Effect of Solution Annealing on Susceptibility to Intercrystalline Corrosion of Stainless Steel with 20% Cr and 8% Ni

Taiwade, Ravindra V.; Patil, Awanikumar P.; Patre, S. J.; Dayal, R. K.

doi:10.1007/s11665-012-0467-x

Cited by 18 publications

(10 citation statements)

References 12 publications

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“…The EPMA line scans across the grain boundary was obtained in conjunction with SEM using JEOL 8600M Electron Probe Micro analyzer. 11,30) The scan was performed for a set of 30 data points and unit data point corresponds to 1 nm. The EPMA data was processed using "ORIGIN PRO 8" software.…”

Section: Methodsmentioning

confidence: 99%

Effect of Grain Size on Degree of Sensitization of Chrome-Manganese Stainless Steel

et al. 2013

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The use of chrome-manganese stainless steels (Cr-Mn SSs) of 200-series grade has tremendously increased in past few years in various applications like construction, home accessories, office appliances, light poles etc. Their mechanical properties, weldability and corrosion/oxidation resistance provide the best all-round performance stainless steels at relatively low cost. Therefore, they serve as an appropriate alternative to 300-series stainless steels now days. Similar to 300-series steels, Cr-Mn SSs are also submitted to various fabrication practices like welding, hot rolling, cold working, solution annealing or stress relieving processes. This leads to change in their grain size due to higher operating temperature during service. The grain size has a major influence on the intergranular corrosion (IGC) developed due to sensitization phenomena. Several investigations have been made on the influence of grain size on IGC behaviour of 300-series stainless steels, but this information about Cr-Mn SS is scanty till now. Therefore, in this paper an attempt has been made to evaluate the effect of grain growth on degree of sensitization (DOS) of Cr-Mn SS and finally concluded that the DOS decreases with increase in grain size.

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Section: Methodsmentioning

confidence: 99%

Effect of Grain Size on Degree of Sensitization of Chrome-Manganese Stainless Steel

et al. 2013

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“…Figure 4 (a)-(d) shows optical micrographs of nickel free ASS with different percentage of CW and thermal aging at a temperature of 900°C_6 h. The figure demonstrates that the grain boundary attack and grain size varies depending on the percentage of CW and thermal aging temperature. In the absence of CW [0% CW, refer to Figure 4(a)], severe and continuous boundary attack has been observed on the grain boundary (called as ditch structure) at 900 °C_6 h, this temperature is also known as sensitization temperature (Taiwade et al, 2012). Besides the large grain size has been appeared in the microstructure as compare to of SIM, the increase of carbide attack occurs at these interfaces.…”

Section: Microstructurementioning

confidence: 99%

Effect of recrystallization on degree of sensitization in nickel free austenitic stainless steel

Shukla

Patil

Kawale

et al. 2021

ACMM

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Purpose Effect of grain size on degree of sensitization (DOS) was been evaluated in Nickel free steel. Manganese and nitrogen contained alloy is a Ni-free austenitic stainless steels (ASS) having type 202 grade. The main purpose of this investigation is to find the effect of recrystallization on the DOS of stainless steel after the thermo-mechanical processing (cold work and thermal aging). Design/methodology/approach In the present investigation, the deformation of 202 grade analyzed using X-ray diffraction (XRD) and microstructural testing. Optical microstructure of Ni-free ASS has been done for cold worked samples with thermally aged at 900°C_6 h. Double loop electrochemical potentiodynamic reactivation test used for findings of degree of sensitization. Findings Ni-free ASS appears to be deformed more rapidly due to its higher stacking fault energy which gave results in rapid transformation from strain induced martensite to austenite in form of recrystallized grains, i.e. it concluded that as cold work percentage increases more rapidly recrystallization occurs. XRD results also indicate that more fraction of martensite formed as percentage of CW increases but as thermal aging reverted those all martensite to austenite. So investigation gives the conclusion which suggests that with high deformation at higher temperature and duration gives very less DOS. Originality/value Various literatures available for 300 series steel related to the effect of cold work on mechanical properties and sensitization mechanism. However, no one has investigated the effect of recrystallization through thermomechanical processing on the sensitization of nickel-free steel.

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“…Also it is well known from literature that the DOS can be correctly evaluated in the middle of transpassive potential region where anodic dissolution is of grain boundary attack type. 12,22) In the present investigation a quick and rapid electro- chemical impedance spectroscopy (EIS) test was incorporated in the middle of the transpassive potential region for DOS measurement. Figure 6 shows the transpassive potential region in anodic polarization curve obtained in the solution (0.5 M H2SO4 + 0.2 % NaCl) for sample heat treated at 750°C for 576 h (24 days).…”

Section: Electrochemical Impedance Spectroscopy (Eis)mentioning

confidence: 99%

“…R. V. Taiwade et al 11) worked on the qualitative and quantitative comparison of degree of sensitization (DOS) of AISI 304 stainless steel and Cr-Mn ASS to conclude recovery from sensitization which was observed only in AISI 304 grade. R. V. Taiwade et al 12) worked on effect of solution annealing on susceptibility towards IGC of ASS using electrochemical tests. They concluded that the effect of cumulative sensitization and the area of sensitization zone get reduced after solution annealed (SA) heat treatment.…”

Section: Introductionmentioning

confidence: 99%

Assessment of Inter-granular Corrosion Susceptibility of 304L Stainless Steel Using Non-destructive Electrochemical Techniques

2014

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The effect of heat treatment on the corrosion resistance of AISI 304L stainless steel is studied in the present investigation. As-received samples of 304L stainless steel were solution annealed at 1 050°C for 90 minutes followed by thermal ageing at 750°C for various time durations (upto 24 days). ASTM standard A-262 practice A test was used to detect susceptibility of inter-granular attack. Electron dispersive spectroscopy attached to scanning electron microscopy was performed for identification of carbides. It was observed that no significant amount of attack took place upto 1 day. The extent of sensitization was quantitatively evaluated using double loop electrochemical potentiodynamic reactivation test. The results obtained showed that corrosion resistance decreased with an increase in thermal ageing duration. This behavior was attributed to the precipitation of chromium carbides causing depletion of chromium in the areas adjacent to the grain boundaries (as determined by electron probe micro analyzer). The degree of sensitization of highly aged sample was found to be 24.6%. Further, the degree of sensitization in terms of polarization resistance was computed in the middle of the transpassive potential region (at 1.1 V) using electrochemical impedance spectroscopy.

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Effect of Solution Annealing on Susceptibility to Intercrystalline Corrosion of Stainless Steel with 20% Cr and 8% Ni

Cited by 18 publications

References 12 publications

Effect of Grain Size on Degree of Sensitization of Chrome-Manganese Stainless Steel

Effect of Grain Size on Degree of Sensitization of Chrome-Manganese Stainless Steel

Effect of recrystallization on degree of sensitization in nickel free austenitic stainless steel

Assessment of Inter-granular Corrosion Susceptibility of 304L Stainless Steel Using Non-destructive Electrochemical Techniques

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