• Additive manufacture of superduplex stainless steel using WAAM 

      Eriksson, Magnus Carl Fredrik; Lervåg, Malin; Sørensen, Camilla; Robertstad, Andreas; Brønstad, Bård M.; Nyhus, Bård; Aune, Ragnhild; Ren, Xiaobo; Akselsen, Odd Magne (Peer reviewed; Journal article, 2018)
      Superduplex stainless steels have been used in the oil and gas industry for a couple of decades due to the combination of excellent mechanical properties and corrosion resistance. The present investigation addresses the ...
    • Additive Manufacturing with Superduplex Stainless Steel Wire by CMT Process 

      Lervåg, Malin; Sørensen, Camilla; Robertstad, Andreas; Brønstad, Bård M.; Nyhus, Bård; Eriksson, Magnus Carl Fredrik; Aune, Ragnhild; Ren, Xiaobo; Akselsen, Odd Magne; Bunaziv, Ivan (Peer reviewed; Journal article, 2020)
      For many years, the oil and gas industry has utilized superduplex stainless steels due to their high strength and excellent corrosion resistance. Wire arc additive manufacturing (WAAM) was used with superduplex filler wire ...
    • Effect of low temperature tensile properties on crack driving force for Arctic applications 

      Dahl, Bjørn Augdal; Ren, Xiaobo; Akselsen, Odd Magne; Nyhus, Bård; Zhang, Zhiliang (Peer reviewed; Journal article, 2017)
      Many petroleum companies expand their activities further north towards the Arctic region, resulting in design temperatures down to −60 °C, which is much lower than what is usual for most current petroleum installations. ...
    • Effect of Sigma Phase in Wire Arc Additive Manufacturing of Superduplex Stainless Steel 

      Akselsen, Odd Magne; Bjørge, Ruben; Ånes, Håkon Wiik; Ren, Xiaobo; Nyhus, Bård (Peer reviewed; Journal article, 2021)
      In the present study, the thermal program in wire and arc additive manufacturing has been varied in terms of heat input and interpass temperature. Three walls were completed with subsequent Charpy V impact toughness and ...
    • Experimental and numerical investigation of strain distribution of notched lead fatigue test specimen 

      Johanson, Audun; Viespoli, Luigi Mario; Nyhus, Bård; Alvaro, Antonio; Berto, Filippo (Journal article; Peer reviewed, 2018)
    • Fatigue investigation of complex weldments by the means of the local strain energy density approach 

      Viespoli, Luigi Mario; Alvaro, Antonio; Nyhus, Bård; Berto, Filippo (Journal article; Peer reviewed, 2018)
    • Fracture toughness and hydrogen embrittlement susceptibility on the interface of clad steel pipes with and without a Ni-interlayer. 

      Jemblie, Lise; Bjaaland, Helena; Nyhus, Bård; Olden, Vigdis; Akselsen, Odd Magne (Peer reviewed; Journal article, 2017)
      The objective of the present work has been to study the fracture properties of the interface between clad and base material of two 316 L austenitic stainless steel - X60/X65 carbon steel hot roll bonded clad pipes; with ...
    • Laser Beam and Laser-Arc Hybrid Welding of Aluminium Alloys 

      Bunaziv, Ivan; Akselsen, Odd Magne; Ren, Xiaobo; Nyhus, Bård; Eriksson, Magnus Carl Fredrik (Peer reviewed; Journal article, 2021)
      Aluminium alloys are widely used in many industries due to their high strength-to-weight ratios and resistance to corrosion. Due to their specific thermophysical properties and intricate physical metallurgy, these alloys ...
    • Laser-arc hybrid welding of 12- and 15-mm thick structural steel 

      Bunaziv, Ivan; Dørum, Cato; Nielsen, Steen Erik; Suikkanen, Pasi; Ren, Xiaobo; Nyhus, Bård; Eriksson, Magnus Carl Fredrik; Akselsen, Odd Magne (Peer reviewed; Journal article, 2020)
      High-power lasers are very effective in welding of plates thicker than 10 mm due to the keyhole mode. High-power intensity generates a vapor-filled cavity which provides substantial penetration depth. Due to the narrow and ...
    • A Review on Laser-Assisted Joining of Aluminium Alloys to Other Metals 

