Grain boundary strengthening in austenitic nitrogen steels

Gavriljuk, V.G.; Berns, Hans; Escher, C.; Glavatskaya, N.I.; Sozinov, A.; Petrov, Yu. N.

doi:10.1016/s0921-5093(99)00272-5

Cited by 92 publications

(29 citation statements)

References 34 publications

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“…Other authors [18][19][20][21] found an increased ISFE with increasing N content. Yakubtsov et al [18,19] determined the stacking fault probability (SFP) for an Fe-8Mn-18Cr-10Ni alloy.…”

Section: Introductionmentioning

confidence: 84%

“…N acts as a strong interstitial hardener of the austenitic phase. [27][28][29][30] The increased strength should also interfere with the transformation from austenite to a¢ martensite, because this transformation is associated with a rather large volume change requiring the plastic deformation of the parent austenite phase. The N is also expected to increase the ductility.…”

Section: ½3mentioning

confidence: 99%

“…The N is also expected to increase the ductility. [27,30] Gavriljuk [32] and Gavriljuk et al [33] attribute the increased ductility of high N steels to an increased metallic component of the interatomic bonds in alloys containing up to 0.4 mass pct N. For higher N contents, Gavriljuk [32] reports an increased covalent contribution to the interatomic bonds, resulting in a lower ductility.…”

Section: ½3mentioning

confidence: 99%

“…Further adding N up to 0.33 mass pct leads to an increase in SFP to 0.028, corresponding to a decreased ISFE. Karaman et al [20] and Gavriljuk et al [21] found that, in a Fe-24Mn-6Si-5Cr shape memory alloy, the ISFE increased when N was added up to 0.4 mass pct. Wan et al [22] calculated that the ISFE increases when maximum 0.25 mass pct of N is added.…”

Section: Introductionmentioning

confidence: 99%

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The Influence of Cr and N Additions on the Mechanical Properties of FeMnC Steels

Bracke¹,

Penning

Akdut

2007

Metall Mater Trans A

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The influence of Cr and N additions on the mechanical properties of austenitic Fe-Mn-Cr-C-N alloys was studied. The ductility and the strain-hardening behavior were investigated in detail, because these alloys may potentially be used for crash-relevant automotive body parts. It was found that Cr and low N additions to a Fe-18Mn-0.25C alloy resulted in a higher ductility and a reduced strain hardening. Increasing the N content up to 0.22 mass pct resulted in a further increase of ductility and a more favorable strain-hardening behavior. X-ray diffraction and transmission electron microscopy studies revealed that the strain-hardening behavior was linked to the presence of strain-induced martensite and mechanical twinning. The analysis of the mechanical properties and the microstructure clearly demonstrates that, in the Fe-Mn-Cr-C-N system, both N additions and combined N and Cr additions increase the stacking fault energy.

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“…Other authors [18][19][20][21] found an increased ISFE with increasing N content. Yakubtsov et al [18,19] determined the stacking fault probability (SFP) for an Fe-8Mn-18Cr-10Ni alloy.…”

Section: Introductionmentioning

confidence: 84%

Section: ½3mentioning

confidence: 99%

Section: ½3mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The Influence of Cr and N Additions on the Mechanical Properties of FeMnC Steels

Bracke¹,

Penning

Akdut

2007

Metall Mater Trans A

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“…[2] The yield and the tensile strength at room temperature increase linearly with nitrogen content in solid solution. [3,4] Since nitrogen is an austenite stabilizing element, it increases the resistance against undesired d-ferrite and suppresses the formation of a-martensite during deformation. [3,5] Moreover, the addition of nitrogen to carbon leads to an increase of stability of homogeneous austenite.…”

Section: Introductionmentioning

confidence: 99%

Influence of the PM-Processing Route and Nitrogen Content on the Properties of Ni-Free Austenitic Stainless Steel

Lefor

Walter

Weddeling

et al. 2014

Metall Mater Trans A

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Ni-free austenitic steels alloyed with Cr and Mn are an alternative to conventional Ni-containing steels. Nitrogen alloying of these steel grades is beneficial for several reasons such as increased strength and corrosion resistance. Low solubility in liquid and d-ferrite restricts the maximal N-content that can be achieved via conventional metallurgy. Higher contents can be alloyed by powder-metallurgical (PM) production via gas-solid interaction. The performance of sintered parts is determined by appropriate sintering parameters. Three major PM-processing routes, hot isostatic pressing, supersolidus liquid phase sintering (SLPS), and solid-state sintering, were performed to study the influence of PM-processing route and N-content on densification, fracture, and mechanical properties. Sintering routes are designed with the assistance of thermodynamic calculations, differential thermal analysis, and residual gas analysis. Fracture surfaces were studied by X-ray photoelectron spectroscopy, secondary electron microscopy, and energy dispersive X-ray spectroscopy. Tensile tests and X-ray diffraction were performed to study mechanical properties and austenite stability. This study demonstrates that SLPS process reaches high densification of the high-Mn-containing powder material while the desired N-contents were successfully alloyed via gas-solid interaction. Produced specimens show tensile strengths >1000 MPa combined with strain to fracture of 60 pct and thus overcome the other tested production routes as well as conventional stainless austenitic or martensitic grades.

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Effect of Nitrogen Addition in 304L Stainless Steel on the IGSCC Crack Growth Rate in Simulated BWR Environment

Roychowdhury

Kain

Prasad

2012

15th International Conference on Environmental Degradation of Materials in Nuclear Power Systems‐Water Reactors

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Grain boundary strengthening in austenitic nitrogen steels

Cited by 92 publications

References 34 publications

The Influence of Cr and N Additions on the Mechanical Properties of FeMnC Steels

The Influence of Cr and N Additions on the Mechanical Properties of FeMnC Steels

Influence of the PM-Processing Route and Nitrogen Content on the Properties of Ni-Free Austenitic Stainless Steel

Effect of Nitrogen Addition in 304L Stainless Steel on the IGSCC Crack Growth Rate in Simulated BWR Environment

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