Weldability of a 2205 duplex stainless steel using plasma arc welding

Ureña, A.; Otero, E.; Utrilla, M. V.; Múnez, C.J.

doi:10.1016/j.jmatprotec.2006.08.030

Cited by 97 publications

(31 citation statements)

References 10 publications

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“…grain boundary allotriomorphs (GBA), Widmanstätten (WA) structure of austenite and transgranular austenite particles (IGA) 23 . However WA was predominant and it occurs when higher heat input are provided 24 . With coarsening of WA improving the low temperature toughness, affecting corrosion state 25 .…”

Section: Kn Microstructuresmentioning

confidence: 96%

Microstructural behavior of SAF 2205 Duplex Stainless Steel Welded by Friction Hydro Pillar Processing

et al. 2016

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The Friction Hydro-Pillar Process (FHPP) is an innovative process that has been recently studied regarding its possible in situ repair applications. There is still no literature about usage of the FHPP on duplex stainless steel (DSS) base materials to smaller forces than 25 kN. The investigation on DSS processing is crucial due his wide variety of critical uses in pipes and storage structures applied in chemical industry plants, where usual welding processes may lead to safety concerns. The aim of this study is to qualify the processing of SAF 2205 (UNS 31803) duplex stainless steel welded joints using FHPP as feasible repair procedure. For this, the studied samples were welded applying a range of axial forces. The welded joints were characterized by, α/γ phase ratio, intermetallic quantification, austenite spacing measurement, microhardness profile and microstructural qualitative studies. The results showed the efficiency in repair of the FHPP process on the production of DSS joints according with the material recommendations from the standard DNV-RP-F112.

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Section: Kn Microstructuresmentioning

confidence: 96%

Microstructural behavior of SAF 2205 Duplex Stainless Steel Welded by Friction Hydro Pillar Processing

et al. 2016

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“…Nevertheless, whether the regulating action is the nucleation rate remains incompletely understood [28,58,83], although the growth kinetics of this response have been widely investigated [84,85]. The amount of Cr 2 N precipitation increases with the rise of annealing temperature.…”

Section: Precipitation Of Other Phasesmentioning

confidence: 99%

“…As such, weld thermal cycles are selected to ensure rapid cooling of the weld metal and the adjacent Heat-Affected Zone (HAZ), thereby preventing the formation of deleterious phases, which can adversely affect the corrosion properties [28,29]. Consumables should be selected to ensure the proportion of 5% to 10% delta ferrite in the welded microstructure, which is primordial to inhibit solidification cracking.…”

Section: Introductionmentioning

confidence: 99%

Effects of Heat Input on Microstructure, Corrosion and Mechanical Characteristics of Welded Austenitic and Duplex Stainless Steels: A Review

Mohammed

Ishak

Aqida

et al. 2017

Metals

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Abstract:The effects of input heat of different welding processes on the microstructure, corrosion, and mechanical characteristics of welded duplex stainless steel (DSS) are reviewed. Austenitic stainless steel (ASS) is welded using low-heat inputs. However, owing to differences in the physical metallurgy between ASS and DSS, low-heat inputs should be avoided for DSS. This review highlights the differences in solidification mode and transformation characteristics between ASS and DSS with regard to the heat input in welding processes. Specifically, many studies about the effects of heat energy input in welding process on the pitting corrosion, intergranular stress, stress-corrosion cracking, and mechanical properties of weldments of DSS are reviewed.

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“…Urena et al 6 reported welding of 3-mm-thick rolled sheets of 2005 commercial DSS using PAW. They found that the optimum heat input was between 2.5 and 3.2 kJ/cm using keyhole mode 7 .…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Corrosion Properties of a Duplex Steel Welded using Micro-Arc or Laser

Lima¹,

Carvalho

Teleginski

et al. 2015

Mat. Res.

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Duplex stainless steels have been extensively used in parts that are subject to corrosive environments and that have high mechanical strength requirements. Welding usually distorts the well-balanced austenite-ferrite ratio, and can produce brittle intermetallic phases; therefore, post-welding heat treatments are usually required. For applications where post-welding treatments are not possible, low heat input methods, such as micro-tungsten inert gas welding (TIG) and laser beam welding (LBW), can be used. The present investigation analyzed the microstructure, mechanical, and corrosion properties of 2507-classduplex steel tubes after welding. The microstructures of the heat-affected zones and the fusion zones contained variable amounts of ferrite and austenite. In the heat-affected and fusion zones in the TIG samples, the microstructures were primarily composed of ferrite grains with allotriomorphic austenite at the grain boundaries, intragranular Widmanstätten needles and plate-like precipitates. The LBW samples showed much finer microstructures, which contained austenite in the grain boundaries and fine austenite precipitates in the ferrite grains. Deleterious intermetallic phases, such as σ-phases, were not observed using X-ray diffraction. The tensile strength properties were very similar for the TIG and LBWsamples, reaching tensile strengths of approximately 840 MPa and total elongations between 61 and 87%. The heat-affected zone of the TIG welds were particularly susceptible to corrosion (0.05 mm/year) compared to the base metal (0.007 mm/year) and the laser welds (0.01 mm/year). Therefore, laser welding is a promising technique for the welding of 2507-class duplex tubes.

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Weldability of a 2205 duplex stainless steel using plasma arc welding

Cited by 97 publications

References 10 publications

Microstructural behavior of SAF 2205 Duplex Stainless Steel Welded by Friction Hydro Pillar Processing

Microstructural behavior of SAF 2205 Duplex Stainless Steel Welded by Friction Hydro Pillar Processing

Effects of Heat Input on Microstructure, Corrosion and Mechanical Characteristics of Welded Austenitic and Duplex Stainless Steels: A Review

Mechanical and Corrosion Properties of a Duplex Steel Welded using Micro-Arc or Laser

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