Microstructural Evidence of Abnormal Grain Growth by Solid-State Wetting in Fe-3%Si Steel
Microstructural Evidence of Abnormal Grain Growth by Solid-State Wetting in Fe-3%Si Steel
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DOI：
10.4028/www.scientific.net/msf.467-470.917
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发表时间：
2004-05
期刊：
影响因子：
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通讯作者：
H. Park;Young‐Chang Joo;Doh-Yeon Kim;Jong Tae Park;Jae Kwan Kim;N. Hwang
中科院分区：
文献类型：
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作者：
H. Park;Young‐Chang Joo;Doh-Yeon Kim;Jong Tae Park;Jae Kwan Kim;N. Hwang
本文从晶粒异常长大前沿的微观组织演变规律出发，对Fe-3%Si钢晶粒异常长大机理进行了探讨。异常晶粒生长的最显著特征是沿相邻晶粒晶界沿着渗透。如果穿透的晶界的能量高于由穿透的异常晶粒共享的两个其他晶界的能量之和，则这在能量上是可能的。沿着所研究的异常生长晶粒的生长前沿，1381个三通中有15个显示出异常晶粒穿透晶界的明显显微组织证据。利用电子背散射衍射对34个穿透晶界的取向差测量表明，没有一个晶界具有低角度，这意味着穿透晶界具有高能量。这些结果是最好的解释与固态润湿的异常晶粒生长。
In this investigation, the mechanism of abnormal grain growth in Fe-3%Si steel was based on the microstructure evolution at the growth front of grains undergoing the abnormal growth. The most striking feature in the growth of abnormal grains was the penetration along the grain boundary of neighboring grains. This is energetically possible if the energy of the penetrated grain boundary is higher than the sum of the energy of two other grain boundaries shared by the penetrating abnormal grain. Along the growth front of an investigated abnormally growing grain, 15 out of 1381 triple junctions showed the clear microstructural evidence of the grain boundary penetration by the abnormal grain. Misorientation measurements of 34 penetrated grain boundaries using electron backscattered diffraction showed that not a single boundary has a low angle, implying that the penetrated grain boundaries have the high energy. These results are best explained by the abnormal grain growth with solid-state wetting.