Cu precipitation-mediated formation of reverted austenite during ageing of a 15–5 PH stainless steel
Tao Zhou, Benjamin Neding, Sen Lin, Jochi Tseng, Peter Hedström
Abstract
A Cu precipitation-mediated austenitic transformation during ageing treatment of a 15–5 PH stainless steel is revealed through atom probe tomography, in situ synchrotron X-ray diffraction and computational thermodynamics and kinetics. The austenitic transformation is proposed to occur through the pathway: Cu precipitation at the martensite/retained austenite interfaces or at martensite lath boundaries → partitioning of austenite stabilizing elements towards interfaces of the Cu precipitates → reverted austenite formation.
Topics & Concepts
AusteniteLathMaterials sciencePrecipitationMartensiteMetallurgyAtom probeBainiteDiffusionless transformationShape-memory alloyMicrostructureMeteorologyPhysicsMicrostructure and Mechanical Properties of SteelsHydrogen embrittlement and corrosion behaviors in metalsWelding Techniques and Residual Stresses