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- Title
Modificações estruturais induzidas por hidrogenação catódica em aço austenítico soldado e nitretado a plasma.
- Authors
Nascimento, Fabiana Cristina; Ferreira, Elton L. D.; Foerster, Carlos Eugênio; Júnior, Clodomiro Alves; Kuromoto, Neide Kazue; Paredes, Ramon Siguifredo Cortes; Lepienski, Carlos Maurício
- Abstract
Structural characterization of weld and outside weld regions of AISI-304 nitrided (20%N + 80%H) and cathodically hydrogenated is presented. Nitriding temperatures were 400, 500 e 550°C. The weld and outside weld regions were compared by XRD, optical microscopy and SEM. The phases &#x03B3-austenite, α'-martensite, ϵ-martensita and α-ferrite and the nitrides: CrN, &#x03B3'-Fe4N e ϵ-Fe2+xN were identifi ed. Microstructures of both regions and the thermal active zone were similar. For 400°C the stoichiometry of the formed phases was different from that formed at 500°C and 550°C. Hydrogen effects were more intense for 550°C, due to chipping occurrence.
- Subjects
HYDROGENATION; NITRIDING; CORROSION &; anti-corrosives; AUSTENITIC stainless steel; MICROSCOPY; STOICHIOMETRY; STEEL welding; SOLDER &; soldering; RIETVELD refinement
- Publication
Rem: Revista Escola de Minas, 2010, Vol 63, Issue 1, p129
- ISSN
0370-4467
- Publication type
Article
- DOI
10.1590/S0370-44672010000100022