Search for dissertations about: "Arc"

Showing result 1 - 5 of 238 swedish dissertations containing the word Arc.

  1. 1. Modelling of Electric Arc Welding arc-electrode coupling

    University dissertation from Gothenburg : Chalmers University of Technology

    Author : Alireza Javidi Shirvan; Isabelle Choquet; Håkan Nilsson; Alexei Heintz; [2013]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; electric welding; arc welding simulation; electrode; plasma; cathode layer; sheath; arc discharge; Manufacturing and materials engineering; Produktions- och materialteknik;

    Abstract : Arc welding still requires deeper process understanding and more accurateprediction of the heat transferred to the base metal. This can be provided by CFD modelling.Most works done to model arc discharge using CFD consider the arc corealone. READ MORE

  2. 2. Modelling of cathode-plasma interaction in short high-intensity electric arc : Application to Gas Tungsten Arc Welding

    University dissertation from Göteborg : Chalmers University of Technology

    Author : Alireza Javidi Shirvan; Isabelle Choquet; Håkan Nilsson; Armelle Vardelle; [2016]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electric arc discharge; sheath; pre-sheath; Knudsen layer; doped refractory cathode; arc-cathode coupling; Gas Tungsten Arc simulation; OpenFOAM.; Production Technology; Produktionsteknik; Manufacturing and materials engineering; Produktions- och materialteknik;

    Abstract : In arc welding the quality of the weld is strongly influenced by the thermal history of the workpiece which is itself governed by the electric arc heat source. The models for predicting weld properties thus need a good evaluation of the distribution of the heat input from thearc to the workpiece. READ MORE

  3. 3. Modelling of Electric Arc Welding: arc-electrode coupling

    University dissertation from Göteborg : Chalmers University of Technology

    Author : Alireza Javidi-Shirvan; [2013]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; sheath; cathode layer; plasma; arc welding simulation; arc discharge;

    Abstract : Arc welding still requires deeper process understanding and more accurate prediction of the heat transferred to the base metal. This can be provided by CFD modelling.Most works done to model arc discharge using CFD consider the arc core alone. READ MORE

  4. 4. Modelling of cathode-plasma interaction in short high-intensity electric arc - Application to Gas Tungsten Arc Welding

    University dissertation from Göteborg : Chalmers University of Technology

    Author : Alireza Javidi-Shirvan; [2016]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; sheath; Gas Tungsten Arc simulation; doped refractory cathode; Knudsen layer; electric arc discharge; OpenFOAM.; pre-sheath; arc-cathode coupling;

    Abstract : In arc welding the quality of the weld is strongly influenced by the thermal history of the workpiece which is itself governed by the electric arc heat source. The models for predicting weld properties thus need a good evaluation of the distribution of the heat input from the arc to the workpiece. READ MORE

  5. 5. Cathodic arc deposition process

    University dissertation from Linköping : Linköping University Electronic Press

    Author : Muhammad Bilal Syed; Magnus Odén; Jianqiang Zhu; Lars Hultman; Zdeněk Hubička; [2019]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : This thesis aims to expand the knowledge of fundamental mechanisms that govern the cathodic arc process. The first part of this thesis explores and explains the correlations between a rather unexplored process parameter (i.e. cathode microstructure) and the microstructure of the coatings. READ MORE