Sökning: "surface treatment of casting"

Visar resultat 1 - 5 av 22 avhandlingar innehållade orden surface treatment of casting.

  1. 1. Investigation of Surface Formation in As-Cast and Homogenized 6xxx Aluminium Billets

    Författare :Nazlin Bayat; Torbjörn Carlberg; Håkan Olin; Yanjun Li; Mittuniversitetet; []
    Nyckelord :DC casting; surface segregation; surface defects; intermetallic phase; phase transformation; homogenization;

    Sammanfattning : The direct chill (DC) casting technique to produce billets for extrusion and ingots for rollingwas developed in the 1930s. The principle, which is still valid, is a two-stage cooling with a primary cooling at a mould surface followed by water spraying directly on the surface. LÄS MER

  3. 2. Microstructure Modelling of Additive Manufacturing of Alloy 718

    Författare :Chamara Kumara; Per Nylén; Johan Moverare; Högskolan Väst; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Phase-Field Modelling; Laser metal powder directed energy deposition; Electron Beam Melting; Heat Treatment; Superalloy; Production Technology; Produktionsteknik; Manufacturing and materials engineering; Produktions- och materialteknik;

    Sammanfattning : In recent years, additive manufacturing (AM) of Alloy 718 has received increasing interest in the field of manufacturing engineering owing to its attractive features compared to those of conventional manufacturing methods. The ability to produce complicated geometries, low cost of retooling, and control of the microstructure are some of the advantages of the AM process over traditional manufacturing methods. LÄS MER

  4. 3. Rheocasting of Aluminium Alloys : Slurry Formation, Microstructure, and Properties

    Författare :Mostafa Payandeh; A. E. W. Jarfors; Torbjörn Carlberg; Jönköping University; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; SSM Casting; aluminium alloy; RheoMetalTM process; microstructure; physical and mechanical properties;

    Sammanfattning : Innovative materials with novel properties are in great demand for use in the criticalcomponents of emerging technologies, which promise to be more cost-effective and energyefficient.A controversial issue with regard to manufacturing complex industrial products isto develop advanced materials with optimised manufacturability in addition to the requiredmechanical and physical properties. LÄS MER

  5. 4. Crystallinity and Morphology of Starch Polymers in Films

    Författare :Åsa Rindlav Westling; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; morphology; amylose; surface; thermal transitions; amylopectin; starch; crystallinity; film;

    Sammanfattning : Starch is a renewable material that can be converted into biodegradable plastic products, or films with excellent oxygen barrier properties. Films of potato starch, amylose, amylopectin and blends thereof were made by solution casting. LÄS MER

  7. 5. Varestraint Weldability Testing of Cast Superalloys

    Författare :Sukhdeep Singh; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Varestraint; Hot Cracking; Welding; Alloy 718; Cast Superalloys; ATI® 718 PlusTM; HIP;

    Sammanfattning : Precipitation hardened Ni- and Ni-Fe- based superalloys, used in hot structural components for aero engines, are subjected to hot cracking phenomena during manufacturing and specifically in welding. This type of cracking involves metallurgical reactions from the liquid phase in concomitance to weld restraints. LÄS MER