In-Situ Observations of Sigma Phase Dissolution in 2205 Duplex Stainless Steel Using Synchrotron X-Ray Diffraction

Journal Article · Mon Jan 01 00:00:00 EST 2007 · Materials Science and Engineering A

DOI:https://doi.org/10.1016/j.msea.2007.01.071· OSTI ID:962983

Elmer, J. W. ^[1]; Palmer, T. A. ^[1]; Specht, Eliot D ^[2]

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1. Lawrence Livermore National Laboratory (LLNL)
2. ORNL

Synchrotron radiation was used to directly observe the transformation of ferrite, austenite and sigma phases during heating and cooling of 2205 duplex stainless steel. Sigma formed during the initial stages of heating, dissolved as the temperature was increased, and reformed on cooling. The dissolution temperature of sigma was measured to be 985 2.8 C at a heating rate of 0.25 C/s, and the kinetics of sigma formation at 850 Cwas determined to be slower after dissolving at 1000 C than before.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 962983
• Journal Information: Materials Science and Engineering A, Vol. 459, Issue 1-2
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
36 MATERIALS SCIENCE
AUSTENITE
DISSOLUTION
FERRITE
HEATING
HEATING RATE
KINETICS
STAINLESS STEELS
SYNCHROTRON RADIATION
SYNCHROTRONS
TRANSFORMATIONS
X-RAY DIFFRACTION