To main content

Ivan Bunaziv

Research Scientist

Ivan Bunaziv

Research Scientist

Ivan Bunaziv
Phone: 457 95 269
Department: Materials and Nanotechnology
Office: Trondheim

Publications and responsibilities

Publication
https://www.sintef.no/en/publications/publication/?pubid=CRIStin+1805041

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 deep weld geometry, there is susceptibility to high hardness and weld defects...

Authors Bunaziv Ivan Dørum Cato Nielsen Steen Erik Suikkanen Pasi Ren Xiaobo Nyhus Bård Eriksson Magnus Carl Fredrik Akselsen Odd Magne
Year 2020
Type Journal publication
Publication
https://www.sintef.no/en/publications/publication/?pubid=CRIStin+1801786

Welds made by high power laser beam have deep and narrow geometry. Addition of filler wire by the arc source, forming the laser-arc hybrid welding (LAHW) process, is very important to obtain required mechanical properties. Distribution of molten wire throughout the entire weld depth is of concern si...

Authors Bunaziv Ivan Wenner Sigurd Ren Xiaobo Frostevarg Jan Kaplan Alexander F.H. Akselsen Odd Magne
Year 2020
Type Journal publication
Publication
https://www.sintef.no/en/publications/publication/?pubid=CRIStin+1801783

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 to create walls with different heat input. Due to the multiple heating and co...

Authors Lervåg Malin Sørensen Camilla Robertstad Andreas Brønstad Bård M. Nyhus Bård Eriksson Magnus Carl Fredrik Aune Ragnhild Ren Xiaobo Akselsen Odd Magne Bunaziv Ivan
Year 2020
Type Journal publication
Publication
https://www.sintef.no/en/publications/publication/?pubid=CRIStin+1750275

Laser beam welding (LBW) and laser-arc hybrid welding (LAHW) are attractive joining methods of medium thickness (10-20 mm) plates in a single pass welding technique. Both utilize high energy process in order to achieve high penetration depth and high welding speeds offering substantial increase in p...

Authors Bunaziv Ivan Dørum Cato Ren Xiaobo Eriksson Magnus Carl Fredrik Akselsen Odd Magne
Year 2019
Type Journal publication
Publication
https://www.sintef.no/en/publications/publication/?pubid=CRIStin+1750269

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 depth and microstructure evolution in dry hyperbaric welding of X70 pipeline s...

Authors Bunaziv Ivan Aune Ragnhild Olden Vigdis Akselsen Odd Magne
Year 2019
Type Journal publication
Publication
https://www.sintef.no/en/publications/publication/?pubid=CRIStin+1747417

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) the pipe being API X60 or X65 high-strength carbon steel, and (iii) the weldi...

Authors Bunaziv Ivan Olden Vigdis Akselsen Odd Magne
Year 2019
Type Journal publication