Microstructure and Mechanical Properties of Pressure-Quenched SS304 Stainless Steel

Wang, Peng; Yang, Zhinan

doi:10.3390/ma12020290

Cited by 9 publications

(5 citation statements)

References 24 publications

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“…Before the test, the SEN sample had slightly higher average HV than AR, most likely due to carbide formation. These may impede dislocation movement after heat sensitization treatment at 649 o C. Generally, the hardness depends on the types of heat treatment process and crystal lattice dislocation at grain boundaries in relation to flow stress in the Hall-Petch relation [36]- [39]. The average HV measured after test were found to be higher than before test by 21% and 30% for AR1 and SEN1, respectively.…”

Section: Table 4: Summarized Results Under the Test Conditions Figure...mentioning

confidence: 99%

Detection and characterization of chloride induced stress corrosion cracking on SS304 under perlite thermal insulation

2023

Sustainable Processes and Clean Energy Transition

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Abstract. Austenitic stainless steel (ASS) type SS304 has been extensively employed in various sectors because of its good structural strength and corrosion resistance. These steels are susceptible to chloride-induced stress corrosion cracking (CISCC), particularly by the effect of chloride corrosive environment under thermal insulation. Corrosive environment formed by external sources or condensation due temperature differences under thermal insulation as a result of inadequate maintenance or unfavourable climatic conditions. It causes localised corrosion and leads to catastrophic failure under the action of tensile stress. The objective of the research was to detect the chloride-induced stress corrosion cracking on SS304 under thermal insulation. This study simulated a real corrosive environment using water containing chloride ions on U-bend samples to estimate the susceptibility and assess CISCC under the drip test method. SS304 as-received (AR) and sensitized (SEN) over-stressed U-bend samples were tested as per ASTM C692 standard. Samples were exposed to 0.1, 1.0, and 3.5 wt. % of NaCl concentrations under perlite thermal insulation and tested at 90oC. Under high chloride concentrations, SEN samples were susceptible more and showed little evidence of crack initiation. The rest of the concentrations showed no evidence of crack, but they showed tiny localized corrosion near the dripping zone. The characteristics of the material structure and the corrosion mechanism were described in a pictorial view.

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Section: Table 4: Summarized Results Under the Test Conditions Figure...mentioning

confidence: 99%

Detection and characterization of chloride induced stress corrosion cracking on SS304 under perlite thermal insulation

2023

Sustainable Processes and Clean Energy Transition

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“…Difraction peaks of the pressure quenched sample were wider than other samples, possible causes could be grain refnement and microstrain during the solidifcation process. Pressure quenched samples were found to possess better hardness and yield strength, although there was no improvement in ultimate tensile strength, and also, the rate of elongation got decreased due to the presence of large density dislocations [21].…”

Section: Introductionmentioning

confidence: 97%

A Comparative Analysis among Quenched, Tempered, and Stepped Cooled TIG Welded SS-304 Plates Based on Tensile Strength, Hardness, and Microstructural Appearance

Dewangan

Saksham

Paul

et al. 2023

Advances in Materials Science and Engineering

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The present experimental work critically analyses the changes in microstructural orientation and mechanical properties of TIG (tungsten inert gas) welded AISI-304 (SS) plates which have undergone through various heat treatments. The characteristics of heat-treated samples have been compared with those of untreated samples which is denoted by the original sample in this study. Five SS-304 plates were welded by the TIG method. Out of five, four plates were heat treated and one plate was put in the original condition. Four heat treatment includes quenching, stepped heat treating (sand + water), tempering-1 (quick quench then sand cooling), and tempering-2 (quick quench then air cooling). In all the five plates, the tensile test and microhardness test have been performed. In addition, microscopic observation of cross-sectional surfaces has also been carried out. The base metal (BM) zone of all five plates mainly consists of equiaxed γ-grains, although twin can be observed only in the original sample. The heat-affected zone (HAZ) imparts both lathy and dendritic type δ-ferrite at the transition of the BM and welded zone (WZ). At the welded zone, the γ-matrix has become coarse with numerous spots and dendrites of δ-ferrite could be seen. Sample 3, tempered by means by water sprinkling for a very short time and then cooling in sand, has shown satisfactory results among all. The sample has achieved the 23% higher extension value and 10% higher hardness at WZ than these of the original sample, although a negligible loss (0.2%) of ultimate tensile strength (UTS) is also reported in sample 3.

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“…Stainless steel (SS) can be divided into four categories: ferritic, martensitic, austenitic, and austenitic+ferritic (or duplex) SS. These steels can be distinguished according to their microstructural appearance at room temperature [3]. Although SS is known for its corrosion-resistant properties, other properties like fracture toughness and oxidative resistance can be altered by the addition of other alloying elements.…”

Section: Introductionmentioning

confidence: 99%

Analysing the Effect of Thermal Treatment With an Aid of Brine Quenching on Microstructural Characteristics and Physical Properties of Aisi-304 Plates

Dewangan,

Sukhwal

2023

Acta Metall Slovaca

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In this work, the effects of brine quenching on the mechanical properties and microstructural attributes of AISI 304 steel have been analysed. For a reference purpose, one sample was kept in ‘as-received’ condition. Three steel plates were treated at 800oC for 1 hour, 1.5 hour and 2 hours respectively. The heated samples were cooled inside brine solution up to room temperature. For mechanical property analysis, all the four plates were cut into standard sized specimens for tensile test, hardness test and toughness test. The microstructural analysis reveals that pitting corrosion has affected the γ-grains as well as δ-boundaries. The ‘as-received’ samples have shown the highest value of ultimate tensile strength (UTS) i.e., 940 MPa with 59.5% of elongation whereas the third heat treated sample, which was heated for 2 hours, has shown a decrement of 13% and 55% in UTS and elongation respectively as compared to these of ‘as received’ sample. As a result of Cr-deterioration and carbide dissolution at grain boundaries, an increase in hardness was recorded in the heat-treated samples. Also, the lowest toughness, 35% lower than as received sample, was recorded in the third sample which are heated for a long period.

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Microstructure and Mechanical Properties of Pressure-Quenched SS304 Stainless Steel

Cited by 9 publications

References 24 publications

Detection and characterization of chloride induced stress corrosion cracking on SS304 under perlite thermal insulation

Detection and characterization of chloride induced stress corrosion cracking on SS304 under perlite thermal insulation

A Comparative Analysis among Quenched, Tempered, and Stepped Cooled TIG Welded SS-304 Plates Based on Tensile Strength, Hardness, and Microstructural Appearance

Analysing the Effect of Thermal Treatment With an Aid of Brine Quenching on Microstructural Characteristics and Physical Properties of Aisi-304 Plates

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