scispace - formally typeset
Search or ask a question
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
More filters
Journal ArticleDOI
TL;DR: In this article, the effects of the annealing temperature on the microstructure and the corrosion behavior of duplex stainless steel 2507 were investigated by means of magnetic force microscopy (MFM), scanning Kelvin probe force microscope (SKPFM), and scanning electron microscopy.

86 citations

Journal ArticleDOI
TL;DR: In this article, single beads and samples with ten layers were successfully deposited on a 316-L stainless steel surface under optimized conditions using a 4000-W continuous wave fibre laser and an arc welding machine.

86 citations

Journal ArticleDOI
TL;DR: In this paper, the authors examined duplex stainless steel coupons in solution-annealed condition and found that sulfate reduction by bacterial species results in the production of H2S, which can significantly influence the anodic and cathodic processes.

84 citations

Journal ArticleDOI
TL;DR: In this article, the corrosion behavior of a friction stir welded lean duplex stainless steel was investigated in H 2 SO 4 solution, and it was demonstrated that increasing the welding speed decreased the grain size of the α and γ phases and improved the corrosion resistance of the stir zone.

81 citations

Journal ArticleDOI
Yanze Yang1, Zhiyu Wang, Hua Tan1, Jufeng Hong1, Yiming Jiang1, Laizhu Jiang, Jin Li1 
TL;DR: In this paper, the effect of laser-beam welding and subsequent short-time post-weld heat treatment at different temperatures and holding time on microstructure evolution and pitting corrosion behavior of UNS S31803 duplex stainless steel was investigated.

79 citations

References
More filters
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