Nanometer scale precipitation in ferritic MA/ODS alloy MA957

被引：177

作者：

Miller, MK ^{[1
]}

Hoelzer, DT ^{[1
]}

Kenik, EA ^{[1
]}

Russell, KF ^{[1
]}

机构：

[1] Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA

来源：

JOURNAL OF NUCLEAR MATERIALS | 2004年 / 329卷

关键词：

D O I：

10.1016/j.jnucmat.2004.04.085

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The microstructure of a commercial mechanically-alloyed oxide dispersion strengthened MA957 alloy has been characterized in the as-received condition and after annealing for up to 24 h at 1300 degreesC (similar to0.85 T-m) by atom probe tomography and electron microscopy. Atom probe tomography revealed a high number density of ultrafine 2-nm-diameter Ti-, Y- and O-enriched particles in the ferrite matrix in the as-received condition. The size increased and the number density of these particles decreased during the annealing treatment for 1 and 24 h at 1300 degreesC. Some coarser (similar to10 nm) Ti-, Y- and O-enriched precipitates were also observed at the grain boundaries. No significant grain growth or recrystallization was observed during the high temperature annealing treatment. Published by Elsevier B.V.

引用

页码：338 / 341

页数：4

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