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
Evaluation of Microstructure and Mechanical Properties in Dissimilar Austenitic/Super Duplex Stainless Steel Joint
TL;DR: In this paper, the effect of chemical composition on microstructural features and mechanical properties of dissimilar joints between super duplex and austenitic stainless steels, welding was attempted by gas tungsten arc welding process with a super- duplex (ER2594) and an austenite (ER309LMo) stainless steel filler metal.
Journal ArticleDOI
Influence of Heat Input in Pulsed Current GTAW Process on Microstructure and Corrosion Resistance of Duplex Stainless Steel Welds
TL;DR: In this article, the effect of heat input variations on the microstructure and corrosion resistance of a duplex stainless steel (DSS) in artificial sea water media were studied, and it was found that the presence of sigma phase and Cr2 N decreases the corrosion potential.
Journal ArticleDOI
Effect of shielding gases on mechanical and metallurgical properties of duplex stainless-steel welds
TL;DR: In this article, the authors used a standard 2205 (UNS S31803) DSS sheet of 5 mm thickness, with 22.37% Cr and 5.74% Ni, with Zeron-100 super DSS filler wire with higher alloy content.
Journal ArticleDOI
Metallurgical and mechanical characterization of dissimilar welds of austenitic stainless steel and super-duplex stainless steel – A comparative study
K. Devendranath Ramkumar,Anshuman Singh,Shubham Raghuvanshi,Ankur Bajpai,Tathagat Solanki,M. Arivarasu,N. Arivazhagan,S. Narayanan +7 more
TL;DR: In this article, the joining of dissimilar combinations of austenitic stainless steel, AISI 316L and super-duplex stainless steel (UNS S32750) by continuous current (CC) and pulsed current (PC) gas tungsten arc welding (GTAW) using ER2553 and ERNiCrMo-3 fillers was examined using both optical and scanning electron microscopy (SEM) techniques.
Journal ArticleDOI
Effect of welding speed on microstructures, mechanical properties and corrosion behavior of GTA-welded AISI 201 stainless steel sheets
TL;DR: In this article, three welding speeds designated as low (1.5mm/s), medium (2.5 mm/s) and high (3.5 millimeters/sec) were operated during gas tungsten arc welding (GTAW) process and joints made were subjected to analysis of the microstructures, mechanical and corrosion properties of the joints.
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.