AISI 304 nitrocarburized at low temperature: Mechanical and tribological properties

Foerster, C.E.; Assmann, André; Silva, S.L.R. da; Nascimento, Fabiana Cristina; Lepienski, C.M.; Guimarães, José Luís de Barros; Chinelatto, Adilson Luiz

doi:10.1016/j.surfcoat.2009.12.030

Cited by 29 publications

(9 citation statements)

References 28 publications

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“…In addition, the empirical rule for which the substrate bulk effect on the measured hardness of a hard film tends to be negligible for small indenter penetration depths, usually smaller than 10-20% of the total film thickness, in accordance with 16 , was confirmed here. In this case, the measured nitrided layer thickness value of 3.3 μm (as shown in Figure 4b) is attained to the condition for which the penetration depth of 500 nm would correspond to 15% of the total nitrided layer thickness.…”

Section: Mechanical Characterization Of the Nitrided Layersupporting

confidence: 84%

First Results of Cavitation Erosion Behavior of Plasma Nitrided Niobium: Surface Modification

et al. 2015

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This work presents the first results of the plasma nitriding study performed in pure niobium in order to increase its cavitation erosion resistance. Samples were prepared from 98.9% purity and 90% reduction cold-rolled niobium bars. Annealing treatment of the cold-worked niobium samples was carried out in vacuum furnace at 1.33 Pa pressure, in the temperature of 1000 °C, for a time of 60 min. Annealed samples showing hardness of 80 HV were cut to dimensions of 20 × 30 × 4 mm 3 . Nitriding treatment was conducted at 1080 °C, gas mixture of 90% N 2 + 10% H 2 , flow rate of 5 × 10 -6 Nm 3 s -1 , and pressure of 1200 Pa (9 Torr), for a total time of 4 h comprised by two treatment steps of 2 h each. For comparison purpose, results for nitrided and non-nitrided niobium are confronted. Samples were characterized by XRD, nanoindentation, microhardness, SEM, and 2D surface topography and 3D interferometry profile analysis techniques. Cavitation testing was conducted according to ASTM G32-09. Comparatively, promising results based on the formation of niobium nitride phases in treated surfaces are presented and discussed in the present work.

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Section: Mechanical Characterization Of the Nitrided Layersupporting

confidence: 84%

First Results of Cavitation Erosion Behavior of Plasma Nitrided Niobium: Surface Modification

et al. 2015

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“…The published literature shows that plasma nitrocarburizing of AISI 304 and AISI 316 austenitic stainless steels leads to a formation of a dual layer comprising of a N-enriched (γ N ) top layer and a C-enriched (γ C ) bottom layer. It was reported that such a dual layer provides not only much needed higher hardness but also better corrosion resistance than the untreated specimens [13][14][15]. It was reported that the presence of molybdenum in AISI 316L stainless steel suppressed the formation of chromium nitride precipitates and promoted the diffusion of interstitial atoms (C, N) during plasma nitrocarburizing.…”

Section: Contents Lists Available At Sciencedirectmentioning

confidence: 99%

Development of highly hard and corrosion resistant A286 stainless steel through plasma nitrocarburizing process

Joseph

Raja

Mukherjee

2015

Surface and Coatings Technology

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“…In principle, more time treatment means more expanding elements in the lattice and higher structure distortion, but at some nitrogen concentrations, formation of nitrides could be triggered, [30] stealing the excess of nitrogen in order to form these compounds and developing the loss of expansion measured. [31] Indeed, nitrides were not detected by GIXRD, but it is probable that the nitride was precipitated by nanoagglomerates in the very surface, so the difficulty of measuring them is high. [32] A possible technique in order to verify the formation of these nanoagglomerates could be the analysis of surface corrosion using potentiodynamic polarization.…”

Section: Nitrided and Carburized Layersmentioning

confidence: 99%

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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AISI 304 nitrocarburized at low temperature: Mechanical and tribological properties

Cited by 29 publications

References 28 publications

First Results of Cavitation Erosion Behavior of Plasma Nitrided Niobium: Surface Modification

First Results of Cavitation Erosion Behavior of Plasma Nitrided Niobium: Surface Modification

Development of highly hard and corrosion resistant A286 stainless steel through plasma nitrocarburizing process

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

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