Journal ArticleDOI
Effect of weld metal chemistry and heat input on the structure and properties of duplex stainless steel welds
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TLDR
In this article, a low heat input process viz., EBW and another commonly employed process, gas tungsten-arc welding have been employed for welding of duplex stainless steels with and without nickel enhancement.Abstract:
The excellent combination of strength and corrosion resistance in duplex stainless steels (DSS) is due to their strict composition control and microstructural balance. The ferrite–austenite ratio is often upset in DSS weld metals owing to the rapid cooling rates associated with welding. To achieve the desired ferrite–austenite balance and hence properties, either the weld metal composition and/or the heat input is controlled. In the current work, a low heat input process viz., EBW and another commonly employed process, gas tungsten-arc welding have been employed for welding of DSS with and without nickel enhancement. Results show that (i) chemical composition has got a greater influence on the ferrite–austenite ratio than the cooling rate, (ii) and even EBW which is considered an immature process in welding of DSS, can be employed provided means of filler addition could be devised.read more
Citations
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Journal ArticleDOI
Influence of Cold Plastic Deformation in the Hardness and Corrosion Resistance of Superduplex Stainless Steels Aged at 475 °C
Juan Manuel Pardal,Sérgio Souto Maior Tavares,Maria Cindra Fonseca,João Vitor Silva Matias,Eduardo A. Ponzio,Marcelo Camargo Severo de Macêdo +5 more
TL;DR: In this article, the influence of prior cold plastic deformation on hardness and corrosion resistance of superduplex stainless steels (SDSS) was determined after thermal aging at 475 °C.
Journal ArticleDOI
DL-EPR vs. LSV-KOH: from simple detection of deleterious phases to analysis of morphology and high accuracy on determination of sigma phase in UNS S32750 stainless steel
Journal ArticleDOI
Effects of Robotic CO2 Arc Welding Variables on Penetration and Microstructure of Weld in C-80 Grade Steel
TL;DR: In this paper, the effect of process variables on penetration and microstructure of C-80 steel joints produced by robotic CO2 arc welding was studied in different samples were produced by employing arc voltages of 23, 25 and 27 V, welding currents of 100, 110 and 120 A and welding speeds of 42, 62 and 82 cm/min.
Book ChapterDOI
Study on Properties of LBW Joint of AISI 304 Pipes Used in Nuclear Power Plant
TL;DR: In this paper, a girth weld of AISI 304 stainless steel pipes with a dimension of Φ89 mm × 250 mm × 14.5 mm was produced by laser beam welding.
References
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Book
Duplex stainless steels : microstructure, properties and applications
TL;DR: In this paper, the authors present a non-destructive testing of welds for service experience, based on the application of service experience in metallurgy and metallurgical applications.