Boley C D, Khairallah S A, Rubenchik A M
Appl Opt. 2015 Mar 20;54(9):2477-82. doi: 10.1364/AO.54.002477.
We have calculated the absorption of laser light by a powder of metal spheres, typical of the powder employed in laser powder-bed fusion additive manufacturing. Using ray-trace simulations, we show that the absorption is significantly larger than its value for normal incidence on a flat surface, due to multiple scattering. We investigate the dependence of absorption on powder content (material, size distribution, and geometry) and on beam size.
我们已经计算了由金属球体粉末对激光的吸收情况，这种粉末是激光粉末床熔融增材制造中所使用粉末的典型代表。通过光线追踪模拟，我们表明，由于多次散射，这种吸收显著大于其在平面上垂直入射时的值。我们研究了吸收对粉末含量（材料、尺寸分布和几何形状）以及光束尺寸的依赖性。
