Search for dissertations about: "spot weld"

Showing result 1 - 5 of 13 swedish dissertations containing the words spot weld.

  1. 1. Mechanical Properties of Resistance Spot Welds in Lightweight Applications

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Davood Afshari; KTH.; [2013]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Spot Weld; Aluminum alloy; Mechanical Properties; Finite Element; SRA - Production; SRA - Produktion;

    Abstract : This licentiate thesis is concerned with residual stresses in aluminum alloy 6061-T6 resistance spot welded joint. Several topics related to mechanical strength of welded structures are treated such as; nugget size and microhardness and microstructures of weld zone and their influence on mechanical strength of welded structure, failure load measurement using tensile-shear test, resistance spot welding simulation, residual stress measurement by X-ray diffraction method and analysis effect of welding parameters on the mechanical strength and the residual stresses. READ MORE

  2. 2. Corrosion Fatigue of Stainless Steels

    University dissertation from Stockholm : Materialvetenskap

    Author : Jan Linder; KTH.; [2001]
    Keywords : Stainless steel; corrosion fatigue; crack propagation; spot weld;

    Abstract : The aim of this work was to investigate the effect ofchloride-containing environments on corrosion fatigueproperties for different stainless steels grades. The steelsinvestigated ranged from the standard 304 grade to thesuperaustenitic 654SMO and the superduplex SAF2507. READ MORE

  3. 3. Fatigue strength of engineering materials the influence of environment and porosity

    University dissertation from Stockholm : KTH

    Author : Jan Linder; KTH.; [2006]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Stainless steel; cast aluminium; hardened steels; fatigue; corrosion; crack propagation; spot weld; porosity; TECHNOLOGY Materials science Other materials science; TEKNIKVETENSKAP Teknisk materialvetenskap Övrig teknisk materialvetenskap;

    Abstract : The objective of this work was to use LEFM in order to assess the detrimental influence of surrounding chloride-containing environments for stainless steels, hardened steel as well as for a cast aluminium alloy. An additional aim was also to use LEFM to assess the influence of porosity on the fatigue properties for different commercial cast aluminium alloys and manufacturing methods. READ MORE

  4. 4. Process planning of resistance spot welding

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Oscar Andersson; KTH.; [2013]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : Manufacturing engineering in general has experienced an increased demand of process planning in order to optimize processes to reduce costs, environmental impact and increase time efficiency. Resistance spot welding (RSW) is a common and large-scale joining method in several manufacturing industries indicating significant potentials of efficient process planning. READ MORE

  5. 5. Power electronics for resistance spot welding equipment

    University dissertation from Sundsvall : Mid Sweden University

    Author : Jawad Saleem; Mittuniversitetet.; [2012]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : Resistance spot welding is an inexpensive and efficient way ofjoining metals. It has extensive applications in household appliancesand in automotive industries. The traditional approach in relation tospot welding machines is to use 50 Hz welding transformers. Thedrawback associated with these transformers is that they are both heavyand bulky. READ MORE