Intergranular Corrosion Behavior of Low-Nickel and 304 Austenitic Stainless Steels

Bansod, Ankur V.; Patil, Awanikumar P.; Moon, A. P.; Khobragade, Nilay N

doi:10.1007/s11665-016-2221-2

Cited by 46 publications

(23 citation statements)

References 24 publications

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“…The heat affected zone (HAZ) was observed in all the cases and the measured width is listed in Table 3. However, more width of HAZ was observed in Cr-Mn SS side as compared to 304 SS, which may be due to the higher thermal conductivity of Cr-Mn SS 5 . The ferrite content was measured using Ferritoscope and presented in Table 3.…”

Section: Microstructural Characterizationmentioning

confidence: 91%

“…Metallographic specimens were abraded on a series of emery papers (220, 320, 400, 600, 800, 1000, 1200 grit) followed by mirror polishing using diamond paste. The samples were etched by Marble's reagent (50 ml HCl, 10 gm CuSO 4 , 50 ml double distilled water) for welded zone and by 10 wt% oxalic acid for base metals and heat affected zone (HAZ) 5 . For metallography analysis, an optical microscope (OM), scanning electron microscope (SEM-JOEL 6380A) attached with energy dispersive spectroscopy (EDS) were used.…”

Section: Methodsmentioning

confidence: 99%

“…300 series SS) in the alloying element which provides better corrosion resistance due to its ability to form a passive film (mainly Cr 2 O 3 ) over the surface 3,4 . Generally, Ni is added in this SS's to stabilize the austenitic structure, enlarge the γ phase and helps in the corrosion resistance to some extent 5 . Recent development in the ASS's leads to the addition of manganese (Mn) and nitrogen (N) which further stabilizes the austenitic structure.…”

Section: Introductionmentioning

confidence: 99%

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Microstructure, Mechanical and Electrochemical Evaluation of Dissimilar low Ni SS and 304 SS using Different Filler Materials

et al. 2019

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This study investigates the effect of dissimilar metal welding of low nickel stainless steel (SS) and 304 SS employing tungsten inert gas (TIG) welding process by using three different filler materials (316L, 308L and 310 SS). Microstructural, mechanical properties and corrosion behavior in 3.5% NaCl solution was studied. The microstructural investigation revealed the formation of δ-ferrite and γ-austenite in the weld (welded by 316L and 308L filler). The Higher δ-ferrite content was found more in 316L weld zone. Whereas samples welded by 310 SS filler showed the columnar structure in the weld zone. Relatively wider heat affected zone (HAZ) was measured on Cr-Mn SS side as compared to 304 SS side. Impact fracture surface of all the welded samples exhibited dimple appearance. Corrosion studies showed better pitting corrosion resistance in 316L SS welded sample due to the beneficial effect of δ-ferrite and also the addition of molybdenum (Mo). Electrochemical impedance spectroscopy (EIS) revealed higher polarization resistance (R p) in 316L SS as compared to other fillers. Galvanic current density was found to be higher in Cr-Mn SS as compared to 304 SS when coupled with different welded samples.

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Section: Microstructural Characterizationmentioning

confidence: 91%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Microstructure, Mechanical and Electrochemical Evaluation of Dissimilar low Ni SS and 304 SS using Different Filler Materials

et al. 2019

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“…The degree of sensitization of stainless steels (with and without cold rolling) was obtained through double loop electrochemical potentiokinetic reactivation test (DL-EPR). The test was performed to find the extent of sensitization in 0.5 M H 2 SO 4 1 0.01 M NH 4 SCN solution (Bansod et al, 2016). The sample was kept in open circuit potential for 1 h before the test to stabilize the potential.…”

Section: Experimentationmentioning

confidence: 99%

Effect of thermal aging on IGC of cold worked Cr-Mn austenitic stainless steel

Shukla

Patil

Bansod

2019

ACMM

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Purpose The purpose of this study is to investigate the effect of prior cold work after annealing and thermal ageing on intergranular corrosion or sensitization of Cr-Mn austenitic stainless steel (ASS) is necessary. Such a study is particularly important because ASS are mostly used and welded in mill-annealed condition, which is equivalent to fully annealed material with some cold worked (CW). Design/methodology/approach The effect of 15% CW of 202 ASS were investigated using microstructural (optical microscope), mechanical (grain size and hardness) and electrochemical methods (double loop electrochemical reactivation [DLEPR]) followed by thermal ageing (800°C, 900°C and 1000°C). Findings X-ray diffraction analysis shows the presence of martensite in CW samples. The increase in martensite formation (800°C and 900°C) can be observed with the variation of thermal ageing (TA) duration (1, 2 and 3 h). However, there was decreased in the formation of martensite at the temperature of 1000°C because of martensitic reversal. The DLEPR test result shows higher degree of sensitization (DOS) for 800°C and 900°C but for 1000°C, there was re-homogenization of samples which leads to lower DOS (thermal ageing for 1, 2 and 3 h). Originality/value For 300 series steel, there are various literature available for the effect of cold work on mechanical properties and DOS. However, no one has investigated the effect of cold work and thermal ageing on the sensitization of 202 Cr-Mn ASS.

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“…Grain boundaries have a much greater influence on the mechanical properties of metals than dislocations [4,5]. The high energy level of grain boundaries determines Materials 2021, 14, 5259 2 of 15 the occurrence of many phenomena, such as continuous mobility of boundaries leading to grain growth and lower corrosion resistance [6][7][8]. Grain boundaries also have a strong influence on the ductility of metals.…”

Section: Introductionmentioning

confidence: 99%

Full-Field Temperature Measurement of Stainless Steel Specimens Subjected to Uniaxial Tensile Loading at Various Strain Rates

et al. 2021

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This article presents a study on the effect of strain rate, specimen orientation, and plastic strain on the value and distribution of the temperature of dog-bone 1 mm-thick specimens during their deformation in uniaxial tensile tests. Full-field image correlation and infrared thermography techniques were used. A titanium-stabilised austenitic 321 stainless steel was used as test materials. The dog-bone specimens used for uniaxial tensile tests were cut along the sheet metal rolling direction and three strain rates were considered: 4 × 10−3 s−1, 8 × 10−3 s−1 and 16 × 10−3 s−1. It was found that increasing the strain rate resulted in the intensification of heat generation. High-quality regression models (Ra > 0.9) developed for the austenitic 321 steel revealed that sample orientation does not play a significant role in the heat generation when the sample is plastically deformed. It was found that at the moment of formation of a necking at the highest strain rate, the maximum sample temperature increased more than four times compared to the initial temperature. A synergistic effect of the strain hardening exponent and yield stress revealed that heat is generated more rapidly towards small values of strain hardening exponent and yield stress.

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Intergranular Corrosion Behavior of Low-Nickel and 304 Austenitic Stainless Steels

Cited by 46 publications

References 24 publications

Microstructure, Mechanical and Electrochemical Evaluation of Dissimilar low Ni SS and 304 SS using Different Filler Materials

Microstructure, Mechanical and Electrochemical Evaluation of Dissimilar low Ni SS and 304 SS using Different Filler Materials

Effect of thermal aging on IGC of cold worked Cr-Mn austenitic stainless steel

Full-Field Temperature Measurement of Stainless Steel Specimens Subjected to Uniaxial Tensile Loading at Various Strain Rates

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