• 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 ...
    • Application of laser-arc hybrid welding of steel for low-temperature service 

      Bunaziv, Ivan; Akselsen, Odd Magne; Frostevarg, Jan; Kaplan, Alexander F.H. (Journal article; Peer reviewed, 2019)
      Laser-arc hybrid welding (LAHW) is more often used in shipbuilding and oil and gas industries in recent years. Its popularity arises due to many advantages compared to conventional arc welding processes. The laser beam ...
    • Cohesive zone modelling of hydrogen induced cracking on the interface of clad steel pipes 

      Jemblie, Lise; Olden, Vigdis; Maincon, Philippe Emmanuel; Akselsen, Odd Magne (Peer reviewed; Journal article, 2017)
      A coupled finite element hydrogen diffusion and cohesive zone modelling approach has been applied to simulate hydrogen induced fracture initiation in a hot rolled bonded clad steel pipe. The results are compared to ...
    • Comparative study of eutectic Al-Si alloys manufactured by WAAM and casting 

      Langelandsvik, Geir; Horgar, Annbjørg; Furu, Trond; Roven, Hans Jørgen; Akselsen, Odd Magne (Peer reviewed; Journal article, 2020)
      Wire and arc additive manufacturing (WAAM) of metallic materials is expected to become part of the new industrial revolution. The possibilities for complex designs and superior mechanical properties can in many cases replace ...
    • A coupled diffusion and cohesive zone modelling approach for numerically assessing hydrogen embrittlement of steel structures 

      Jemblie, Lise; Olden, Vigdis; Akselsen, Odd Magne (Peer reviewed; Journal article, 2017)
      Simulation of hydrogen embrittlement requires a coupled approach; on one side, the models describing hydrogen transport must account for local mechanical fields, while on the other side, the effect of hydrogen on the ...
    • Development of Al-TiC Wire Feedstock for Additive Manufacturing by Metal Screw Extrusion 

      Langelandsvik, Geir; Grandcolas, Mathieu; Skorpen, Kristian Grøtta; Furu, Trond; Akselsen, Odd Magne; Roven, Hans Jørgen (Metals;2075-4701, Peer reviewed; Journal article, 2020)
      The development of customised aluminium alloys for welding and additive manufacturing (AM) is proposed to solve several quality issues and to enhance the mechanical integrity of components. The introduction of ceramic grain ...
    • Dry hyperbaric welding of HSLA steel up to 35 bar ambient pressure with CMT arc mode 

      Bunaziv, Ivan; Aune, Ragnhild; Olden, Vigdis; Akselsen, Odd Magne (Peer reviewed; Journal article, 2019)
      Hyperbaric welding plays a significant role in subsea pipeline installations and repairs for transport of oil and gas from the offshore field to the market. The effect of ambient pressure, from 1 to 35 bar, on penetration ...
    • 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 ...
    • Filler metal distribution and processing stability in laser-arc hybrid welding of thick HSLA steel 

      Bunaziv, Ivan; Wenner, Sigurd; Ren, Xiaobo; Frostevarg, Jan; Kaplan, Alexander F.H.; Akselsen, Odd Magne (Peer reviewed; Journal article, 2020)
      Welds made by high power laser beam have deep and narrow geometry. Addition offiller wire by the arc source,forming the laser-arc hybrid welding (LAHW) process, is very important to obtain required mechanical prop-erties. ...
    • 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 ...
    • Hybrid Welding of 45 mm High Strength Steel Sections 

      Bunaziv, Ivan; Frostevarg, Jan; Akselsen, Odd Magne; Kaplan, Alexander F.H. (Peer reviewed; Journal article, 2017)
      Thick section welding has significant importance for oil and gas industry in low temperature regions. Arc welding is usually employed providing suitable quality joints with acceptable toughness at low temperatures 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 ...
    • Metallurgical Aspects in the Welding of Clad Pipelines—A Global Outlook 

      Bunaziv, Ivan; Olden, Vigdis; Akselsen, Odd Magne (Journal article; Peer reviewed, 2019)
      In the present work, the metallurgical changes in the welding of clad pipelines are studied. Clad pipes consist of a complex multi-material system, with (i) the clad being stainless steel or a nickel-based superalloy, (ii) ...
    • Porosity and solidification cracking in welded 45 mm thick steel by fiber laser-MAG process 

      Bunaziv, Ivan; Frostevarg, Jan; Ren, Xiaobo; Kaplan, Alexander F.H.; Akselsen, Odd Magne (Journal article; Peer reviewed, 2019)
      Porosity and solidification cracking in joining of thick sections are very common issues in deep penetration keyhole laser-arc hybrid welding (LAHW). In the present work, 45 mm thick high strength steel was joined by a ...
    • A review of cohesive zone modelling as an approach for numerically assessing hydrogen embrittlement of steel structures. 

      Jemblie, Lise; Olden, Vigdis; Akselsen, Odd Magne (Peer reviewed; Journal article, 2017)
      Simulation of hydrogen embrittlement requires a coupled approach; on one side, the models describing hydrogen transport must account for local mechanical fields, while on the other side, the effect of hydrogen on the ...
    • 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 ...