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Effect of welding position on properties of duplex and superduplex stainless steel circumferential welds

Valiente Bermejo, María Asunción, 1972- (author)
Högskolan Väst,Avd för tillverkningsprocesser,Welding research group, PTW
Karlsson, Leif, 1952- (author)
Högskolan Väst,Avd för naturvetenskap, lantmäteri- och maskinteknik,PTW
Svensson, Lars-Erik, 1951- (author)
Högskolan Väst,Avd för tillverkningsprocesser,PTW
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Hurtig, Kjell, 1960- (author)
Högskolan Väst,Avd för tillverkningsprocesser,PTW
Rasmuson, Helene (author)
ESAB AB, Göteborg, Sweden
Frodigh, Mette (author)
Sandvik Materials Technology, Sandviken, Sweden
Bengtsson, Per (author)
AGA Gas AB, Lidingö, Sweden
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 (creator_code:org_t)
2015-05-07
2015
English.
In: Welding in the World. - : Springer Science and Business Media LLC. - 0043-2288 .- 1878-6669. ; 59:5, s. 693-703
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • 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.

Subject headings

TEKNIK OCH TEKNOLOGIER  -- Materialteknik -- Bearbetnings-, yt- och fogningsteknik (hsv//swe)
ENGINEERING AND TECHNOLOGY  -- Materials Engineering -- Manufacturing, Surface and Joining Technology (hsv//eng)

Keyword

Duplex stainless steel
Welding
GMA welding
Welding position
Produktions- och materialteknik
Manufacturing and materials engineering

Publication and Content Type

ref (subject category)
art (subject category)

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