Influence of sigma-phase on mechanical properties and corrosion resistanceof duplex stainless steels

Authors
Lopez, N Cid, M Puiggali, M
Citation
N. Lopez et al., Influence of sigma-phase on mechanical properties and corrosion resistanceof duplex stainless steels, CORROS SCI, 41(8), 1999, pp. 1615-1631
Citations number
16
Categorie Soggetti
Material Science & Engineering
Journal title
CORROSION SCIENCE
ISSN journal
0010938X → ACNP
Volume
41
Issue
8
Year of publication
1999
Pages
1615 - 1631
Database
ISI
SICI code
0010-938X(199908)41:8<1615:IOSOMP>2.0.ZU;2-P
Abstract
In order to appraise the influence of sigma-phase on the behaviour of duple x stainless steels, two tests are performed. The first one is the double lo op electrochemical potentiodynamic reactivation (DLEPR) test that indicates the degree of sensitisation to intergranular corrosion. The second one is the slow strain rate test (SSRT) that enables us to relate the degree of se nsitisation to stress corrosion cracking. A metallurgical study is also per formed on two duplex stainless steels of grade UNS S31803. Sensitisation is carried out by several heat treatments at 675 degrees C or 900 degrees C. The influence of sigma-phase is clearly shown on the mechanical properties and the corrosion resistance. (C) 1999 Elsevier Science Ltd. All rights res erved.