Journal ArticleDOI
Influence of Silicon on the Intergranular Corrosion Behavior of 18Cr-8Ni Stainless Steels
TLDR
In this paper, the authors developed a stainless steel with superior resistance to intergranular stress corrosion cracking (IGSCC), intergranul corrosion (IGC), and pitting corrosion.Abstract:
As a part of a study to develop a stainless steel (SS) with superior resistance to intergranular stress corrosion cracking (IGSCC), intergranular corrosion (IGC), and pitting corrosion, an...read more
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Recent developments in stainless steels
Abstract: This article presents an overview of the developments in stainless steels made since the 1990s. Some of the new applications that involve the use of stainless steel are also introduced. A brief introduction to the various classes of stainless steels, their precipitate phases and the status quo of their production around the globe is given first. The advances in a variety of subject areas that have been made recently will then be presented. These recent advances include (1) new findings on the various precipitate phases (the new J phase, new orientation relationships, new phase diagram for the Fe–Cr system, etc.); (2) new suggestions for the prevention/mitigation of the different problems and new methods for their detection/measurement and (3) new techniques for surface/bulk property enhancement (such as laser shot peening, grain boundary engineering and grain refinement). Recent developments in topics like phase prediction, stacking fault energy, superplasticity, metadynamic recrystallisation and the calculation of mechanical properties are introduced, too. In the end of this article, several new applications that involve the use of stainless steels are presented. Some of these are the use of austenitic stainless steels for signature authentication (magnetic recording), the utilisation of the cryogenic magnetic transition of the sigma phase for hot spot detection (the Sigmaplugs), the new Pt-enhanced radiopaque stainless steel (PERSS) coronary stents and stainless steel stents that may be used for magnetic drug targeting. Besides recent developments in conventional stainless steels, those in the high-nitrogen, low-Ni (or Ni-free) varieties are also introduced. These recent developments include new methods for attaining very high nitrogen contents, new guidelines for alloy design, the merits/demerits associated with high nitrogen contents, etc.
Journal ArticleDOI
Correlation between composition of passive layer and corrosion behavior of high Si-containing austenitic stainless steels in nitric acid
R. Robin,F. Miserque,V. Spagnol +2 more
TL;DR: In this paper, the role of silicon on the corrosion behavior of two different stainless steels with equivalent chromium content but with different silicon content (304L steel and Uranus S1N) has been studied in concentrated nitric acid solutions.
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The effect of delta-ferrite content on the stress corrosion cracking of austenitic stainless steels in a sulphate solution*
G. Sui,E.A. Charles,J. Congleton +2 more
TL;DR: In this paper, the susceptibility to stress corrosion cracking of a CF3 cast austenitic stainless steel, heat treated to generate a range of delta-ferrite contents, and weld metal that contained either 0 or 6% delta ferrite has been assessed in a buffered, sulphate environment at 250°C using slow strain rate and constant displacement tests under open circuit conditions and at various applied electrode potentials.
Journal ArticleDOI
The kinetics of transpassive dissolution chemistry of stainless steels in nitric acid: The impact of Si
Barbara Laurent,Barbara Laurent,Nathalie Gruet,Benoit Gwinner,Frédéric Miserque,Karine Rousseau,Kevin Ogle +6 more
TL;DR: In this article, the elemental dissolution of two stainless steels during transpassive polarization was monitored using atomic emission spectroelectrochemistry (AES) and energy dispersive spectroscopy (EPS).
Journal ArticleDOI
Effects of alloying additions on the spontaneous passivation of stainless steels containing copper at different temperatures
A.A. Hermas,Kotaro Ogura +1 more
TL;DR: In this article, the authors investigated the spontaneous passivation of stainless steels with P impurity at different temperatures by electrochemical and surface analysis (XRD, SEM, STM and AES) techniques.