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Additive Manufacturing with Superduplex Stainless Steel Wire by CMT Process

Additive Manufacturing with Superduplex Stainless Steel Wire by CMT Process

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Sammendrag
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 cooling cycles during layer deposition, brittle secondary phases may form such as intermetallic sigma (σ) phase. By inspecting deposited walls within wide range of heat inputs (0.40–0.87 kJ/mm), no intermetallic phases formed due to low inter-pass temperatures used, together with the high Ni content in the applied wire. Lower mechanical properties were observed with high heat inputs due to low ferrite volume fraction, precipitation of Cr nitrides and formation of secondary austenite. The walls showed good toughness values based on both Charpy V-notch and CTOD (crack tip opening displacement) testing
Språk
Engelsk
Forfatter(e)
  • Lervåg Malin
  • Sørensen Camilla
  • Robertstad Andreas
  • Brønstad Bård M.
  • Nyhus Bård
  • Eriksson Magnus Carl Fredrik
  • Aune Ragnhild
  • Ren Xiaobo
  • Akselsen Odd Magne
  • Bunaziv Ivan
Institusjon(er)
  • SINTEF Industri / Materialer og nanoteknologi
  • Norges teknisk-naturvitenskapelige universitet
År
2020
Publisert i
Metals
ISSN
2075-4701
Årgang
10
Hefte nr.
2