Plastic deformation of Al13Fe4 particles in Al–Al13Fe4 by high-speed compression
Plastic deformation of Al13Fe4 particles in Al–Al13Fe4 by high-speed compression
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DOI：
10.1016/s0921-5093(02)00712-8
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发表时间：
2003-06
期刊：
影响因子：
6.4
通讯作者：
N. Yoneyama;K. Mizoguchi;S. Kumai;A. Sato;M. Kiritani
中科院分区：
文献类型：
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作者：
N. Yoneyama;K. Mizoguchi;S. Kumai;A. Sato;M. Kiritani
在高压电子显微镜下观察了高速变形的喷射成形Al-Fe合金。检查了两种类型的标本；一种含有细小的al13fe4颗粒，另一种含有大颗粒。在前一种试样中，根据试样厚度和应变速率的不同，发现变形以三种模式进行：(1)Al13Fe4不变形；(2) Al13Fe4的断裂；(3) Al13Fe4的熔化。发现局部熔化改变了一些al13fe4粒子，在衍射中赋予五重对称或非晶结构。在后一种试样中，引入滑动位错使我们能够确定Al13Fe4的mc102单斜c2/m晶体中的剪切系统。在这些观察结果的基础上，讨论了高速变形的机理，同时考虑了al13fe4在Al基体中的高应力和/或加热状态。
Spray-formed Al–Fe alloys having undergone high-speed deformation were examined under a high-voltage electron microscope. Two types of specimens were examined; one containing fine Al13Fe4particles, and the other containing large particles. In the former specimen, deformation is found to proceed in three patterns, depending on specimen thickness and strain rate: (1) without deformation of the Al13Fe4; (2) breaking of the Al13Fe4; or (3) melting of the Al13Fe4. Local melting is found to alter some of the Al13Fe4particles, to impart five-fold symmetry in diffraction or an amorphous structure. In the latter specimen, introduction of glide dislocations enabled us to determine a shear system in the mc102 monoclinic c2/m crystal of Al13Fe4. On the bases of these observations, the mechanism of high-speed deformation is discussed while taking into account the highly stressed and/or heated states of Al13Fe4embedded in Al matrix.