Stability of ferritic MA/ODS alloys at high temperatures
Stability of ferritic MA/ODS alloys at high temperatures
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DOI：
10.1016/j.intermet.2004.07.036
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发表时间：
2005-03-01
期刊：
影响因子：
4.4
通讯作者：
Russell, KF
中科院分区：
文献类型：
--
作者：
Miller, MK;Hoelzer, DT;Russell, KF
三种 MA/ODS 铁素体合金（12YWT、14YWT 和 MA957）的超细尺度微观结构已在原始状态下以及在 1300 摄氏度（类似于 85% T-m）的温度下进行长达 24 小时的等温热处理后通过原子探针断层扫描进行了表征。原子探针断层扫描显示存在高数密度的直径为 2-4 nm 的钛、钇和氧富集颗粒。人们发现这些超细颗粒在 1300 摄氏度的等温时效过程中具有极强的抗粗化能力。还观察到合金元素对位错和晶界的溶质偏析。 (c) 2004 Elsevier Ltd. 保留所有权利。
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.