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Effect of welding position on properties of duplex and superduplex stainless steel circumferential welds
University West, Department of Engineering Science, Division of Manufacturing Processes. (Welding research group, PTW)ORCID iD: 0000-0003-3374-6282
University West, Department of Engineering Science, Divison of Natural Sciences, Surveying and Mechanical Engineering. (PTW)ORCID iD: 0000-0001-8822-2705
University West, Department of Engineering Science, Division of Manufacturing Processes. (PTW)ORCID iD: 0000-0003-2560-0531
University West, Department of Engineering Science, Division of Manufacturing Processes. (PTW)ORCID iD: 0000-0002-0234-3168
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2015 (English)In: Welding in the World, ISSN 0043-2288, E-ISSN 1878-6669, Vol. 59, no 5, 693-703 p.Article in journal (Refereed) Published
Abstract [en]

The influence of welding position on properties ofduplex and superduplex stainless steel welds was studied. Circumferential pipe welds were produced using mechanised gasmetal arc welding in flat position, vertical up position and overhead position. Dilution, corrosion resistance, mechanical properties, microstructural features and weld imperfections were assessed and related to the welding position. Welds produced in flat and vertical up positions were less likely to produce porosity than those welded in overhead position, whilst underfill was not observed in overhead position welds. All the duplex pipe welds passed the corrosion test regardless of the welding position and showed sound microstructures. Under fixed arc energy conditions, welds produced in vertical up position showed the lowest dilution values whilst welds in flat position showed the highest. Excellent impact toughness values and cross tensile values were found regardless of the welding positions. Whenever possible, flat position is recommended as welds showed less proneness to porosity. Vertical up position is recommended as the second best choice.

Place, publisher, year, edition, pages
2015. Vol. 59, no 5, 693-703 p.
Keyword [en]
Duplex stainless steel, Welding, GMA welding, Welding position
National Category
Manufacturing, Surface and Joining Technology
Research subject
ENGINEERING, Manufacturing and materials engineering
Identifiers
URN: urn:nbn:se:hv:diva-7590DOI: 10.1007/s40194-015-0245-0ISI: 000363866000010Scopus ID: 2-s2.0-84938504405OAI: oai:DiVA.org:hv-7590DiVA: diva2:810711
Available from: 2015-05-08 Created: 2015-05-08 Last updated: 2016-02-10Bibliographically approved

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Valiente Bermejo, María AsunciónKarlsson, LeifSvensson, Lars-ErikHurtig, Kjell
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Division of Manufacturing ProcessesDivison of Natural Sciences, Surveying and Mechanical Engineering
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Welding in the World
Manufacturing, Surface and Joining Technology

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