Advertisement

Journal of Materials Science

, Volume 45, Issue 18, pp 5089–5093 | Cite as

Intragranular formation of austenite during delta ferrite decomposition in a duplex stainless steel

  • Eduardo Franco de Monlevade
  • Helio Goldenstein
  • Ivan Gilberto Sandoval Falleiros
ICAM 2009

Abstract

A Fe–22.5%Cr–4.53%Ni–3.0%Mo duplex stainless steel was solution treated at 1,325 °C for 1 h, quenched in water and isothermally treated at 900 °C for 5,000 s. The crystallography of austenite was studied using EBSD technique. Intragranular austenite particles formed from delta ferrite are shown to nucleate on inclusions, and to be subdivided in twin-related sub-particles. Intragranular austenite appears to have planar-only orientation relationships with the ferrite matrix, close to Kurdjumov–Sachs and Nishyiama–Wassermann, but not related to a conjugate direction. Samples treated at 900 °C underwent sparse formation of sigma phase and pronounced growth of elongated austenite particles, very similar to acicular ferrite.

Keywords

Ferrite Austenite Orientation Relationship Duplex Stainless Steel Acicular Ferrite 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

References

  1. 1.
    Snape E, Church NL (1972) J Met 24:23Google Scholar
  2. 2.
    Yokomiso T et al (2003) Mater Sci Eng A 344:261CrossRefGoogle Scholar
  3. 3.
    Spanos G, Wilson AW, Kral MV (2005) Metall Mater Trans 36A:1209CrossRefGoogle Scholar
  4. 4.
    Shek CH et al (2000) Metall Mater Trans 31A:15CrossRefGoogle Scholar
  5. 5.
    Beraha E, Shpigler B (1977) Color metallography. ASM, Metals Park, p 160Google Scholar
  6. 6.
    Bunge HJ (1991) Steel Res 62(12):530Google Scholar
  7. 7.
    Monlevade EF, Falleiros IGS (2006) Metall Mater Trans 37A:939CrossRefGoogle Scholar
  8. 8.
    Bieler TR et al (2006) In: 56th electronic components and technology conference (proceedings). IEEE, San DiegoGoogle Scholar
  9. 9.
    Lehman LP et al (2004) J Electr Mater 33:1429CrossRefADSGoogle Scholar
  10. 10.
    Madariaga I, Gutiérrez I, Bhadeshia HKDK (2001) Metall Mater Trans 32A:2187CrossRefGoogle Scholar
  11. 11.
    Díaz-Fuentes M, Gutiérrez I (2003) Mater Sci Eng A 363:316CrossRefGoogle Scholar
  12. 12.
    Pan T et al (2006) Mater Sci Eng A 438–440:1128Google Scholar
  13. 13.
    Pohl M, Storz O (2004) Z Metallk 95:631Google Scholar

Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  • Eduardo Franco de Monlevade
    • 1
  • Helio Goldenstein
    • 1
  • Ivan Gilberto Sandoval Falleiros
    • 1
  1. 1.Departamento de Engenharia Metalúrgica e de MateriaisEscola Politécnica da Universidade de São PauloSão PauloBrazil

Personalised recommendations