EFEITO DO TEMPO ENTRE DEFORMAÇÕES NA INTERAÇÃO RECRISTALIZAÇÃO: PRECIPITAÇÃO DE UM AÇO INOXIDÁVEL AUSTENÍTICO COM ALTO TEOR DE NIÓBIO E NITROGÊNIO

In this work it was investigated the influence of interpass time on recrystallization-precipitation interaction during thermomechanical processing of the ISO 5832-9 steel. The microstructure evolution was investigated by optical microscopy, transmission electron microscopy and EBSD. The results show...

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Published inTecnologia em metalurgia, materiais e mineração Vol. 12; no. 4; pp. 294 - 303
Main Authors Silva, Mariana Beatriz dos Reis, Gallego, Juno, Marrero, José Maria Cabrera, Balancin, Oscar, Jorge, Alberto Moreira
Format Journal Article
LanguageEnglish
Portuguese
Published Sao Paulo Associação Brasileira de Metalurgia, Materiais e Mineração 01.10.2015
Subjects
Alloys
Deformation
Dislocation pinning
Dynamic recrystallization
Grain boundaries
Microstructure
Optical microscopy
Precipitates
Precipitation
Soaking
Steels
Stresses
Thermomechanical treatment
Transmission electron microscopy
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Summary:In this work it was investigated the influence of interpass time on recrystallization-precipitation interaction during thermomechanical processing of the ISO 5832-9 steel. The microstructure evolution was investigated by optical microscopy, transmission electron microscopy and EBSD. The results show that smaller the interpass time, higher is the stress level and smaller are the grain and precipitate sizes. After soaking, only TiNbN precipitates were found, whereas NbCrN (Ζ-phase) and NbN were formed during thermomechanical processing. The material dynamically recrystallizes and particles of 50 nm were effective in pinning grain boundaries and dislocations.
ISSN:2176-1515
2176-1523
DOI:10.4322/2176-1523.0877