Kinetics of Cr2N Precipitation and Its Effect on Pitting Corrosion of Nickel-Free High-Nitrogen Austenitic Stainless Steel

Kumar, K. Krishna; Anburaj, J.; Dhanasekar, R.; Satishkumar, T.; Abuthakir, J.; Manikandan, P.; Subramanian, Ramanathan

doi:10.1007/s11665-020-05098-w

Cited by 12 publications

(1 citation statement)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Precipitation kinetics of Cr 2 N were reported in Fe-20Mn-12Cr-0.24C-0.32N alloy that precipitation of Cr 2 N is favoured at 900 °C, as the driving force is higher at this temperature 12 . Krishna Kumar et al 13 reported the kinetics of nitride precipitation at 700°C to 900°C aging temperatures using CALPHAD simulation. Simulations studies were also carried out by Lang et al 14 to investigate the effect of various alloying elements (C, Cr, Mn and Ni) on nitrogen solubility at 1000°C to 1200°C and found that stable austenite phase were simulated within a given range of alloying elements using Thermo-Calc.…”

Section: Introductionmentioning

confidence: 99%

Thermomechanical Simulation of Heat-Affected Zones in Nickel-Free High Nitrogen Stainless Steel: Microstructural Evolution and Mechanical Property Studies

Ramalingam

Veerappagounder²,

Rangaswamy

2023

Mat. Res.

View full text Add to dashboard Cite

Three different Heat Affected Zones (HAZ) in hot rolled Nickel Free High Nitrogen Stainless Steels (NFHNSS) based on three different peak temperatures were physically simulated using Gleeble Simulator to investigate microstructural evolution and structure-property correlation. Optical microscopy revealed that the austenite grains are recrystallized in the simulated heat affected zone in the peak temperature range of 750 o C to 1050 o C. Extent of recrystallization of grains and nucleation of precipitates varied with peak temperatures. TEM characterization showed the presence of Cr 2 N precipitate having an average particle size in the range of 300 nm to 395 nm in the simulated HAZ were confirmed by Selected Area Electron Diffraction (SAED) analysis. Precipitation kinetics of Cr 2 N were simulated using Thermo-Calc were found to correlate well with experimental values. Mechanical properties of specimens taken from three different HAZ were evaluated for tensile strength and hardness. Variation in strength of the different specimens has been discussed using various strengthening models. Fractography analysis was also carried out to understand the effect of peak temperature on fracture behaviour. Transition in fracture patterns in NFHNSS from ductile to mixed mode was observed for different specimens.

show abstract

Section: Introductionmentioning

confidence: 99%