Growth of nitrided layers on Fe–Cr alloys

Alves Júnior, Clodomiro; Rodrigues, José de Anchieta; Martinelli, Antonio Eduardo

Growth of nitrided layers on Fe–Cr alloys

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dc.contributor.author	Alves Júnior, Clodomiro
dc.contributor.author	Rodrigues, José de Anchieta
dc.contributor.author	Martinelli, Antonio Eduardo
dc.date.accessioned	2021-02-10T20:15:41Z
dc.date.available	2021-02-10T20:15:41Z
dc.date.issued	2000-02-29
dc.description.resumo	Chromium is an important alloying element present in numerous commercial steels. A systematic study on the nitriding behavior of Fe–Cr alloys is helpful in predicting the properties of nitrided Cr-alloyed steels. Aspects such as microstructural evolution, growth kinetics, and mechanical properties should be particularly emphasized. Fe–Cr alloys containing 5, 10, and 20 wt.% Cr have been arc melted and subsequently plasma nitrided under a N2–80% H2 atmosphere. The microstructure of the resulting nitrided layers was characterized and the microhardness profiles evaluated. Thicker layers developed on low chromium alloys. Differences in hardness profiles were also observed as a function of chromium contents. Nitriding Fe–5% Cr alloys resulted in two discrete fronts, refereed to as the diffusion front and the transformation front. Transformed regions sustained a decrease in hardness from 1000 down to 600 HV, associated with the conversion of homogeneously dispersed fine precipitates into coarser needle like particles immersed in the ferritic matrix. Similar behavior was not observed for the other alloys, where both fronts developed simultaneously	pt_BR
dc.identifier.citation	ALVES, Clodomiro; RODRIGUES, José de Anchieta; MARTINELLI, Antonio Eduardo. Growth of nitrided layers on Fe–Cr alloys. Materials Science And Engineering: A, [S.L.], v. 279, n. 1-2, p. 10-15, fev. 2000. Disponível em: https://www.sciencedirect.com/science/article/abs/pii/S0921509399006929?via%3Dihub. Acesso em: 26 nov. 2020. http://dx.doi.org/10.1016/s0921-5093(99)00692-9.	pt_BR
dc.identifier.doi	10.1016/S0921-5093(99)00692-9
dc.identifier.issn	0921-5093
dc.identifier.uri	https://repositorio.ufrn.br/handle/123456789/31469
dc.language	en	pt_BR
dc.publisher	Elsevier	pt_BR
dc.rights	Attribution 3.0 Brazil	*
dc.rights.uri	http://creativecommons.org/licenses/by/3.0/br/	*
dc.subject	Iron–chromium alloys	pt_BR
dc.subject	Surface hardening	pt_BR
dc.subject	Plasma nitriding	pt_BR
dc.title	Growth of nitrided layers on Fe–Cr alloys	pt_BR
dc.type	article	pt_BR