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

by J. Elmer, T. Palmer, Eliot D Specht
Publication Type
Journal
Journal Name
Materials Science and Engineering A
Publication Date
Page Numbers
151 to 155
Volume
459
Issue
1-2

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.