Open AccessDevelopment of a methodology for measuring the evolution of duplex stainless-steel low-temperature plasma nitrided phases expansion using confocal laser scanning microscopy
Author(s) -
Carlos Eduardo Alves Feitosa,
Rodrigo Perito Cardoso,
Sílvio Francisco Brunatto
Publication year - 2021
Publication title -
revista brasileira de aplicações de vácuo
Language(s) - English
Resource type - Journals
eISSN - 1983-4047
pISSN - 0101-7659
DOI - 10.17563/rbav.v40.1194
Subject(s) - nitriding , materials science , austenite , duplex (building) , plasma , sputtering , thermal diffusivity , ferrite (magnet) , metallurgy , phase (matter) , confocal laser scanning microscopy , analytical chemistry (journal) , composite material , microstructure , thermodynamics , thin film , nanotechnology , chemistry , layer (electronics) , dna , biochemistry , physics , organic chemistry , quantum mechanics , chromatography , medicine , biomedical engineering
Samples of duplex stainless steel SAF 2507 were low-temperature plasma nitrided to characterize separately, on the surface, the behavior of its ferrite and austenite phases in relation to two competing processes, that is, one caused by enrichment by nitrogen, resulting in possible expansion, and the other caused by the removal of superficial atoms via sputtering, which may lead to the retraction of the studied phases. Since these phases have different different compositions and crystalline structures, of which the diffusivity and solubility of nitrogen in them are dependent, a different response for each type of phase can be expected. In this article, an innovative methodology has been developed to quantify and clarify which effects are predominant in the course of nitriding for each of these phases. The results indicate that phase expansion prevails over sputtering.