Effects of pre-strain on sensitization and interganular corrosion for 304 stainless steel

Zhang, Xuewen; Tang, Jianqun; Líu, Hao; Gong, Jianming

doi:10.1016/j.engfailanal.2019.104179

Cited by 20 publications

(5 citation statements)

References 26 publications

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“…Metallography is another method to reveal the martensite phases in ASSs [78,89,96,110]. Etching in different solutions has been used for this purpose: HCl-Na 2 S 2 O 5 (sodium metabisulfite) [74,78,89,[111][112][113] (Fig.…”

Section: Metallographic Methodsmentioning

confidence: 99%

Deformation-induced martensite in austenitic stainless steels: A review

Sohrabi

Naghizadeh

Mirzadeh

2020

Archiv.Civ.Mech.Eng

181

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Recent progress in the understanding of the deformation-induced martensitic transformation, the transformation-induced plasticity (TRIP) effect, and the reversion annealing in the metastable austenitic stainless steels are reviewed in the present work. For this purpose, the introduced methods for the measurement of martensite content are summarized. Moreover, the austenite stability as the key factor for controlling the austenite to martensite transformation is critically discussed. This is realized by analyzing the effects of chemical composition, initial grain size, applied strain, deformation temperature, strain rate, and deformation mode (stress state). For instance, the effect of initial grain size is found to be complicated, especially in the ultrafine grained (UFG) regime. Furthermore, it seems that there is a critical grain size for changing the trend of α′-martensite formation. Decreasing the deformation temperature motivates the formation of α′-martensite, but there is a critical temperature for achieving the maximum tensile ductility. Afterwards, the modeling techniques for the transformation kinetics and the contribution of deformation-induced martensitic transformation to the strengthening of material and also strength-ductility trade-off are critically surveyed. The processing of UFG microstructure during reversion annealing, the effects of the recrystallization of the retained austenite, the martensitic shear and diffusional reversion mechanisms, and the annealing-induced martensitic transformation are also summarized. Accordingly, this overview presents the opportunities that the strain-induced martensitic transformation can offer for controlling the microstructure and mechanical properties of metastable austenitic stainless steels.

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Section: Metallographic Methodsmentioning

confidence: 99%

Deformation-induced martensite in austenitic stainless steels: A review

Sohrabi

Naghizadeh

Mirzadeh

2020

Archiv.Civ.Mech.Eng

181

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“…Many researchers have contributed toward the understanding of sensitization of stainless steels that led to IGC and IGSCC-related corrosion issues. Furthermore, many studies have also devoted to studying different factors such as deformation [7,[11][12][13][14][15][16], grain size [17,18], grain misorientation [10,19], GB character [20][21][22], which affect sensitization kinetics. It is understood that invariably cold working cannot be avoided, and a certain amount of plastic strain is always present in the steels due to manufacturing activities.…”

Section: Sensitization: the Understandings And Current Developmentsmentioning

confidence: 99%

Sensitization of Austenitic Stainless Steels: Current Developments, Trends, and Future Directions

Srinivasan

2021

Metallogr. Microstruct. Anal.

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In this manuscript, the latest developments pertaining to sensitization are discussed. Sensitization leads to intergranular corrosion and intergranular stress corrosion cracking. The advantages and disadvantages of conventional methods to combat sensitization are elaborated. Emerging/newer techniques such as grain boundary engineering, creation of orientation gradients, and high density of twinning to improve resistance to sensitization are also covered. Detection and monitoring of deleterious phase precipitation such as carbides, nitrides, and other intermetallic phases during operation necessitate making use of nondestructive testing (NDT) methods. Possible information that we get from NDT is for material characterization includes the size, shape, and location of a defect. Herein, the significant developments for monitoring and detection of phases concerning sensitization by NDT are discussed. These range from magnetic methods to ultrasonic techniques. The multi-physics approach is essential to fully utilize NDT to ensure/predict the lifetime of the components used in the industry. Further, proper selection of suitable NDT for defect detection can avert accidents, catastrophic failures, and economic losses due to corrosion degradation. For this, the corrosion engineer/corrosionist properly apply the suitable techniques (prevention, monitoring, and assessment) to address the issues of sensitization among the wide choice available.

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“…Thes processes could lead to change in microstructure of stainless steels. Thus, when these stainless steels are deformed and exposed to high heat for a long period of time, chromium carbide could precipitate along the grain boundary and results in the reduction of corrosion resistance [1][2][3][4]. The double loop electrochemical potentiokinetic reactivation (DL-EPR) and cyclic potentiodynamic polarization (CPP) are powerful electrochemical methods used to investigate corrosion properties of the material [5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Tensile Effect on Sensitization and Corrosion Resistance of Stainless Steels

Ieamsupapong,

Taksina,

Phakdeemee

2023

MSF

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The purpose of this research is to investigate cold work effect on corrosion behavior of stainless steels of type AISI 304, AISI 316L and AISI 2101. The specimen were processed through cold work simulated by the tensile test at various percentages elongation and then tempered at 600°C for different time intervals. Two electrochemical techniques and hardness test were utilized in this investigation. The first technique was the double loop electrochemical potentiokinetic reactivation (DL-EPR) that yields the values of degrees of sensitization (DOS). The second one was the cyclic potentiodynamic polarization (CPP) to study the ability of the metals to build or repair the damaged films under localized corrosion. The DOS values from the DL-EPR tests of the samples under the same heating conditions suggested that specimens drawn at higher percentage elongation tend to have more chromium depleted areas. Also, the test specimens with more exposure time to heat were more prone to chromium deficiencies. As for the ability of the metal to create or repair damaged film after corrosion has occurred, it was found that AISI 316L had hihger corrosion resistance than AISI 304. However, AISI 2101 stainless steel had highest corrosion resistance. In this study, it was also found that AISI 2101 did not exhibit pitting corrosion, but the crevice corrosion. This could be due the fact that AISI 2101 which is a duplex stainless steel has high corrosion resistance and could trigger the crevice corrosion take place before the pitting initiation.

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Effects of pre-strain on sensitization and interganular corrosion for 304 stainless steel

Cited by 20 publications

References 26 publications

Deformation-induced martensite in austenitic stainless steels: A review

Deformation-induced martensite in austenitic stainless steels: A review

Sensitization of Austenitic Stainless Steels: Current Developments, Trends, and Future Directions

Tensile Effect on Sensitization and Corrosion Resistance of Stainless Steels

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