Femtosecond laser-driven shock-induced dislocation structures in iron
Femtosecond laser-driven shock-induced dislocation structures in iron
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DOI：
10.7567/apex.7.122704
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发表时间：
2014-12
影响因子：
2.3
通讯作者：
T. Matsuda;T. Sano;K. Arakawa;O. Sakata;H. Tajiri;A. Hirose
中科院分区：
文献类型：
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作者：
T. Matsuda;T. Sano;K. Arakawa;O. Sakata;H. Tajiri;A. Hirose
我们发现，飞秒激光驱动的冲击波在 1.3 至 8.3 J/cm2 的注量范围内会引起铁中位错结构的显着变化。透射电子显微镜观察显示，位错结构从具有扭曲边界的板条结构变为仅板条结构，并且随着注量的增加，板条开始出现的深度增加。 X射线衍射结果表明，微晶尺寸的分布与位错结构的变化相对应。我们提出，位错结构是由激光注量通过冲击波持续时间的变化来确定的。
We found that a femtosecond laser-driven shock wave induces marked changes in dislocation structure in iron over a fluence range from 1.3 to 8.3 J/cm2. Transmission electron microscopy observations showed a change in dislocation structure from lath structures with twist boundaries to only laths, and an increase in depth where laths begin to appear, with increasing fluence. X-ray diffraction results showed the distribution of crystallite sizes corresponding to the change in dislocation structure. We proposed that the dislocation structure is determined by the laser fluence, through the change in the duration of the shock wave.