Corrosion behaviour, microhardness and surface characterisation of low energy, high current ion implanted austenitic stainless steel

Picard, S.; Memet, Jean-Bernard; Sabot, R.; Grosseau-Poussard, Jean-Luc; Rivière, J.P.; Meilland, R.

doi:10.1016/s0921-5093(00)01841-4

Cited by 99 publications

(53 citation statements)

References 19 publications

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“…Low energy-high flux implantation-diffusion treatments at moderate temperatures allow to produce relatively thick nitrided layers in different substrates [25][26][27]. In typical austenitic matrices, nitridation leads to the appearance of a metastable γ N phase [28][29][30].…”

Section: -Discussionmentioning

confidence: 99%

Low energy–high flux nitrogen implantation of an oxide-dispersion-strengthened FeAl intermetallic alloy

2004

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Section: -Discussionmentioning

confidence: 99%

Low energy–high flux nitrogen implantation of an oxide-dispersion-strengthened FeAl intermetallic alloy

2004

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“…A literatura descreve essa fase como sendo uma solução sólida supersaturada de nitrogênio na austenita metaestável. De acordo com os autores Menthe e Rie (1999), Pranevicius et al (2001), Picard et al (2001) e Fossati et al (2006, essa fase encontra-se livre de nitretos, com reticulado cristalino CFC altamente expandido, conduzindo a um elevado estado de tensões residuais de compressão na camada nitretada, sendo denominada de "Fase-S" ou "Austenita Expandida - N ". A expansão volumétrica no reticulado CFC, associada à supersaturação em nitrogênio, é observada pelo deslocamento dos picos de difração de raios X para a esquerda, para menores ângulos 2, e pelo seu alargamento.…”

Section: Introductionunclassified

Estrutura e propriedades do aço inoxidável austenítico AISI 316L Grau ASTM F138 nitretado sob plasma à baixa temperatura

Tschiptschin

Pinedo²

2010

Rem: Rev. Esc. Minas

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ResumoOs aços inoxidáveis austeníticos possuem restrições para a nitretação nas temperaturas convencionais, próximas de 550ºC, devido à precipitação intensa de nitretos de cromo na zona de difusão. Essa precipitação eleva a dureza, mas deteriora as propriedades de corrosão. O uso do processo de nitretação sob plasma permite introduzir nitrogênio em temperaturas inferiores a 450ºC, levando à formação de uma fi na camada de austenita expandida pelo nitrogênio ( N ). Essa fase possui uma estrutura cristalina mais bem representada pelo reticulado triclí-nico, com elevada concentração de nitrogênio em solução sólida supersaturada, a qual promove um estado de tensões residuais de compressão capaz de elevar a dureza do substrato de 4 GPa para valores próximos de 14 GPa. O Módulo de Elasticidade mantém-se próximo de 200 GPa após a nitretação. Palavras-chave:Nitretação sob plasma, aço inoxidável austenítico, endurecimento, corrosão. Abstract

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“…The expanded austenite is a layer rich in nitrogen, obtained in austenitic stainless steels like the AISI 304 after nitriding in temperature of 500 ∘ C. Structural analyses show that the modified layer is dominated by a cubic phase with a substantial expansion of the austenite lattice and in some cases a fine layer (<0.1 m) of CrN and -Fe precipitates at the surface. The lattice parameters show that the expanded austenite could be described by a special triclinic crystalline structure [14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Nitriding Process Characterization of Cold Worked AISI 304 and 316 Austenitic Stainless Steels

Monteiro

Pereira

Vatavuk

2017

Journal of Metallurgy

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The nitriding behavior of austenitic stainless steels (AISI 304 and 316) was studied by different cold work degree (0% (after heat treated), 10%, 20%, 30%, and 40%) before nitride processing. The microstructure, layer thickness, hardness, and chemical microcomposition were evaluated employing optical microscopy, Vickers hardness, and scanning electron microscopy techniques (WDS microanalysis). The initial cold work (previous plastic deformations) in both AISI 304 and 306 austenitic stainless steels does not show special influence in all applied nitriding kinetics (in layer thicknesses). The nitriding processes have formed two layers, one external layer formed by expanded austenite with high nitrogen content, followed by another thinner layer just below formed by expanded austenite with a high presence of carbon (back diffusion). An enhanced diffusion can be observed on AISI 304 steel comparing with AISI 316 steel (a nitrided layer thicker can be noticed in the AISI 304 steel). The mechanical strength of both steels after nitriding processes reveals significant hardness values, almost 1100 HV, on the nitrided layers.

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Corrosion behaviour, microhardness and surface characterisation of low energy, high current ion implanted austenitic stainless steel

Cited by 99 publications

References 19 publications

Low energy–high flux nitrogen implantation of an oxide-dispersion-strengthened FeAl intermetallic alloy

Low energy–high flux nitrogen implantation of an oxide-dispersion-strengthened FeAl intermetallic alloy

Estrutura e propriedades do aço inoxidável austenítico AISI 316L Grau ASTM F138 nitretado sob plasma à baixa temperatura

Nitriding Process Characterization of Cold Worked AISI 304 and 316 Austenitic Stainless Steels

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