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Grain structure and texture of cast iron aluminides

机译:铸铁铝化物的晶粒结构和织构

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摘要

The grain structure and texture of cast iron aluminides have been investigated in the scanning electron microscope by orientation contrast imaging and electron back-scatter diffraction, respectively. Depending on the aluminum concentration the alloys exhibit a fine-grained chill zone, medium grain size columnar zone and/or coarse-grained equiaxed zone. The texture is random except in the columnar zone which is characterized by a <100> fibre texture in the direction of heat flow, Le parallel to the elongated grains. The development of grain structure and texture is discussed with respect to cooling rate, thermal and constitutional undercooling, and order.
机译:铸铁铝化物的晶粒结构和织构已在扫描电子显微镜中分别通过取向对比成像和电子背散射衍射进行了研究。根据铝的浓度,合金表现出细晶粒的冷却区,中等晶粒尺寸的柱状区和/或粗晶粒的等轴区。除了在以热流方向平行于细长晶粒的方向上<100>纤维织构为特征的柱状区之外,织构是随机的。从冷却速度,热和组织过冷以及有序的角度讨论了晶粒结构和织构的发展。

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