Article
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING  (2010)

Investigations on coarsening of MX and M 23C 6 precipitates in 12% Cr creep resistant steels assisted by computational thermodynamics

Prat, O.; Rojas D.; García J.; Kaysser-Pyzalla A.R.; Carrasco C.

Keywords: electron, thermodynamics, equilibria, simulation, resistance, transmission, plasma, simulations, rates, microscopy, phase, kinetic, creep, resistant, chromium, steels, scanning, coarsening, z-phase, conditions, Computational, Laves-phase, DICTRA, High-alloyed, Thermocalc

Abstract

Coarsening of MX and M 23C 6 precipitates in two 12% Cr high alloyed steels have been investigated at creep conditions of 650°C, 100MPa up to 10,000h. The evolution of precipitates at different creep times was determined experimentally using scanning transmission electron microscopy (STEM). Phase equilibria were calculated with Thermocalc and simulations of coarsening of precipitates were carried out with Dictra. Both the STEM measurements as well as kinetic simulations indicate very low coarsening rates for MX and M 23C 6 precipitates. Dictra simulations showed a reduced influence of Laves phase and Z-phase formation on coarsening of M 23C 6. © 2010 Elsevier B.V.

Más información

Título de la Revista: MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volumen: 527
Número: 21-22
Editorial: ELSEVIER SCIENCE SA
Fecha de publicación: 2010
Página de inicio: 5976
Página final: 5983
URL: http://www.scopus.com/inward/record.url?eid=2-s2.0-77954816789&partnerID=q2rCbXpz