Nano-hardening features in high-dose neutron irradiated Eurofer97 revealed by atom-probe tomography - Archive ouverte HAL Access content directly
Journal Articles Journal of Nuclear Materials Year : 2020

Nano-hardening features in high-dose neutron irradiated Eurofer97 revealed by atom-probe tomography

(1) , (2) , (2) , (3) , (1) , (1)
1
2
3

Abstract

Ageing of Cast Austenitic Stainless Steels (CASS) was attributed to the decomposition of the ferrite by spinodal decomposition and precipitation of G-phase particles. This leads to an increase in hardness and a decrease in Charpy-impact energy. It is possible to restore the mechanical properties of these steels by annealing treatment above the Fe-Cr miscibility gap in order to dissolve α' phase. In this work, an annealing treatment for 2 h at 550 °C followed by water quenching was applied to various Mo-free and Mo-bearing steels. This treatment allowed to restore almost completely the mechanical properties of Mo-free steels and partly Mo-bearing steels regardless of the initial ageing time. The mechanical property changes were attributed to the complete dissolution of spinodal decomposition and complete or partial dissolution of G-phase particles. After annealing, a re-ageing kinetics was studied. The preexisting G-phase particles have minor influence on the kinetic of spinodal decomposition until 2,400 h at 400 °C.
Fichier principal
Vignette du fichier
Gomez-Ferrer2020_Nanohardening.pdf (3.8 Mo) Télécharger le fichier
Origin : Publisher files allowed on an open archive
Loading...

Dates and versions

hal-02942855 , version 1 (23-09-2020)

Identifiers

Cite

B. Gómez-Ferrer, C. Dethloff, E. Gaganidze, L. Malerba, C. Hatzoglou, et al.. Nano-hardening features in high-dose neutron irradiated Eurofer97 revealed by atom-probe tomography. Journal of Nuclear Materials, 2020, 537, pp.152228. ⟨10.1016/j.jnucmat.2020.152228⟩. ⟨hal-02942855⟩
30 View
9 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More