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
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Evolution of Metallurgical Phases and Its Co-relation with Mechanical Properties and Corrosion Resistance of 22Cr–5Ni–3Mo and 16Cr–10Ni–2Mo Dissimilar Weldments
TL;DR: In this article, the microstructural evolution and correlated with mechanical and corrosion resistance of the weldment was investigated by using an optical microscope and scanning electron microscopy, and the electrochemical assessments were carried out including modified double-loop electrochemical potentiodynamic reactivation test and modified tensile test.
Journal ArticleDOI
Microstructural and Mechanical Characteristics of Cold Metal Transfer Weld Joints of UNS S32750
D. Arun,K. Devendranath Ramkumar +1 more
TL;DR: The 3mm-thick plate joints of the UNS S32750 were successfully established using cold transfer welding (CMT) technology with Inox 2509 MoW B as filler as mentioned in this paper.
Journal ArticleDOI
Failure analysis and the cold crack formation mechanism for the QP1180 steel welded joint
TL;DR: In this paper, the formation of Widmanstatten ferrite (WF) in weld metal and its effect on the cold crack generation for QP1180 welded joint was systematically discussed.
Journal ArticleDOI
Possibilities to Use Physical Simulations When Studying the Distribution of Residual Stresses in the HAZ of Duplex Steels Welds
TL;DR: In this paper, the effect of temperature cycles on residual stresses in the heat-affected zone (HAZ) was investigated in a thermal-mechanical simulator Gleeble 3500.
Journal ArticleDOI
Nondestructive Microstructural Characterization of Austenitic-Ferritic Stainless Steel Welded Joints by Double Loop Electrochemical Polarization Reactivation Portable Test
Brígida Bastos de Almeida,Andreia de Souza Martins Cardoso,Pedro Soucasaux Pires Garcia,Hugo Ribeiro da Igreja,R. Chales,L.F. Noris,Juan Manuel Pardal,Sérgio Souto Maior Tavares,Eduardo A. Ponzio +8 more
TL;DR: In this paper , a portable Double Loop Electrochemical Polarization Reactivation (DL-EPR) was used to evaluate the precipitation of deleterious phase's in welded thermal aged joints by using a preliminary metallographic replica characterization.
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.