Microstructure and properties of the high-nitrogen Fe–Cr austenite

Ustinovshikov, Y.; Ruts, A.; Bannykh, O. A.; Blinov, V. M.; Костина, М. В.

doi:10.1016/s0921-5093(98)01015-6

Cited by 30 publications

(25 citation statements)

References 12 publications

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“…Note that the a¢-martensite islands were always restricted to bands of closely spaced e-martensite plates. The observed [27][28][29][30] . Table III orientation relationship obeys both the expected Bogers-Burgers relationship between a¢-martensite and e-martensite and the Kurdjumov-Sachs relationship between a¢-martensite and austenite:…”

Section: Hot-rolled and Annealed Conditionmentioning

confidence: 86%

“…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%

“…The influence of N on the initial stages of deformation in the case of the low Cr alloy was more pronounced: the addition of N markedly reduced the strain-hardening rate, as can be clearly seen in Figure 3(a) and Table II. The N alloying resulted in an increased 0.2 pct proof stress, as can be seen in Figure 3 and Figure 4, the latter containing data of the present work together with data presented by some of the current authors in a previous publication [41] and other literature data. [27][28][29][30] C. Phase Analysis Table III shows the results of the XRD and MSM phase analysis obtained after tensile testing to fracture. It should be noted that the amount of e-martensite present in the material was difficult to determine directly by means of XRD, because many diffraction peaks of austenite, a¢-martensite, and e-martensite overlap and peak deconvolution is complex.…”

Section: Hot-rolled and Annealed Conditionmentioning

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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Section: Hot-rolled and Annealed Conditionmentioning

confidence: 86%

Section: ½3mentioning

confidence: 99%

Section: ½3mentioning

confidence: 99%

Section: Hot-rolled and Annealed Conditionmentioning

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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“…In this way, the interlamellar matrix could be initially formed by supersaturated g N -austenite which later, for 304L N, partially transformed into a/a 0 -phase, as it has been reported for nitrided SS [20,[32][33][34][35]. For 316L N the higher content of Cr, Ni and Mo could justify the absence of ARTICLE IN PRESS a/a 0 -phase due to a much lower martensitic transformation temperature.…”

Section: Article In Pressmentioning

confidence: 63%

Abnormal magnetic behaviour of powder metallurgy austenitic stainless steels sintered in nitrogen

Garcı́a

Martín-Pedrosa

Blanco

2009

Journal of Magnetism and Magnetic Materials

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a b s t r a c tThe magnetic response of AISI 304L and AISI 316L obtained through powder metallurgy and sintered in nitrogen were studied. AISI 304L sintered in nitrogen showed a ferromagnetic behaviour in as-sintered state while AISI 316L was paramagnetic. After solution annealing both were paramagnetic. Magnetic behaviour was analysed by using a vibrating sample magnetometer, a magnetic ferritscope and magnetic etching. A microstructural characterization was performed by means of optical metallography, X-ray diffraction, scanning electron microscopy (SEM) and energy dispersive analysis of X-rays (EDS). Some samples when needed were submitted to aged heat treatments at 675 and 875 1C for 90 min, 4, 6, 8 or 48 h. The main microstructural feature found was the presence of a lamellar constituent formed by nitride precipitates and an interlamellar matrix of austenite and/or ferrite. The abnormal magnetic response was explained based on this.

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The microstructure and tribological behavior of a pre‐cold‐deformed 0.90 % nitrogen containing stainless steel

Zhao

Ren

Dong

et al. 2018

Materialwissenschaft Werkst

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The microstructure of a 0.90 % nitrogen containing stainless steel pre-deformed by cold rolling was analyzed using optical microscopy, transmission electron microscopy and X-ray diffraction; Then the tribological behavior of nitrogen containing stainless steel was investigated using sliding wear method in air and in sodium chloride solutions and the worn surface was observed by a scanning electron microscopy. The results indicated that nitrogen containing stainless steel possessed stable single-phase austenite and the number of mechanical twins increased with increasing cold deformation. In dry wear tests, when the GCr15 bearing steel ball and 304 stainless steel ball acted as the counterpart, the wear resistance of nitrogen containing stainless steel decreased gradually and kept nearly the same, respectively, with increasing cold deformation. The corrosion wear resistance of nitrogen containing stainless steel was improved gradually by cold deformation in the 0.9 % sodium chloride solution and 3.5 % sodium chloride solution, while their friction coefficients were nearly equal.

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Microstructure and properties of the high-nitrogen Fe–Cr austenite

Cited by 30 publications

References 12 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

Abnormal magnetic behaviour of powder metallurgy austenitic stainless steels sintered in nitrogen

The microstructure and tribological behavior of a pre‐cold‐deformed 0.90 % nitrogen containing stainless steel

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