Stability of nanoscale secondary phases in an oxide dispersion strengthened Fe-12Cr alloy

作者：de Castro V^*; Marquis E A; Lozano Perez S; Pareja R; Jenkins M L

来源：Acta Materialia, 2011, 59(10): 3927-3936.

DOI：10.1016/j.actamat.2011.03.017

• ODS ferritic steel
• Nanoparticles
• Transmission electron microscopy
• Atom-probe tomography

Transmission electron microscopy and atom-probe tomography were used to characterize on a near-atomic scale the microstructure and oxide and carbide phases that form during thermo-mechanical treatments of a model oxide dispersion strengthened Fe-12 wt.% Cr-0.4 wt.% Y(2)O(3) alloy. It was found that some of the Y-rich nanoparticles retained their initial crystallographic structure but developed a Cr-enriched shell, while others evolved into ternary oxide phases during the initial processing. The Y- and Cr-rich oxide phases formed remained stable after annealing at 1023 K for 96 h. However, the number of Cr-rich carbides appeared to increase, inducing Cr depletion in the matrix.

• 出版日期2011-6