Directional recrystallization and microstructures of an Fe-6.5wt%Si alloy
Directional recrystallization and microstructures of an Fe-6.5wt%Si alloy
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DOI：
10.1557/jmr.2009.0303
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发表时间：
2009-08
影响因子：
2.7
通讯作者：
Zhongwu Zhang;Guanglei Chen;H. Bei;Feng Li;F. Ye;Guo-liang Chen;C. Liu
中科院分区：
文献类型：
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作者：
Zhongwu Zhang;Guanglei Chen;H. Bei;Feng Li;F. Ye;Guo-liang Chen;C. Liu
通过改变热区温度和生长速率，研究了Fe-6.5wt%Si合金的定向再结晶。当仔细调整生长参数时，可以产生纵横比大于10的细长（柱状）晶粒。结果发现，在一个固定的增长率，晶粒长度和纵横比增加与增加热区温度。在固定的热区温度下，存在一个临界生长速率，在该速率下柱状晶具有最大的平均长径比。低于或高于该增长率，纵横比减小。织构和晶粒取向分析表明，低能表面和晶界的形成有利于优先选择性生长形成柱状晶。
Directional recrystallization of an Fe-6.5wt%Si alloy was investigated by changing hot zone temperatures and growth rates. Elongated (columnar) grains with an aspect ratio more than 10 can be produced when growth parameters are carefully adjusted. It was found that at a fixed growth rate, the grain length and aspect ratio increase with increased hot zone temperatures. At a fixed hot zone temperature, there is a critical growth rate at which columnar grains have the largest average aspect ratio. Below or above this growth rate, the aspect ratio decreases. Texture and grain orientation analysis showed that the preferentially selective growth to form columnar grains was favored by the formation of low-energy surfaces and grain boundaries.