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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Comparative studies on GTA and PCGTA weldments of AISI 4140 and AISI 316 dissimilar metals
Madduru Phanindra Reddy,M. Mohan Prashanth,A. Aldrin Sam William,M. Arivarasu,K. Devendranath Ramkumar,N. Arivazhagan,S. Narayanan +6 more
TL;DR: In this article, an attempt has been made to investigate the weldability, mechanical properties of dissimilar weldments of AISI 4140 and AisI 316 using gas tungsten arc welding (GTAW) and Pulsed Current GTAW employing ER309L filler wire.
Análise da Resistência à Corrosão por Pite em Soldas de Reparo pelo Processo TIG em Aço Inoxidável Superduplex UNS S32750 (Analysis of Pitting Corrosion Resistance in Welding Repair by GTAW Procedure in a Superduplex Stainless Steel UNS S32750)
Juliana Primo,Basílio de Souza,Alexandre de Gouvêa Arias,Juan Manuel Pardal,Fernando B. Mainier,Miguel Luiz,Ribeiro Ferreira,Sérgio Souto,Maior Tavares +8 more
TL;DR: In this paper, a simulation of welding repair by GTAW process was performed in a superduplex stainless steels (SDSS) UNS S32750 and the results obtained allowed the determination of welding procedures and recommendations useful to the welding repair of SDSS.
Journal ArticleDOI
Effect of External Electromagnetic Fields on the Corrosion Fatigue of Welded Joints of 2205 Duplex Stainless Steel
TL;DR: In this article, the microstructural characterization and assessment of localized corrosion resistance in terms of pitting corrosion was also evaluated for the low-cycle conditions of corrosion fatigue tests with an aim to observe the behavior of short cracks.
Journal ArticleDOI
Joint-design effect on the metallurgical and mechanical behavior of duplex stainless steel welds
TL;DR: In this paper , the influence of joint design on the microstructure and the mechanical properties of SAF 2205 duplex stainless steel welds is investigated, and the weldments were investigated for microstructural characterization, ferrite content, and microhardness study.
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.