Sökning: "Solidification cracking"

Visar resultat 6 - 10 av 18 avhandlingar innehållade orden Solidification cracking.

  1. 6. Aluminium alloy development for Additive Manufacturing

    Författare :Freddy Leijon; Johan Moverare; Svain Skjervold; Ehsan Ghassemali; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Aluminium alloys; Alloy design; Powder bed fusion; Printability; Solidification cracking; Additive manufacturability; High through put methods; Heterogeneous nucleation;

    Sammanfattning : Powder Bed Fusion (PBF Additive Manufacturing AM have emerged as a promising manufacturing process possessing a powerful combination of characteristics. Most noticeable are the near-net-shape, short lead time and flexibility, both with regard in design freedom and in part-to-part variation. LÄS MER

  3. 7. Modeling and Simulation of Weld Hot Cracking

    Författare :Joar Draxler; Lars-Erik Lindgren; Jonas Edberg; Paul Åkerström; Jesper Hattel; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Material Mechanics; Materialmekanik;

    Sammanfattning : Several alloy systems are susceptible to weld hot cracking. Weld hot cracking occurs by fracture of liquid films, normally grain boundary liquid films, at the late stage of the solidification of the weld. The cracks can be small and therefore difficult to detect by nondestructive test methods. LÄS MER

  4. 8. On the Experimental Determination of Damping of Metals and Calculation of Thermal Stresses in Solidifying Shells

    Författare :Jonas Åberg; Hasse Fredriksson; Björn Widell; Michael Vynnycky; Toshihiko Emi; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; material damping; measurement methods; calorimetric methods; optical strain gauge measurements; hot cracking; stress in solid shells; ALE; Materials science; Teknisk materialvetenskap;

    Sammanfattning : This thesis explores experimentally and theoretically two different aspects of the properties and behaviour of metals: their ability to damp noise and their susceptibility to crack when solidifying. The first part concerns intrinsic material damping, and is motivated by increased demands from society for reductions in noise emissions. LÄS MER

  5. 9. High-performance Nickel-based Superalloys for Additive Manufacturing

    Författare :Jinghao Xu; Johan Moverare; Ru Peng; Chinnapat Panwisawas; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Nickel-based superalloy; Alloy design; Laser powder bed fusion; Cracking susceptibility; Additive manufacturability; Heat treatment; γ′ precipitate; High-temperature mechanical property; Creep; Oxidation;

    Sammanfattning : Additive manufacturing (AM), e.g., laser powder bed fusion (LPBF) technique, has become a powerful manufacturing process for producing metallic components with the advantages of design freedom, net-shape-forming flexibility, product customization, and reduced lead time to market. LÄS MER

  7. 10. An Experimental Study to Understand the Localized Corrosion and Environment-Assisted Cracking Behavior of AISI 420-Martensitic Stainless Steel

    Författare :Krishnan Hariramabadran Anantha; Jinshan Pan; Robert Akid; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Kemi; Chemistry;

    Sammanfattning : Motivation and aim: Currently steel molds are designed with cooling channels to reduce the solidification time of molten plastic within the mold to improve the productivity. As water is generally used as the cooling medium, corrosion and environment-assisted cracking (EAC) leading towards the dysfunction of mold, can increase the production downtime. LÄS MER