Title
Chi-phase precipitation in a duplex stainless steel
Date Issued
01 November 2009
Access level
metadata only access
Resource Type
journal article
Author(s)
Universidade de São Paulo
Publisher(s)
Elsevier
Abstract
The aim of this study is to investigate the precipitation of intermetallic phases, especially the chi-phase, in a 45N (type UNS S31803) duplex stainless steel through aging heat-treatments carried out at 700 and 750 °C. Two intermetallic phases are detected: chi (χ) and sigma (σ). The χ-phase precipitates at ferrite/ferrite grain boundaries prior to the σ-phase precipitation, which occurs preferentially at ferrite/austenite interfaces and at ferrite/ferrite grain boundaries. The σ-phase precipitation is a eutectoid type reaction of ferrite leading to σ-phase phase and austenite. The χ-phase is consumed in the σ-phase precipitation after becoming completely surrounded by both the σ-phase and the newly formed austenite. © 2009 Elsevier Inc. All rights reserved.
Start page
1214
End page
1219
Volume
60
Issue
11
Language
English
OCDE Knowledge area
Ingeniería de materiales
Subjects
Scopus EID
2-s2.0-70349449498
Source
Materials Characterization
ISSN of the container
10445803
Sponsor(s)
The authors would like to thank the Herrmann von Helmholtz Gemeinschaft (Forschungszentrum Karlsruhe, Institut für Materialforschung I, Germany) for providing the facilities to carry out this work. One of the authors (AFP) wishes to thank CNPq (Brazil) for the provision of visiting fellowship in Germany.
Sources of information:
Directorio de Producción Científica
Scopus