Journal ArticleDOI
Effect of weld metal chemistry and heat input on the structure and properties of duplex stainless steel welds
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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
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Journal ArticleDOI
Correction of Phase Balance on Nd:YAG Pulsed Laser Welded UNS S32750 Using Cobalt Electroplating Technique
Eli Jorge da Cruz Junior,Bruna Berbel Seloto,Vicente Afonso Ventrella,Francisco Mateus Faria de Almeida Varasquim,Andrea Zambon,Irene Calliari,Claudio Gennari,Alessio Giorgio Settimi +7 more
TL;DR: In this paper , the authors investigated the influence of cobalt addition in the joining process by preliminary electroplating on UNS S32750 SDSS Nd: YAG pulsed laser welding, specifically regarding microstructure and microhardness.
Journal ArticleDOI
Tribological Characterization of Ni-Free Duplex Stainless Steel Alloys Using the Taguchi Methodology
TL;DR: In this paper, the effect of operating factors such as sliding speed and applied load on the wear behavior of different compositions of nickel-free DSSs was investigated, and it was observed that the composition had a higher contribution of 33.66% to the wear rate (WR) and the contribution of the sliding speed to the coefficient of friction (COF) was found to be 68.17%.
Journal ArticleDOI
Influência dos Gases de Proteção na Soldagem do Aço UNS S31803 com Arame E2209-T1/4 pelo Processo FCAW
Miguel Luiz Ribeiro Ferreira,Claudio Alberto Fortes da Silva,Juan Manuel Pardal,Sérgio Souto Maior Tavares +3 more
TL;DR: In this article, a trabalho avalia a influencia of adicoes entre 10 e 25% of CO2 como gases de protecao a base of argonio (Ar) nas propriedades mecânicas and resistencia a corrosao de juntas soldadas pelo processo FCAW no aco inoxidavel duplex (AID) UNS S31803 fazendo uso de arame eletrodo E2209T1-4.
Journal ArticleDOI
Effects of Keyhole Tungsten Inert Gas Welding Parameters on 2205 Duplex Stainless Steel Welded Joints
TL;DR: In this paper, a keyhole gas tungsten arc (K-TIG) welding technique was applied to weld 2205 duplex stainless steel (DSS) with a thickness of 8 mm.
Using Duplex Stainless Steel to Join X65 Pipe Internally Clad with Alloy 625 for Subsea Applications
TL;DR: In this article, the authors present a Table of Table of Contents and acknowledgments for the work presented in this article............................................................................................................................... ii Acknowledgments.............................................................................................................. vi Vita................................................................................................................................... viii Table of
References
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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.