Effect of Plastic Deformation On the Corrosion of Iron and Steel

Greene, N. D.; Saltzman, G. A.

doi:10.5006/0010-9312-20.9.293t

Cited by 71 publications

(30 citation statements)

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“…The deformation process causes the modification of the microstructure: after cold working, the occurrence of residual stress and the formation of the Strain-Induced Martensite (SIM) from the metastable austenite can substantially affect the pitting resistance of duplex stainless steels, because the number of the active anodic sites on the surface increases [46,47]. Thickness, composition, and uniformity of the passive layer are modified in different extent by plastic deformation [48,49] and the increasing in dislocation density favors the film dissolution due to the presence of lower binding energy regions, compared to a perfect crystal [50]. This may affect the formation of a less effective passive film on the steel surface; moreover, the presence of distorted high-energy interfaces may provide further trigger points for the localized attack [51,52].…”

Section: Corrosion Pitting Temperature (Cpt)mentioning

confidence: 99%

Microstructural and Corrosion Properties of Cold Rolled Laser Welded UNS S32750 Duplex Stainless Steel

Gennari

Lago

Bögre

et al. 2018

Metals

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The main goal of this work was to study the effect of plastic deformation on weldability of duplex stainless steel (DSS). It is well known that plastic deformation prior to thermal cycles can enhance secondary phase precipitation in DSS which can lead to significant change of the ferrite-austenite phase ratio. From this point of view one of the most important phase transformation in DSS is the eutectoid decomposition of ferrite. Duplex stainless steels (DSSs) are a category of stainless steels which are employed in all kinds of applications where high strength and excellent corrosion resistance are both required. This favorable combination of properties is provided by their biphasic microstructure, consisting of ferrite and austenite in approximately equal volume fractions. Nevertheless, these materials may suffer from several microstructural transformations if they undergo heat treatments, welding processes or thermal cycles. These transformations modify the balanced phase ratio, compromising the corrosion and mechanical properties of the material. In this paper, the microstructural stability as a consequence of heat history due to welding processes has been investigated for a super duplex stainless steel (SDSS) UNS S32750. During this work, the effects of laser beam welding on cold rolled UNS S32750 SDSS have been investigated. Samples have been cold rolled at different thickness reduction (ε = 9.6%, 21.1%, 29.6%, 39.4%, 49.5%, and 60.3%) and then welded using Nd:YAG laser. Optical and electronical microscopy, eddy’s current tests, microhardness tests, and critical pitting temperature tests have been performed on the welded samples to analyze the microstructure, ferrite content, hardness, and corrosion resistance. Results show that laser welded joints had a strongly unbalanced microstructure, mostly consisting of ferritic phase (~60%). Ferrite content decreases with increasing distance from the middle of the joint. The heat-affected zone (HAZ) was almost undetectable and no defects or secondary phases have been observed. Both hardness and corrosion susceptibility of the joints increase. Plastic deformation had no effects on microstructure, hardness or corrosion resistance of the joints, but resulted in higher hardness of the base material. Cold rolling process instead, influences the corrosion resistance of the base material.

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Section: Corrosion Pitting Temperature (Cpt)mentioning

confidence: 99%

Microstructural and Corrosion Properties of Cold Rolled Laser Welded UNS S32750 Duplex Stainless Steel

Gennari

Lago

Bögre

et al. 2018

Metals

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“…Past investigations on cold working of pure Fe with subsequent annealing have been found to impact the grain size evolution [17], corrosion rate in acidic media [18,19] and mechanical properties [20]. Nevertheless, the effect of BD on microstructural changes, mechanical properties and degradation behaviours of pure Fe was not thoroughly addressed in previous studies particularly in relation to crystallographic texture [12] and recrystallization behaviour [21].…”

Section: Introductionmentioning

confidence: 96%

Influence of cross-rolling on the micro-texture and biodegradation of pure iron as biodegradable material for medical implants

et al. 2015

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“…Literature review indicates that numerous previous work was devoted to understanding the effect of plastic deformation on the corrosion resistance of aluminum alloys, copper, and steels . Nevertheless, most of the work focused mainly on the influence of deformation at macroscopic scale, with little attention paid to the effect of LPD on corrosion mechanism.…”

Section: Introductionmentioning

confidence: 99%

Correlation between localized plastic deformation and localized corrosion in AA2099 aluminum‐lithium alloy

Huang

Zhou

et al. 2015

Surface & Interface Analysis

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Localized corrosion in an AA2099-T83 aluminum-lithium alloy has been correlated with localized plastic deformation (LPD) introduced by cold working. The high population density of dislocations in the slip bands associated with LPD promoted preferential precipitation of needle-shaped T 1 (Al 2 CuLi) phase during artificial aging. Consequently, preferential attack of the electrochemically active T 1 phase in corrosive environment resulted in selective corrosion of the bands, leading to the development of the characteristic morphology of narrow, parallel volume of corrosion.

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Effect of Plastic Deformation On the Corrosion of Iron and Steel

Cited by 71 publications

References 0 publications

Microstructural and Corrosion Properties of Cold Rolled Laser Welded UNS S32750 Duplex Stainless Steel

Microstructural and Corrosion Properties of Cold Rolled Laser Welded UNS S32750 Duplex Stainless Steel

Influence of cross-rolling on the micro-texture and biodegradation of pure iron as biodegradable material for medical implants

Correlation between localized plastic deformation and localized corrosion in AA2099 aluminum‐lithium alloy

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