Effect of pressurized solution nitriding on phase changes and mechanical properties of ferritic Fe–22.7Cr–2.4Mo stainless steel

Mohammadzadeh, Roghayeh; Akbari, Alireza

doi:10.1016/j.msea.2013.10.103

Cited by 11 publications

(5 citation statements)

References 45 publications

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“…For samples GN1200 to GN1320, the elongation increases gradually with an increasing sintering temperature but reverses for samples GN1350 and GN1380. Samples GN1320 and GN1350 have the best mechanical properties among all samples, with a tensile strength of 988.76 and 1036.12 MPa, a yield strength of 615.61 and 636.14 MPa, and an elongation of 42.58 and 40.08%, respectively, which are higher than those previously reported for PM HNSS [ 15 , 16 , 17 , 18 , 19 , 20 ] and cast high-strength HNSS [ 34 ] and are close to those HNSS prepared by hot isostatic pressure [ 35 ] or SPS sintering [ 36 ].…”

Section: Resultsmentioning

confidence: 58%

“…Meanwhile, N in the solid solution significantly affects the γ phase zone. However, previous studies [ 19 , 20 , 21 , 22 , 23 , 24 ] have shown that high-N Cr–Mn austenitic stainless steel will precipitate nitrides when annealed at 700–950 °C with a certain incubation period (such as the TTT curve).…”

Section: Discussionmentioning

confidence: 99%

“…The average solution nitrogen content in the austenite phase was estimated based on lattice parameter calculation according to semi-Vegard’s law (α = 0.3587 + 0.0010 [at. pct N]) [ 19 , 20 ]. Cross-sectional polished samples were prepared to detect center zone by XRD, SEM, and XPS.…”

Section: Methodsmentioning

confidence: 99%

“…However, nitridated HNSS typically has a nitrogen concentration gradient along the cross-section of the sintered part. Furthermore, various phases may be formed during the cooling process after sintering, including the Cr 2 N, σ, and χ phases [ 19 , 20 , 21 , 22 , 23 , 24 ]. A solution treatment followed by rapid cooling effectively eliminates element segregation and the inhomogeneity of the microstructure after nitriding [ 14 ].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Sintering Temperature and Solution Treatment on Phase Changes and Mechanical Properties of High-Nitrogen Stainless Steel Prepared by MIM

Zhang

Huang

et al. 2023

Materials

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High-nitrogen stainless steel (HNSS) has been widely concerned and studied owing to its excellent mechanical, corrosion resistance, and biocompatibility properties. A series of HNSS was prepared by metal injection molding (MIM) using gas atomized Fe–Cr–Mn–Mo–0.3 N duplex stainless steel powders. Both sintering and solution treatments were carried out in an N2 atmosphere. The effects of nitrogen distribution and phase transformation on the mechanical properties of MIM HNSS during sintering and solution were studied. The results show that as the sintering temperature increased, the sample density increased, but the total nitrogen content decreased. Nitrogen and Cr2N concentration gradients along the cross-section of as-sintered samples were formed after cooling. The high nitrogen content promotes the decomposition of γ: γsaturated translated to γ and Cr2N. Meanwhile, the low Mn content in austenite also decomposes γ: γ translated to α and Cr2N. After solution treatment, a single γ phase was obtained for samples sintered at 1200 to 1320 °C. For solution treatment samples sintered at 1320 and 1350 °C, their tensile strength was 988.76 and 1036.12 MPa; yield strength was 615.61 and 636.14 MPa, and elongation was 42.58 and 40.08%, respectively. These values vastly exceeded the published MIM HNSS values.

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Section: Resultsmentioning

confidence: 58%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of Sintering Temperature and Solution Treatment on Phase Changes and Mechanical Properties of High-Nitrogen Stainless Steel Prepared by MIM

Zhang

Huang

et al. 2023

Materials

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“…These steels are to be welded in the form of slim segments to ensure no loss of grain development in microstructure which may end up with properties diminishment when thicker segments are employed. [13][14][15][16] 2 Experimental procedure As the temperature constantly increases, the specimens are allowed to develop a nitrided layer. Now, the experimentation timing is varied accordingly for all four samples by taking out sample from furnace after every 45minutes.…”

Section: Introductionmentioning

confidence: 99%

Assessment of Properties on AISI430 Ferritic Stainless Steel by Nitriding process

Tadepalli¹,

Gosala²,

Kondamuru³

et al. 2020

E3S Web Conf.

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AISI 430 Ferritic Stainless Steel is well known for its good corrosion resistance applicable for high resistance to pitting and stresses. But it lacks in its wear resistance and hardness in order to improve the mechanical properties of AISI 430 Ferritic Stainless-Steel materials Nitriding Heat Treatment is chosen in this project. The samples are taken in the form of cylindrical shapes with diameter 10mm and length 40mm respectively. The specimen is subjected 4 numbers being the highest treated to saturated limit. One specimen is kept as untreated for comparison purpose. Wear test will be carried out under constant speed and with variable load by pin on disk wear testing apparatus. Finally, all the specimens are subjected to various metallographic tests like SEM (Scanning Electron Microscope) and EDAX (X-ray Despresive Analysis) or XRD (X-ray Diffraction) and the results are compared.

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On the Statistical Determination of Yield Strength, Ultimate Strength, and Endurance Limit of a Particle Reinforced Metal Matrix Composite (PRMMC)

Chen

Özden

Bezold

et al. 2015

Direct Methods for Limit and Shakedown Analysis of Structures

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In this paper we present a numerical methodology to determine the load bearing capacity of a random heterogeneous material. It is applied to a particulate reinforced metal matrix composite (PRMMC), WC-30 Wt.% Co, to predict its strength against both monotonic and cyclic loads. In this approach, limit and shakedown analysis based on Melan's static theorem [30] is performed on representative volume element (RVE) models generated from real material microstructure and the obtained results are converted to macroscopic load domains through homogenization. To evaluate microstructure's impact on the overall material strength, the relationship between strength and composite structure is investigated by means of statistics. Meanwhile, several numerical issues, e.g. the impact of RVE's size, mesh density, as well as the discrepancy between 2D and 3D models, are studied.

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Effect of pressurized solution nitriding on phase changes and mechanical properties of ferritic Fe–22.7Cr–2.4Mo stainless steel

Cited by 11 publications

References 45 publications

Effect of Sintering Temperature and Solution Treatment on Phase Changes and Mechanical Properties of High-Nitrogen Stainless Steel Prepared by MIM

Effect of Sintering Temperature and Solution Treatment on Phase Changes and Mechanical Properties of High-Nitrogen Stainless Steel Prepared by MIM

Assessment of Properties on AISI430 Ferritic Stainless Steel by Nitriding process

On the Statistical Determination of Yield Strength, Ultimate Strength, and Endurance Limit of a Particle Reinforced Metal Matrix Composite (PRMMC)

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