Open AccessSolidification path and phase transformation in super-austenitic stainless steel UNS S31254
Author(s) -
Raphaël Marin,
Hervé Combeau,
Julien Zollinger,
Moukrane Dehmas,
Bernard Rouat,
Aude Lamontagne,
David Cardinaux,
Lucile Lhenry-Robert
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/529/1/012008
Subject(s) - austenite , alloy , materials science , precipitation , phase (matter) , metallurgy , complementarity (molecular biology) , path (computing) , scanning electron microscope , thermodynamic equilibrium , thermodynamics , microstructure , composite material , chemistry , physics , computer science , organic chemistry , biology , meteorology , genetics , programming language
The solidification path and the σ-phase precipitation mechanism of UNS S31254 alloy were studied on the basis of directional solidified experiments accompanied by scanning electron microscopy observations and energy dispersive X-ray a nalysis. The resulting temperatures of solidification paths and phase transformation were compared with Gulliver-Scheil and equilibrium calculations predicted using ThermoCalc © software. It was confirmed that the experimental solidification path was in agreement with the thermodynamic calculations. The complementarity of the results have made it possible to propose a solidification path and a σ-phase precipitation mechanism for the UNS31254 steel.