Search for dissertations about: "spot welds"

Showing result 6 - 9 of 9 swedish dissertations containing the words spot welds.

  2. 6. Multi-axial fatigue of welded details

    Author : Mathias Bokesjö; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : Welds and welded joints are nowadays very common in steel structures. Since thewelded parts also are susceptible to fatigue, they can have a major influence on thetotal life of the structure. READ MORE

  4. 7. Optical detection of joint position in zero gap laser beam welding

    Author : Morgan Nilsen; Anna-Karin Christiansson; Fredrik Sikström; Högskolan Väst; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Laser beam welding; Optical sensors; Joint tracking; Production Technology; Produktionsteknik; Manufacturing and materials engineering; Produktions- och materialteknik;

    Abstract : This thesis presents an experimental study on how to track zero gaps between metal sheets to be joined by laser beam butt welding. Automated laser beam welding is gaining interest due to its ability to produce narrow and deep welds giving limited heat input and therefore less distortions compared to other processes, such as arc-welding. READ MORE

  5. 8. Weldability of Precipitation Hardening Superalloys – Influence of Microstructure

    Author : Joel Håkan Andersson; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Hot cracking; GTAW; Transvarestraint testing; Varestraint testing; Gleeble testing; Solidification cracking; HAZ liquation cracking; Repair welding; Strain age cracking; EBW; DSC thermal analysis;

    Abstract : Superalloys and in particular the precipitation hardened Ni-based superalloys havealways been used extensively in the hot sections of jet engines. Large hot structuralengine components with complex geometry have preferably been cast as single piececomponents since the large scale vacuum investment casting process becameavailable about fifty years ago. READ MORE

  6. 9. Imaging and analysis methods for automated weld inspection

    Author : Patrik Broberg; Tadeusz Stepinski; Högskolan Väst; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Welding; materials; Manufacturing and materials engineering; Produktions- och materialteknik; Experimental Mechanics;

    Abstract : All welding processes can give rise to defects, which weakens the joint and can eventually lead to the failure of the welded structure. In order to inspect welds for detects, without affecting the usability of the product, non-destructive testing (NDT) is needed. READ MORE