dynamic crack propagation experiments performed in the ductile to brittle transition region and possible conclusions, that can be drawn from them. LÄS MER

  3. 2. Microstructural aspects of the ductile-to-brittle transition in pressure vessel steels

    Författare :Torbjörn Narström; KTH; []
    Nyckelord :dectile-to-brittele transition; cleavage fracture; ductile fracture; fracture mechanics; constraint; initiation; pressure vessel steel; cleavage fracture stress;

    Sammanfattning : .... LÄS MER

  4. 3. Tensile strength and ductile-brittle transition in low-carbon lath martensite steels

    Författare :Lars-Åke Norström; Uppsala universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP;

    Sammanfattning : .... LÄS MER

  5. 4. On the hot crack formation during solidification of iron-base alloys

    Författare :Karin Hansson; KTH; []
    Nyckelord :hot cracking; hot tearing; cracking fracturing ; tearing; ductility; brittleness; embrittlement; fractures; ductile brittle transition; solidification; iron; copper; nickel; Invar; steels; free machining steels; stainless steels; penetration; crack;

    Sammanfattning : Hot cracking during solidification is a severe problem inmany casting processes, for example in continuous casting.Combinations of low strength and low ductility of the materialat high temperatures and applied tensile stress can cause hotcracking. 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