Microstructural characterization of Y2O3 ODS-Fe-Cr model alloys

被引：43

作者：

de Castro, V. ^{[1
]}

Leguey, T. ^{[2
]}

Munoz, A. ^{[2
]}

Monge, M. A. ^{[2
]}

Pareja, R. ^{[2
]}

Marquis, E. A. ^{[1
]}

Lozano-Perez, S. ^{[1
]}

Jenkins, M. L. ^{[1
]}

机构：

[1] Univ Oxford, Dept Mat, Oxford OX1 3PH, England

[2] Univ Carlos III Madrid, Dept Fis, Leganes 28911, Spain

来源：

JOURNAL OF NUCLEAR MATERIALS | 2009年 / 386-88卷

基金：

英国工程与自然科学研究理事会;

关键词：

STEEL; EUROFER-97; DISPERSION;

D O I：

10.1016/j.jnucmat.2008.12.136

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Two Fe-12 wt% Cr alloys, one containing 0.4 wt% Y2O3 and the other Y2O3-free, have been produced by mechanical alloying followed by hot isostatic pressing. These oxide dispersion strengthened and reference alloys were characterized both in the as-HIPed state and after tempering by transmission electron microscopy and atom-probe tomography. The as-HIPed alloys exhibited the characteristic microstructure of lath martensite and contained a high density of dislocations. Small voids with sizes <10 nm were also observed. Both alloys also contained M3C and M23C6 carbides (M = Cr, Fe) probably as a result of C ingress during milling. After tempering at 1023 K for 4 h the microstructures had partially recovered. In the recovered regions, martensite laths were replaced by equiaxed grains in which M23C6 carbides decorated the grain boundaries. In the ODS alloy nanoparticles containing Y were commonly observed within grains, although they were also present at grain boundaries and adjacent to large carbides. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：449 / 452

页数：4

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