Journal ArticleDOI
Gas tungsten arc and laser beam welding processes effects on duplex stainless steel 2205 properties
TLDR
A comparative study on the influence of gas tungsten arc welding (GTAW) and carbon dioxide laser beam welding (LBW) processes on the size and microstructure of fusion zone FZ then, on the mechanical and corrosion properties of duplex stainless steel DSS grade 2205 plates of 6.4mm thickness was investigated as mentioned in this paper.Abstract:
A comparative study on the influence of gas tungsten arc welding (GTAW) and carbon dioxide laser beam welding (LBW) processes on the size and microstructure of fusion zone FZ then, on the mechanical and corrosion properties of duplex stainless steel DSS grade 2205 plates of 6.4 mm thickness was investigated. Autogenous butt welded joints were made using both GTAW and LBW. The GTA welded joint was made using well established welding parameters (i.e., current ampere of 110 A, voltage of 12 V, welding speed of 0.15 m/min and argon shielding rate of 15 l/min). While optimum LBW parameters were used (i.e., welding speed of 0.5 m/min, defocusing distance of 0.0 mm, argon shielding flow rate of 20 l/min and maximum output laser power of 8 kW). The results achieved in this investigation disclose that welding process play an important role in obtaining satisfactory weld properties. In comparison with GTAW, LBW has produced welded joint with a significant decrease in FZ size and acceptable weld profile. The ferrite–austenite balance of both weld metal WM and heat affected zone (HAZ) are influenced by heat input which is a function of welding process. In comparison with LBW, GTAW has resulted in ferrite–austenite balance close to that of base metal BM due to higher heat input in GTAW. However, properties of LB welded joint, particularly corrosion resistance are much better than that of GTA welded joint. The measured corrosion rates for LBW and GTAW joints are 0.05334 mm/year and 0.2456 mm/year, respectively. This is related to the relatively small size of both WM and HAZ produced in the case of LBW. In other words, properties of welded joints are remarkably influenced by FZ size rather than the produced austenite–ferrite balance.read more
Citations
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Journal ArticleDOI
Effect of welding processes and conditions on the microstructure, mechanical properties and corrosion resistance of duplex stainless steel weldments—A review
TL;DR: In this article, the effect of welding processes and conditions on microstructure, mechanical properties and corrosion resistance of duplex stainless steels and its various combinations on the basis of structure-property co-relationship are systematically highlighted.
Journal ArticleDOI
Duplex stainless steel fabricated by selective laser melting - Microstructural and mechanical properties
Florian Hengsbach,Peter Koppa,Kristina Duschik,Martin Holzweissig,Madison Burns,Jens Nellesen,Wolfgang Tillmann,Thomas Tröster,Kay-Peter Hoyer,Mirko Schaper +9 more
TL;DR: In this paper, microstructural and mechanical characterizations of duplex stainless steel UNS S31803 processed by selective laser melting (SLM) are conducted to shed light on the phase arrangement evolving in the as-built condition and in several heat-treated conditions.
Journal ArticleDOI
Weldability, machinability and surfacing of commercial duplex stainless steel AISI2205 for marine applications – A recent review
TL;DR: In this article, a review of metallurgical, mechanical, and corrosion properties of commercial marine alloy duplex stainless steel AISI 2205 with special reference to its weldability, machinability, and surfacing is presented.
Journal ArticleDOI
Novel ferritic stainless steel formed by laser melting from duplex stainless steel powder with advanced mechanical properties and high ductility
TL;DR: In this article, a unique mosaic-type structure with mosaics of 100-150-µm size was formed after laser melting of duplex 2507SAF steel powder, and a great number of entangled dislocation loops resembling a loops with 100-200-nm size were also formed inside each of these mosaics and also within recrystallized micron size grains at the mosaic boundary zones.
Journal ArticleDOI
Effects of Heat Input on Microstructure, Corrosion and Mechanical Characteristics of Welded Austenitic and Duplex Stainless Steels: A Review
TL;DR: In this paper, the effects of input heat of different welding processes on the microstructure, corrosion, and mechanical characteristics of welded duplex stainless steel (DSS) are reviewed.
References
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Journal ArticleDOI
Effect of laser welding parameters on fusion zone shape and solidification structure of austenitic stainless steels
TL;DR: In this paper, a carbon dioxide laser with a maximum output of 5 kW in the continuous wave mode was used to make bead-on-plate and autogenous butt weld joints.
Journal ArticleDOI
Effect of nitrogen on corrosion behavior of 28Cr–7Ni duplex and microduplex stainless steels in air-saturated 3.5 wt% NaCl solution
TL;DR: In this article, the corrosion behavior of 28Cr−7Ni−O−034N duplex stainless steels in air-saturated 35-wt% NaCl solution at pH 2, 7, 10 and 27 °C was studied by the potentiodynamic method.
Journal ArticleDOI
Decomposition of ferrite to austenite in 26%Cr-5%Ni stainless steel
TL;DR: In this article, the decomposition of ∆-ferrite to austenite has been studied in a 26%Cr-5%Ni stainless steel, and it was shown by STEM microanalysis that Ni partitions to the Austenite and Cr partitions to ferrit.
Journal ArticleDOI
Microstructure and corrosion behavior of shielded metal arc-welded dissimilar joints comprising duplex stainless steel and low alloy steel
TL;DR: In this paper, the results of an investigation on a dissimilar weld joint comprising a boiler-grade low alloy steel and duplex stainless steel (DSS) were examined for their microstructural features and properties.
Journal Article
Heat-affected zone liquation cracking in austenitic and duplex stainless steels : segregation-based grain boundary liquation models are incorporated into a mechanistic explanation of HAZ liquation cracking
TL;DR: In this paper, a spot Varestraint test was used to evaluate the cracking susceptibility of several commercial austenitic and duplex stainless steels, including Ferralium 255 and Alloy 2205, to the heat-affected zone (HAZ) liquation cracking susceptibility.
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