Laser导电模式点熔过程中金属熔池行为的数值研究
Numerical Study of Molten Metal Melt Pool Behaviour during Conduction-mode Laser Spot Melting
摘要：
熔融金属熔池的特征在于高度非线性的响应，这对施加的边界条件非常敏感。在熔池行为的数值模拟中，能量通量分布的时间和空间变化常常被忽略。此外，材料的热物理性质通常被改变，以实现预测的熔池形状和实验凝固后宏观图之间的协议。聚焦于传导模式下的激光点熔化，我们研究了动态调整的能量通量分布和改变热物理材料性质对熔池振荡行为的影响，使用气体-金属界面的变形和非变形假设。我们的研究结果表明，调整吸收的能量通量影响的振荡流体在熔池中的流动行为，从而预测熔池的形状和大小。我们还表明，人为地改变热物理材料的性质或使用一个不变形的表面假设导致显着差异的情况下，这些假设没有作出相比，熔池振荡行为。
英文摘要：
Molten metal melt pools are characterised by highly non-linear responses, which are very sensitive to imposed boundary conditions. Temporal and spatial variations in the energy flux distribution are often neglected in numerical simulations of melt pool behaviour. Additionally, thermo-physical properties of materials are commonly changed to achieve agreement between predicted melt-pool shape and experimental post-solidification macrograph. Focusing on laser spot melting in conduction mode, we investigated the influence of dynamically adjusted energy flux distribution and changing thermo-physical material properties on melt pool oscillatory behaviour using both deformable and non-deformable assumptions for the gas-metal interface. Our results demonstrate that adjusting the absorbed energy flux affects the oscillatory fluid flow behaviour in the melt pool and consequently the predicted melt-pool shape and size. We also show that changing the thermophysical material properties artificially or using a non-deformable surface assumption lead to significant differences in melt pool oscillatory behaviour compared to the cases in which these assumptions are not made.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
