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首页> 外文期刊>Journal of thermal stresses >Solid-to-super-critical phase change and resulting stress wave during internal laser ablation
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Solid-to-super-critical phase change and resulting stress wave during internal laser ablation

机译：固态至超临界相变以及内部激光烧蚀过程中产生的应力波

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摘要

The phase change, stress wave generation and propagation, and stress-induced structure damage in a model material (argon) during internal picosecond laser ablation are studied by molecular dynamic simulations. The propagation of the stress wave and fluctuations in temperature is periodic and tightly correlated. The phase-change process from solid to liquid and supercritical fluid and then back to solid occurs as a coupled consequence of heat transfer and the tensile stress wave induced by the laser pulse and the limited internal space. The orientation-radial distribution function is applied to provide substantial information about the atomic density and angle distribution of the crystal structure. It reveals the strong material twisting and permanent damaged region induced by the very high stress fields.
机译：通过分子动力学模拟研究了内部皮秒激光烧蚀过程中模型材料（氩）中的相变，应力波产生和传播以及应力诱导的结构破坏。应力波的传播和温度的波动是周期性且紧密相关的。由于热传递和激光脉冲和有限的内部空间所引起的拉伸应力波的耦合结果，发生了从固态到液态和超临界流体然后回到固态的相变过程。应用取向-径向分布函数可提供有关晶体结构的原子密度和角度分布的大量信息。它揭示了由非常高的应力场引起的强烈的材料扭曲和永久性损坏区域。

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