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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Determination of an empirical law of aluminium and magnesium alloys absorption coefficient during Nd : YAG laser interaction
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Determination of an empirical law of aluminium and magnesium alloys absorption coefficient during Nd : YAG laser interaction

机译：确定Nd：YAG激光相互作用中铝和镁合金吸收系数的经验规律。

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摘要

Welding laser modelling requires knowledge about relative changes of many thermo-physical parameters involved in the interaction. The absorptivity of the material is one of the most important. In this study, experimental measurements of absorptivity with an integrating sphere on two alloys (aluminium and magnesium) were made. These results were compared with an analytical calculation that takes into account the trapping of the beam by multiple reflections inside the keyhole. Based on a statistical method, an empirical law is proposed connecting absorptivity with the peak power of the laser and the duration of interaction. During the interaction, two distinct phenomenologies are brought to light. A threshold is then defined after which the physical process becomes stable. Below this threshold, the measurement of absorptivity is problematic, and the values are widely dispersed.
机译：焊接激光建模需要有关相互作用中许多热物理参数的相对变化的知识。材料的吸收率是最重要的之一。在这项研究中，对两种合金（铝和镁）进行了积分球吸收率的实验测量。将这些结果与分析计算进行了比较，该计算考虑了钥匙孔内部多次反射对光束的捕获。基于统计方法，提出了将吸收率与激光的峰值功率以及相互作用持续时间联系起来的经验定律。在交互过程中，发现了两种不同的现象。然后定义一个阈值，之后物理过程变得稳定。低于此阈值，吸光度的测量是有问题的，并且这些值广泛分散。

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