Characterization of expanded austenite developed on AISI 316L stainless steel by plasma carburization

Molleja, Javier García; Nosei, L.; Ferrón, J.; Bemporad, Edoardo; Lesage, Jacky; Chicot, Didier; Feugeas, J.

doi:10.1016/j.surfcoat.2010.04.036

Cited by 34 publications

(22 citation statements)

References 22 publications

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“…This new phase is known as expanded austenite. [7,11] It is important to mention that after 40 min of nitriding, the (111) peak was located at lower angular values than the same peak obtained when the nitriding process was 80 min of duration. That is, at 40min nitriding, the relative expansion was 6.12%, but this value decreased to 5.04% in samples nitrided for 80 min (Fig.…”

Section: Nitrided and Carburized Layersmentioning

confidence: 73%

Section: Resultsmentioning

confidence: 97%

“…There was a peak intensity difference between time durations when the carburized sample was not irradiated . When the time duration was varied with respect to the bombarding gas, the relative expansion was similar (0.51% at 40‐min carburization and deuterium bombardment and 0.58% at 80‐min carburization and helium bombardment).…”

Section: Resultsmentioning

confidence: 99%

“…Diffraction peaks were shifted to lower angular values because of the addition of nitrogen atoms in the interstitial sites and the expansion of the crystal structure. This new phase is known as expanded austenite . It is important to mention that after 40 min of nitriding, the (111) peak was located at lower angular values than the same peak obtained when the nitriding process was 80 min of duration.…”

Section: Resultsmentioning

confidence: 99%

“…For comparative purposes, the lattice parameter of the base material was measured using the GIXRD technique: AISI 904 L had a constant of 3.6009 Å. The higher Ni concentration in AISI 904 L steels develops higher lattice parameters in comparison with the AISI 300 series, for example, in the works of García Molleja et al [11] and Baldenebro-López et al [28] According to Nascimento et al [29] in their analysis of the two important stainless steels in industry, AISI 316 grade has a parameter lattice of 3.5935 Å, and AISI 304 steel has a value of 3.5918 Å.…”

Section: Nitrided and Carburized Layersmentioning

confidence: 99%

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Behavior of nitrided and carburized AISI 904 L stainless steels under severe light ion beam irradiation with plasma focus

Molleja

Milanese

Moroso

et al. 2015

Surf. Interface Anal.

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Superaustenitic stainless steels have become of growing interest in industrial and technological fields, but there is not a complete understanding on their fundamental properties and their performances. For this paper, AISI 904L superaustenitic samples were nitrided and carburized in order to study the expanded austenite stability under severe deuterium and helium ion bombardment. Surface treatments were conducted using pulsed plasma glow discharges in a low pressure atmosphere, and a dense plasma focus device was used to irradiate the samples. Characterization techniques used were focused ion beam/SEM, energy-dispersive X-ray spectroscopy, and grazing incidence X-ray diffraction. Our results showed in carburized samples lattice expansion growth with the time treatment, but in nitrided samples, an expanded austenite reduction with time treatment was observed due to the formation of nitride nanoagglomerates. Moreover, this ion impingement provoked surface melting and a severe collision cascade, and a damaged bead located under the craters composed solely of minor alloying atoms. Furthermore, nitrided samples were more stable following ion bombardment than the carburized ones. When helium ions were used, the loss of expansion (triggered by diffusion processes of N or C to deeper regions) was more pronounced in the expanded austenite, but when deuterium ions were used to bombard the sample, there was a crystallite development of stressed austenite, which provoked a diffraction peak arousal at 43.3 degrees. Copyright (c) 2015 John Wiley & Sons, Ltd

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Section: Nitrided and Carburized Layersmentioning

confidence: 73%

Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Nitrided and Carburized Layersmentioning

confidence: 99%

See 3 more Smart Citations

Behavior of nitrided and carburized AISI 904 L stainless steels under severe light ion beam irradiation with plasma focus

Molleja

Milanese

Moroso

et al. 2015

Surf. Interface Anal.

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On the adhesion of diamond‐like carbon coatings deposited by low‐pressure plasma on 316L stainless steel

Morand

Chevallier

Bonilla-Gameros

et al. 2021

Surface & Interface Analysis

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Diamond-like carbon (DLC) thin films constitute proven protective coatings due to their outstanding mechanical and tribological properties, combined with a relative chemical inertness and long-term stability. These make them particularly attractive to protect metallic medical implants from corrosion and erosion. However, lack of adhesion between DLC and metallic surfaces is a recurrent problem due to poor interactions with the native oxide layer. An effective strategy to overcome these adhesion issues consists in building interfacial layers. In this context, in this work, the use of a plasma treatment to generate shallow metallic carbide layers was investigated, to promote DLC adhesion directly on the surface of 316L stainless steel (SS).The metallic carbides presence stabilizes and promotes DLC thin film deposition. The highest adhesion was obtained on samples carburized by methane during 20 min with a bias of À700 V. Furthermore, this led to interface amorphization. In conclusion, this study shows that plasma can provide new insights for overcoming the lack of adhesion of DLC thin films on SS metallic surfaces.coating adhesion, depth profile analysis, diamond-like carbon, interface, plasma carburizing | INTRODUCTIONCarbon-based thin films have emerged as potent coatings for a number of applications thanks to the richness and versatility they offer in terms of chemistry and nanostructures. 1,2 In particular, the specific nanostructure of diamond-like carbon (DLC), a metastable form of amorphous carbon characterized by a significant amount of sp 3 bonds, directly confers valuable properties of diamond to the

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Extended X‐Ray Absorption Fine Structure Investigation of Carbon Stabilized Expanded Austenite and Carbides in Stainless Steel AISI 316

Oddershede¹,

Christiansen

Ståhl

et al. 2011

steel research int.

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Low temperature carburized AISI 316 stainless steel -carbon expanded austenite -was investigated with EXAFS and synchrotron diffraction together with synthesized carbides of the type M 3 C 2 , M 7 C 3 and M 23 C 6 . It was found that the chemical environment of carbon expanded austenite is not associated with any of the investigated carbides, that carbon has a strong affinity for chromium, i.e. short range order, and that carbon is in solid solution.

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Characterization of expanded austenite developed on AISI 316L stainless steel by plasma carburization

Cited by 34 publications

References 22 publications

Behavior of nitrided and carburized AISI 904 L stainless steels under severe light ion beam irradiation with plasma focus

Behavior of nitrided and carburized AISI 904 L stainless steels under severe light ion beam irradiation with plasma focus

On the adhesion of diamond‐like carbon coatings deposited by low‐pressure plasma on 316L stainless steel

Extended X‐Ray Absorption Fine Structure Investigation of Carbon Stabilized Expanded Austenite and Carbides in Stainless Steel AISI 316

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