Artículo
Characterization of Plasma Nitrided Duplex Stainless Steel: Influence of Prior Shot Peening and Nitriding Atmosphere
Dib, Josefina Andrea
; Gomez, Bernardo Jose Armando
; Strubbia, Renata
; Ares, Alicia Esther
; Méndez, Claudia; Fuster, Valeria de Los Angeles
; Hereñu, Silvina Andrea Noemi
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Fecha de publicación:
06/2022
Editorial:
Springer
Revista:
Journal of Materials Engineering and Performance
ISSN:
1059-9495
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
In this work, as-received and shot-peened SAF 2507 duplex stainless steel (DSS) is plasma nitrided (PN) at 400 °C for 6 h. Two different atmospheres are used: 75%N2-25%H2 and 25%N2-75%H2. Microstructural characterizations by optical and scanning electron microscopy and x-ray diffraction (XRD) are carried out. Also, residual stress, microhardness and roughness are measured. Finally, corrosion tests are conducted. XRD of PN samples indicates the presence of expanded austenite γN, expanded ferrite αN, iron nitride ε-Fe3N and chromium nitride CrN. Though all PN samples present a γN decomposition into CrN, α and γ, this reaction is more pronounced in samples treated with lower N2 atmosphere. Microhardness is significantly increased along the nitrided layers. Roughness is slightly increased after PN treatments due to the sputtering effect of the active species in the plasma. Though PN was carried out at 400 °C, that it is reportedly safe to sustain corrosion resistance, it causes CrN precipitation in the studied DSS, which deteriorates corrosion properties.
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Articulos(IFIR)
Articulos de INST.DE FISICA DE ROSARIO (I)
Articulos de INST.DE FISICA DE ROSARIO (I)
Articulos(IMAM)
Articulos de INST.DE MATERIALES DE MISIONES
Articulos de INST.DE MATERIALES DE MISIONES
Citación
Dib, Josefina Andrea; Gomez, Bernardo Jose Armando; Strubbia, Renata; Ares, Alicia Esther; Méndez, Claudia; et al.; Characterization of Plasma Nitrided Duplex Stainless Steel: Influence of Prior Shot Peening and Nitriding Atmosphere; Springer; Journal of Materials Engineering and Performance; 32; 1; 6-2022; 406-414
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