Plastic flow behavior and its relationship to tensile mechanical properties of high nitrogen nickel-free austenitic stainless steel

Sun, Guixun; Zhang, Yu; Sun, Shicheng; Hu, Jiangjiang; Jiang, Zhonghao; Ji, Changtao; Lian, Jianshe

doi:10.1016/j.msea.2016.03.057

Cited by 26 publications

(8 citation statements)

References 49 publications

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“…n are constants 10 . It has been reported [8][9][10][11][12][13][14][15] that the composition and the temperature of deformation of austenitic stainless steels influenced strain hardening behaviour and its relation to dislocations arrangement. Schröder et al 16 reported that Mn increase the ultimate tensile strength of metastable austenitic stainless steels.…”

Section: K Andmentioning

confidence: 99%

“…Non-linear regression analysis was performed by R studio software (using Ludwigson Equation 2) in order to obtain the best fit for experimental true stress -strain values. Constants 2 K and 2 n in the Ludwigson equation for the solution annealed and aged samples were determined from the ln (Δ) Vs true plastic strain curve 8,9 , where Δ is the determined from the following equation:…”

Section: Plastic Flow Beahviour Of Nfhnss In the Heat Trated Conditionsmentioning

confidence: 99%

“…Several authors have proposed flow equations to establish the relationship between flow stress and true plastic strain [7][8][9][10] .…”

Section: Introductionmentioning

confidence: 99%

“…Plastic deformation region in flow curve of the metals can be expressed by the following power curve equation 8,9 :…”

Section: Introductionmentioning

confidence: 99%

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Effect of Aging Temperature on Plastic Flow Behaviour and Toughness of Nickel Free High Nitrogen Austenitic Stainless Steels

2023

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In the present study, tensile properties, plastic flow behaviour and impact toughness of Nickel free High Nitrogen Austenitic Stainless Steels (NFHNSS) were evaluated under solution annealed and aged condition (at 700 o C, 800 o C and 900 o C for 14 hours). Plastic flow behaviour was analyzed using Holloman and Ludwigson flow equations. Samples in solution annealed and aged conditions exhibited a flow transition behaviour. Ludwigson flow equation produces best fit for flow transition behaviour. Transmission Electron Microscope (TEM) investigations of NFHNSS samples after tensile test revealed dislocation network and planar arrangement of dislocations adjancent to Grain Boundaries (GB) in the solution annealing and aged conditions respectively. Plastic deformation of NFHNSS occurs by a combination of planar glide and twinning. Impact energy was significantly higher in solution annealed condition than aged condition. Impact energy values decreased with increasing aging temperature. Precipitation and growth as well as morphology of Cr 2 N at the GBs reduce the impact energy values significantly. Presence of larger precipitates readily pull out from GB easily than smaller precipitates at low temperatures. Large precipitate, at the GB's readily pull out at low temperature, compared to slower ones.

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Section: K Andmentioning

confidence: 99%

Section: Plastic Flow Beahviour Of Nfhnss In the Heat Trated Conditionsmentioning

confidence: 99%

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Effect of Aging Temperature on Plastic Flow Behaviour and Toughness of Nickel Free High Nitrogen Austenitic Stainless Steels

2023

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“…The increase in energy pressure forces the material to accelerate the development of energy conservation [1]. High nitrogen steel with Ni element replaced by N element has been paid more and more attention, and the N element content is more over 0.4% [2]. There are many advantages to use N element in steel, such as: a.…”

Section: Introductionmentioning

confidence: 99%

Connection Characteristics of High Nitrogen Steel Electron Beam Welding

Guo¹,

Zhou²,

Kong³

et al. 2017

dtetr

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High nitrogen steel of electron beam welding was studied. The highest tensile strength is 919.2Mpa which strength reaches 83.6% of the base metal. Organizations of joint were observed. The results show that austenite is the main organization, and there is a small amount of C/Cr precipitates in the weld zone. Grains of heat affected zone are significantly enlarged. The austenite in the weld zone is mainly in the form of dendrite. And growth direction is perpendicular to the fusion line. The softening range of joint is about 4mm. Hardness is decreased approximately by 20%. The N element content of HNS joint is only half of the parent material with EBW.

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Effect of Cold Deformation on Microstructure and Mechanical Properties of a Fe–20Mn–19Cr–0.5C–0.6N High Nitrogen Austenitic Steel

Peng

Shi

Cui

et al. 2017

steel research int.

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The effect of cold deformation on microstructure and mechanical properties of a Fe–20Mn–19Cr–0.5C–0.6N high nitrogen austenitic steel has been studied. Microstructural observations show that the low cold deformation is fully dominated by the dislocation structures, namely, pile‐ups, Taylor lattice, and dislocation cells. With further cold deformation, the effect of twinning induced plasticity and grains fragmentation play an important role during cold deformation process. At critical cold deformation reduction range of 26–36%, the microstructural transitions by dislocation planar slip and multiplication gradually transits to twinning. For mechanical properties, with the increase of cold deformation reduction, the yield strength increases from 0.52 to 1.60 GPa, being increased by three times. The flow stress–strain model of the solution‐treated specimen can be described as . In addition, the strength‐elongation product and the cold deformation reduction present a linear relationship with a correlation coefficient of −0.27 to estimate the variation rate of the strength‐elongation product during cold deformation.

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Plastic flow behavior and its relationship to tensile mechanical properties of high nitrogen nickel-free austenitic stainless steel

Cited by 26 publications

References 49 publications

Effect of Aging Temperature on Plastic Flow Behaviour and Toughness of Nickel Free High Nitrogen Austenitic Stainless Steels

Effect of Aging Temperature on Plastic Flow Behaviour and Toughness of Nickel Free High Nitrogen Austenitic Stainless Steels

Connection Characteristics of High Nitrogen Steel Electron Beam Welding

Effect of Cold Deformation on Microstructure and Mechanical Properties of a Fe–20Mn–19Cr–0.5C–0.6N High Nitrogen Austenitic Steel

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