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首页> 外文期刊>Journal of Materials Engineering and Performance >Laser-Pulsed Heating of Aluminum: Cavity Formation at the Surface
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Laser-Pulsed Heating of Aluminum: Cavity Formation at the Surface

机译：铝的激光脉冲加热：表面形成空腔

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Laser evaporative heating of aluminum surface is modeled numerically and mushy zone formation across the solid-liquid and the liquid-vapor phases is introduced in the model study. Temperature rise in the irradiated region and the cavity formation during the laser heating pulse are predicted. Temperature-dependent properties are introduced during the simulations. Oxygen diffusion into the substrate material is considered during the laser heating process while employing temperature-dependent diffusion coefficient. An experiment resembling the simulation conditions is carried out and the morphology of the cavity produced at the surface of the laser-irradiated region is examined using scanning electron microscopy (SEM) and atomic force microscopy (AFM). It is found that the depth of liquid phase increases significantly with the progressing time and the size of the mushy zone across the solid-liquid phase is smaller than that of across the liquid and the vapor phases. The cavity depth, observed from the SEM and AFM micrographs, is shallow and similar to those predicted from the numerical simulations.
机译：对铝表面的激光蒸发加热进行了数值建模，并在模型研究中引入了横跨固液和液汽相的糊状区形成。预测在激光加热脉冲期间照射区域中的温度升高和腔的形成。在仿真过程中引入了随温度变化的特性。在采用取决于温度的扩散系数的同时，在激光加热过程中考虑了氧气向基材材料的扩散。进行类似于模拟条件的实验，并使用扫描电子显微镜（SEM）和原子力显微镜（AFM）检查在激光照射区域的表面产生的空腔的形态。发现液相的深度随着时间的经过而显着增加，并且固液相上的糊状区的尺寸小于液相和汽相上的糊状区的尺寸。从SEM和AFM显微照片观察到的空腔深度较浅，与数值模拟预测的相似。

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