Effect of post-GBE strain-sensitisation on corrosion resistance of grain boundary engineered 304 austenitic stainless steel

Yamada, G.; Kokawa, Hiroyuki; Yu, Yang; Tokita, Shun; Yokoyama, Takashi; Sato, Yutaka; Fujii, Hisashi; Tsurekawa, Sadahiro

doi:10.1080/14786435.2012.762467

Cited by 18 publications

(4 citation statements)

References 33 publications

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“…At a low strain rate of 0.005 s Ϫ1 , the values of Ra for the specimens deformed at 1,050 and 1,150°C were higher than for other deformation temperatures, having a higher degree of sensitivity to IGC. That susceptibility can be attributed to the formation of more ␥/␥ grain boundaries and ␦/␥ phase boundaries at the deformation temperatures, leading to the decrease in resistance to IGC (Yamada et al, 2013). This was consistent with the result of flow curve behavior and microstructural analyses.…”

Section: Intergranular Corrosion Susceptibility Analysissupporting

confidence: 88%

Effect of high temperature compression deformation strain rate on the microstructure and corrosion behavior of 2205 duplex stainless steel

Yang

Yan

2015

Anti-Corrosion Methods and Materials

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Purpose -The aim of this paper was to investigate the effect of strain rate on microstructure and corrosion behavior of 2205 duplex stainless steel, after high-temperature compression tests. Design/methodology/approach -The specimens were prepared using a Gleeble3800 thermo-simulation machine over a range of temperatures from 850 to 1,250°C and strain rates from 0.005 to 5 s Ϫ1 , and the corresponding flow curves and deformation microstructure obtained were further analyzed. To evaluate the effect of strain rate on corrosion behavior, potentiodynamic polarization tests and double-loop electrochemical potentiodynamic reactivation (DL-EPR) were used to characterize the electrochemical performance. Findings -Compared with strain rate of 0.5 s Ϫ1 , the worst corrosion resistance behavior from the potentiodynamic polarization test results after deformation at 0.005 s Ϫ1 was attributed to more austenite (␥) and ferrite (␦) grain boundaries or ␦/␥ phase interface formation due to the better effect of ␥ dynamic recrystallization (DRX) or ␦ dynamic recovery (DRV). Increasing strain rate to 5 s Ϫ1 lowered the corrosion resistance, due to the increase in dislocation density. At the low strain rate of 0.005 s Ϫ1 , the susceptibility to intergranular corrosion (IGC) was comparatively high after deformation at 1050 and 1150°C with more ␥/␥ grains and ␦/␥ phase boundary formation, which was lowered with the strain rate increase to 0.5 s Ϫ1 , due to suppressing effect of ␥ DRX. Originality/value -The paper provides the scientific basis for the practical application of hot working of 2205 duplex stainless steel.

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Section: Intergranular Corrosion Susceptibility Analysissupporting

confidence: 88%

Effect of high temperature compression deformation strain rate on the microstructure and corrosion behavior of 2205 duplex stainless steel

Yang

Yan

2015

Anti-Corrosion Methods and Materials

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“…The 304BM was thermomechanically GBE processed by single step prestrain plus annealing to control the grain boundary character distribution, under the conditions optimised in our previous study. 20 Specimens were deformed by cold rolling, resulting in a 3% reduction of thickness. These deformed specimens were annealed at 1220 K for 72 h and subsequently quenched in cold water.…”

Section: Methodsmentioning

confidence: 99%

“…22 In this study, the grain boundaries with low S value (S<29) were classified as CSL boundaries and Brandon's criterion 23 was adopted to define the critical deviation from the exact CSL orientation relationship, because CSL boundaries defined by these criteria could explain experimental results in our previous GBE studies, to significant extent, such as weld decay resistance, 13 percolation probabilities 29 and effects of strain sensitisation. 20 The frequency of CSL boundaries was quoted as a percentage by length. The corrosion resistance of strained and welded specimens was examined by ferric sulphatesulphuric acid test 21 for 120 h. The cross-section of the tested specimens was observed by SEM.…”

Section: Methodsmentioning

confidence: 99%

“…Our previous study reported that GBE is effective to suppress intergranular corrosion in austenitic stainless steel even with the small strain and sensitisation treatment following the GBE process. 20 However, the effect of post-GBE strain plus welding on the grain boundary character distribution and resistance to weld decay has not been examined. In particular, it is important to assess whether GBEed materials can retain high weld decay resistance even after strain plus welding.…”

Section: Introductionmentioning

confidence: 99%

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Effect of post-GBE strain on weld decay resistance of grain boundary engineered 304 austenitic stainless steel

Tokita

Ikeshoji

Yamada

et al. 2015

Science and Technology of Welding and Joining

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Weld decay, a severe type of intergranular corrosion in the heat affected zone (HAZ), is a common and serious problem during welding of austenitic stainless steels. Grain boundary engineering (GBE) has been attracting attention as an effective method to prevent weld decay. Remarkably high resistance to weld decay has been reported for grain boundary engineered (GBEed) austenitic stainless steels. In practical applications, however, deformation and welding after the GBE process during manufacturing may alter the grain boundary character distribution and the resistance to weld decay. This study examined the effect of strain plus welding on the intergranular corrosion resistance in the weld HAZ of GBEed 304 austenitic stainless steel. The results show that the GBEed steel retained a much higher corrosion resistance than as received and non-GBEed steel during the same strain plus welding process, even though for both steels the corrosion resistance exhibited a gradual decrease with increasing strain.

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Strain-Annealing Based Grain Boundary Engineering to Evaluate its Sole Implication on Intergranular Corrosion in Extra-Low Carbon Type 304L Austenitic Stainless Steel

Pradhan

Bhuyan

Kaithwas

et al. 2018

Metall Mater Trans A

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Effect of post-GBE strain-sensitisation on corrosion resistance of grain boundary engineered 304 austenitic stainless steel

Cited by 18 publications

References 33 publications

Effect of high temperature compression deformation strain rate on the microstructure and corrosion behavior of 2205 duplex stainless steel

Effect of high temperature compression deformation strain rate on the microstructure and corrosion behavior of 2205 duplex stainless steel

Effect of post-GBE strain on weld decay resistance of grain boundary engineered 304 austenitic stainless steel

Strain-Annealing Based Grain Boundary Engineering to Evaluate its Sole Implication on Intergranular Corrosion in Extra-Low Carbon Type 304L Austenitic Stainless Steel

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