Distribution of the precipitates on the grain boundaries in Fe-3%Si steel during secondary recrystallization annealing

被引：1
|
作者：
Yim, Jung-Ryoul [1 ]
Min, Ah-Ri [1 ]
Park, Jong-Tae [2 ]
Joo, Young-Chang [1 ]
机构：
[1] Seoul Natl Univ, Sch Mat Sci & Engn, Seoul, South Korea
[2] POSCO, Tech Res Lab, Pohang, Gyeongbuk, South Korea
来源：
RECRYSTALLIZATION AND GRAIN GROWTH III, PTS 1 AND 2 | 2007年 / 558-559卷
关键词：
abnormal grain growth; Fe-3%Si steel; grain boundary; high angle annular dark field image; multi-phased precipitate;
D O I：
10.4028/www.scientific.net/MSF.558-559.1453
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The distribution of the precipitates on the grain boundaries in Fe-3%Si steel during secondary recrystallization annealing were studied using high-angle annular dark filed (HAADF) scanning transmission electron microscopy (STEM). Because HAADF image can show both grain boundaries and precipitates clearly, the change of precipitate distribution on grain boundaries can be quantitatively analyzed. It was observed that the total area of the precipitates on grain boundaries increased in the order of non-annealed, 600 degrees C, and 900 degrees C sample and the total area of precipitates on grain boundaries in the 1000 degrees C sample was much lower than that in the 900 degrees C sample. The compositions of the precipitates were also analyzed using X-ray energy-dispersive spectrometer (XEDS). The most precipitates were multi-phase ones, mainly composed of AIN and MnS. Our analysis results suggest that such a precipitate behavior is responsible for the abnormal grain growth of Fe-3%Si steel occurring under the temperature above 900 degrees C.
引用
收藏
页码：1453 / +
页数：2
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