      Bunaziv, Ivan; Akselsen, Odd Magne; Ren, Xiaobo; Nyhus, Bård; Eriksson, Magnus Carl Fredrik; Gulbrandsen-Dahl, Sverre (Peer reviewed; Journal article, 2021)
      Modern industry requires different advanced metallic alloys with specific properties since conventional steels cannot cover all requirements. Aluminium alloys are becoming more popular, due to their low weight, high corrosion ...
    • A Review on Laser-Assisted Joining of Aluminium Alloys to Other Metals 

      Bunaziv, Ivan; Akselsen, Odd Magne; Ren, Xiaobo; Nyhus, Bård; Eriksson, Magnus Carl Fredrik; Gulbrandsen-Dahl, Sverre (Peer reviewed; Journal article, 2021)
      Modern industry requires different advanced metallic alloys with specific properties since conventional steels cannot cover all requirements. Aluminium alloys are becoming more popular, due to their low weight, high corrosion ...
    • Room temperature creep mechanism of a Pb-Sn-Sb lead alloy 

      Viespoli, Luigi Mario; Johanson, Audun; Alvaro, Antonio; Nyhus, Bård; Berto, Filippo (Peer reviewed; Journal article, 2019)
      Lead alloys are the most common materials adopted for the production of subsea power cable sheathing. The sheathing is a layer of stable and watertight metal, which serves to prevent the electrical failure of the cable. ...
    • Root formation and mechanical properties in laser keyhole welding of 15 mm thick HSLA steel 

      Bunaziv, Ivan; Dørum, Cato; Nielsen, Steen Erik; Suikkanen, Pasi; Ren, Xiaobo; Nyhus, Bård; Eriksson, Magnus Carl Fredrik; Akselsen, Odd Magne (Peer reviewed; Journal article, 2021)
      Deep penetration laser welding is promising in joining thick (> 10 mm) steel sections. Focused laser beam by drilling vapour cavity, the keyhole, generates deep and narrow welds. Full penetration single-pass joining has a ...
    • Root formation and metallurgical challenges in laser beam and laser-arc hybrid welding of thick structural steel 

      Bunaziv, Ivan; Dørum, Cato; Nielsen, Steen Erik; Suikkanen, Pasi; Ren, Xiaobo; Nyhus, Bård; Eriksson, Magnus Carl Fredrik; Akselsen, Odd Magne (Peer reviewed; Journal article, 2021)
      Single-pass laser beam welding (LBW) of steel components with wall thickness of > 10 mm is of high interest due to enhanced productivity. Deep penetration LBW provides excessive hardness and certain quality issues such as ...
    • Strain controlled medium cycle fatigue of a notched Pb-Sn-Cd lead alloy 

      Viespoli, Luigi Mario; Johanson, Audun; Alvaro, Antonio; Nyhus, Bård; Berto, Filippo (Peer reviewed; Journal article, 2019)
      During the extrusion process of subsea power cable sheathing layer it is possible that metallic and/or non-metallic debris present in the processing environment enter the metal lattice originating discontinuities that might ...
    • Subsea power cable sheathing: an investigation of lead fatigue performance 

      Viespoli, Luigi Mario; Johanson, Audun; Alvaro, Antonio; Nyhus, Bård; Berto, Filippo (Peer reviewed; Journal article, 2020)
      The protection of subsea power cables against electrical failure is achieved by the use of a watertight layer. Due to its properties of chemical stability and ductility, lead has been the material of choice for this purpose ...
    • Tensile characterization of a lead alloy: creep induced strain rate sensitivity 

      Viespoli, Luigi Mario; Johanson, Audun; Alvaro, Antonio; Nyhus, Bård; Sommacal, Alberto; Berto, Filippo (Journal article; Peer reviewed, 2018)
    • Thermo-mechanical tensile testing of geothermal casing materials 

      Gruben, Gaute; Dillingh, Bert; Kaldal, Gunnar Skulason; Hoang, Nguyen-Hieu; Wollenweber, Jens; Rørvik, Gisle; Thorbjornsson, Ingólfur Ö; Nyhus, Bård (Peer reviewed; Journal article, 2021)
      Ultra-high temperature geothermal wells (>450 °C) have a large potential for increased energy yield as compared to conventional high-temperature geothermal wells (200-300 °C), but several research challenges must be resolved ...