Stability of ferritic MA/ODS alloys at high temperatures

被引：236
|
作者：
Miller, MK [1 ]
Hoelzer, DT [1 ]
Kenik, EA [1 ]
Russell, KF [1 ]
机构：
[1] Oak Ridge Natl Lab, Div Met & Ceram, Microstruct Grp, Oak Ridge, TN 37831 USA
来源：
INTERMETALLICS | 2005年 / 13卷 / 3-4期
关键词：
precipitates; mechanical alloying and milling; microstructure;
D O I：
10.1016/j.intermet.2004.07.036
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The ultrafine scale microstructure of three MA/ODS ferritic alloys (12YWT, 14YWT and MA957) have been characterized by atom probe tomography in the as-received condition and after isothermal heat treatments at temperatures of up to 24 h at 1300 degrees C (similar to 85% T-m). Atom probe tomography revealed the presence of a high number density of 2-4 nm diameter titanium-, yttrium- and oxygen-enriched particles. These ultrafine particles were found to be extremely resistant to coarsening during isothermal aging at 1300 degrees C. Solute segregation of the alloying elements to dislocations and grain boundaries was also observed. (c) 2004 Elsevier Ltd. All rights reserved.
引用
收藏
页码：387 / 392
页数：6
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