Journal ArticleDOI
Effect of weld metal chemistry and heat input on the structure and properties of duplex stainless steel welds
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
Effect of Heat Input on Microstructure and Corrosion Behavior of Duplex Stainless Steel Shielded Metal Arc Welds
TL;DR: In this paper, UNS S32750 super duplex stainless steel sheets were welded by shielded metal arc welding process with E2595 electrode using two different heat inputs, 0.54 and 1.10 kJ/mm.
Journal ArticleDOI
Effect of multipass TIG welding on the corrosion resistance and microstructure of a super duplex stainless steel
TL;DR: In this paper, the effect of repetitive TIG welding passes, melting and remelting the same material volume on microstructure and corrosion resistance of 2507 (EN 1.4410) su
Journal ArticleDOI
Failure analysis of duplex stainless steel weld used in flexible pipes in off shore oil production
Sérgio Souto Maior Tavares,Cherlio Scandian,Juan Manuel Pardal,Temístocles de Sousa Luz,F.J. da Silva +4 more
Journal ArticleDOI
Assessment of Mechanical Properties of AISI 4140 and AISI 316 Dissimilar Weldments
Madduru Phanindra Reddy,A. Aldrin Sam William,M. Mohan Prashanth,S.N. Sabaresh Kumar,K. Devendranath Ramkumar,N. Arivazhagan,S. Narayanan +6 more
TL;DR: In this article, an attempt has been made to investigate the weldability of AISI 4140 and 316 by Gas Tungsten Arc Welding (GTAW) process with and without filler metal.
Journal ArticleDOI
Effect of alternating voltage passivation on the corrosion resistance of duplex stainless steel
Huan He,Tao Zhang,Tao Zhang,Chengzhi Zhao,Kai Hou,Guozhe Meng,Guozhe Meng,Yawei Shao,Yawei Shao,Fuhui Wang,Fuhui Wang +10 more
TL;DR: In this article, the effects of alternating voltage (AV) passivation on the corrosion resistance of duplex stainless steel (DSS) SEM, EDS and XPS were employed to further investigate the influence of AV passivation in the properties of the passive film.
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.