On the strengthening mechanisms of high nitrogen austenitic stainless steels

Odnobokova, Marina; Belyakov, Andrey; Dolzhenko, Pavel; Костина, М. В.; Kaibyshev, Rustam

doi:10.1016/j.matlet.2022.133502

Cited by 17 publications

(5 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For polycrystalline metallic materials, the yield strength is commonly contributed by the combination of solid‐solution strengthening, [ 41 ] precipitation strengthening, [ 42 ] dislocation strengthening, [ 43 ] grain refinement strengthening [ 44,45 ] and phase‐transformation strengthening. [ 46 ] In this study, the yield strength of austenitic stainless steel mainly originates from phase‐transformation strengthening, grain refinement strengthening, and precipitation strengthening.…”

Section: Discussionmentioning

confidence: 99%

The Influence of Tempering Parameters on the Microstructure, Mechanical Property, and the Corresponding Strengthening Mechanism of Metastable 301 Austenitic Stainless Steel

Zhao,

Yang,

Tian

et al. 2024

steel research int.

View full text Add to dashboard Cite

Metastable austenitic stainless steels (MASS) are widely used in various industrial applications due to their exceptional mechanical properties. The microstructure of MASS can be regulated through severe plastic deformation, heat treatments, and surface treatments to achieve further improvement of mechanical properties. Herein, nanograin and quasiheterostructure are prepared by cold rolling and annealing process in Fe–17Cr–6Ni MASS. The mechanical response, deformation mechanism, and strengthening contribution of the two steels with representative microstructure are studied. The results indicate that nanograin austenitic steel (803 MPa, 22%) has superior yield strength and similar ductility compared with that of quasiheterostructure steel (600 MPa, 25%). In the nanograin steel, the deformation mechanism is mainly dislocation slip and deformation‐induced martensite transformation, while in quasiheterostructure steel, the deformation twinning is also included for the relative lower stacking fault energy in the coarse grain. The yield strength of nanograin structural steel is about 200 MPa higher than that of quasiheterostructure steel, which can be attributed to the differences in grain refinement strengthening, phase‐transformation strengthening, and precipitation strengthening of Cu particles. The findings presented in this study are informative for modulating MASS properties and ultimately improving the lifespan in a variety of industrial settings.

show abstract

Section: Discussionmentioning

confidence: 99%

The Influence of Tempering Parameters on the Microstructure, Mechanical Property, and the Corresponding Strengthening Mechanism of Metastable 301 Austenitic Stainless Steel

Zhao,

Yang,

Tian

et al. 2024

steel research int.

View full text Add to dashboard Cite

show abstract

“…To maximize the mechanical properties of austenitic stainless steels at cryogenic temperatures, research on different aspects has been carried out, including retained austenitic stability [8,9], martensitic content [10][11][12], grain size of retained austenite and martensite [13,14] and temperatures and methods of strain [15,16]. The effect of cryogenic The stress-assisted phase transformation in austenitic stainless steels only occurs when the temperature is close to absolute zero, and the phase transformation is less.…”

Section: Effect Of Strain Conditions On Mechanical Propertiesmentioning

confidence: 99%

Constitutive Models for the Strain Strengthening of Austenitic Stainless Steels at Cryogenic Temperatures with a Literature Review

He,

Wang,

2023

Metals

View full text Add to dashboard Cite

Austenitic stainless steels are widely used in cryogenic pressure vessels, liquefied natural gas pipelines, and offshore transportation liquefied petroleum gas storage tanks due to their excellent mechanical properties at cryogenic temperatures. To meet the lightweight and economical requirements, pre-strain of austenitic stainless steels was conducted to improve the strength at cryogenic temperatures. The essence of being strengthened by strain (strain strengthening) and the phase-transformation mechanism of austenitic stainless steels at cryogenic temperatures are reviewed in this work. The mechanical properties and microstructure evolution of austenitic stainless steels under different temperatures, types, and strain rates are compared. The phase-transformation mechanism of austenitic stainless steels during strain at cryogenic temperatures and its influence on strength and microstructure evolution are summarized. The constitutive models of strain strengthening at cryogenic temperatures were set to calculate the volume fraction of strain-induced martensite and to predict the mechanical properties of austenitic stainless steels.

show abstract

“…[1][2][3][4][5] As a strong austenite-stabilizing element, N has a favorable solid-solution strengthening effect. [6] Moreover, it can increase the strength of stainless steel by 2-4 times without affecting its ductility and toughness. [7][8][9][10] Compared to traditional austenitic stainless steel (8-25% Ni), HNSS costs significantly less and has broader market and development prospects.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Mold Powders for High‐Nitrogen Stainless Steel Based on Mold Thermocouple Temperature Variation

Chen

Wen

Tang

et al. 2023

steel research int.

View full text Add to dashboard Cite

High‐nitrogen stainless steel (HNSS) is prone to surface depression during continuous casting; however, its high‐temperature solidification characteristics and mold powder design have not been reported. Based on the analysis of mold thermocouple temperature variation, this study clarifies the high‐temperature solidification characteristics of HNSS and the cause of surface depression. It optimizes the mold powder for HNSS continuous casting according to factory and laboratory research. The factory trials indicate that the mold thermocouple temperature at the corresponding location decreases by 6.0–20.9 °C when the slab surface is depressed. The analysis shows that the high initial solidification strength of HNSS causes its slab surface depressions. Owing to this characteristic, the mold powder for HNSS should have a suitable melting rate, low basicity, and proper Al2O3. This low‐basicity Al2O3‐containing slag has a crystal slag film near the mold side and a thick liquid slag film near the slab. It can both provide good lubrication and control horizontal heat transfer.

show abstract

On the strengthening mechanisms of high nitrogen austenitic stainless steels

Cited by 17 publications

References 12 publications

The Influence of Tempering Parameters on the Microstructure, Mechanical Property, and the Corresponding Strengthening Mechanism of Metastable 301 Austenitic Stainless Steel

The Influence of Tempering Parameters on the Microstructure, Mechanical Property, and the Corresponding Strengthening Mechanism of Metastable 301 Austenitic Stainless Steel

Constitutive Models for the Strain Strengthening of Austenitic Stainless Steels at Cryogenic Temperatures with a Literature Review

Optimization of Mold Powders for High‐Nitrogen Stainless Steel Based on Mold Thermocouple Temperature Variation

Contact Info

Product

Resources

About