Grain growth in Fe-30at.%Al
Grain growth in Fe-30at.%Al
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DOI：
10.1016/1359-6462(96)00188-1
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发表时间：
1996-09
影响因子：
6
通讯作者：
K. Farrell;P. Munroe
中科院分区：
文献类型：
--
作者：
K. Farrell;P. Munroe
研究了 Fe-30at.% Al 的晶粒长大行为。人们发现，用于揭示晶粒边界的蚀刻溶液取决于被蚀刻的晶粒的方向，因此要适当小心，以免使任何测量产生偏差。计算机分析表明，颗粒面积近似对数正态分布，空间分布均匀，长宽比接近统一。然后使用晶粒尺寸数据确定该合金在 1,073K 至 1,373K 温度范围内的晶粒生长指数。研究发现晶粒生长指数随着温度的升高而增加，然后在 1,223K 时变得不变。使用 n 不变的三个温度的数据来计算该材料中晶粒生长的活化能，结果为 340 kJ/mol。发现该值接近但稍超出基于扩散活化能的已知数据的预期值范围。
The grain growth behavior of Fe-30at.% Al has been investigated. It was found that the etching solution used to reveal the grain boundaries was dependent on the orientation of the grains being etched, thus suitable care was exercised so as not to bias any measurements. Computer analysis indicated that the grain areas were distributed in an approximately log-normal manner, possessed a homogeneous spatial distribution, and had aspect ratios approaching unity. The grain size data was then used to determine the grain growth exponent for this alloy at temperatures ranging from 1,073K to 1,373K. The grain growth exponent was found to increase as temperature increased, prior to becoming invariant at 1,223K. Data for three temperatures where n was invariant were used to calculate the activation energy for grain growth in this material, which was found to be 340 kJ/mol. This value was found to be close to, but slightly outside, the expected range of values based on known data for diffusion activation energies.