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Journal ArticleDOI

Effect of weld metal chemistry and heat input on the structure and properties of duplex stainless steel welds

TL;DR: 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.
Citations
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Journal ArticleDOI
TL;DR: In this article, the effects of short-time heat treatment at different temperatures on the microstructure evolution and pitting corrosion behavior of UNS S32750 super duplex stainless steel welds were investigated.

43 citations

Journal ArticleDOI
TL;DR: In this article, the microstructures and microhardness at fusion boundary of a weld joint were investigated in a 316 stainless steel/Inconel 182 dissimilar weldment, and the results showed that there were two alternately distributed typical fusion boundaries, a narrow random boundary with a clear sharp interface and an epitaxial fusion one with (100) BM //(100) WM at the joint interface.

43 citations

Journal ArticleDOI
TL;DR: In this article, the influence of cavitation on the corrosion resistance of EN 1.4462, its filler metal, and the welded metal obtained by GTAW was investigated by potentiodynamic curves in LiBr heavy brine solution under static and dynamic conditions at 25 °C.

43 citations

Journal ArticleDOI
TL;DR: In this paper, the resistance to localised corrosion of AISI 2205 duplex stainless steel plates joined by Gas Metal Arc Welding (GMAW) under the effect of electromagnetic interaction of low intensity (EMILI) was evaluated with sensitive electrochemical methods.

43 citations

Journal ArticleDOI
TL;DR: The microstructure and property of a 2101 duplex stainless steel (DSS) with composition 21.4Cr 6Mn 1.5Ni 0.24N 0.6Mo was investigated as mentioned in this paper.
Abstract: The microstructure and property of a 2101 duplex stainless steel (DSS) with composition 21.4Cr–6Mn–1.5Ni–0.24N–0.6Mo was investigated. The results show that yield stress of 2101 reaches 490 MPa, being 2.5 times of AISI 304 austenitic stainless steel. Impact energy of 2101 at 20 °C is as high as 200 J along rolling direction and declines with the decrease of temperature. Meantime, impact energy along transverse–longitudinal direction is 80–90 J lower than the values along rolling orientation. Ferric chloride corrosion test shows that rate of corrosion of 2101 and AISI 304 are 2.67 g/m2 × h and 4.61 g/m2 × h, respectively. Critical pitting temperature of 2101 is determined to be about 20 °C, being obviously higher than 4.6 °C of AISI 304. These indicate that 2101 has better pitting corrosion resistance than AISI 304.

42 citations

References
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Book
01 Jan 1997
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.
Abstract: Developments, grades and specifications Alloy design Microstructure Forming and machining Physical and mechanical properties Corrosion Stress corrosion cracking Welding metallurgy Welding processes Weld properties Non-destructive testing of welds Applications Service experience.

449 citations