Today, the utilization of millisecond pulse laser drilling, despite the extensive applications in different fields, is accompanied by several limitations such as low penetration depth, high thickness of recast layer, and heat-affected zone. In order to overcome these limitations, different techniques such as applying magnetic field as well as utilizing ultrasonic vibrations have been proposed. Up to now, limited investigations have been conducted regarding the effect of simultaneous addition of magnetic field and ultrasonic vibration on microstructural characteristics; therefore, in this paper, the simultaneous effects of magnetic field (0.5 Tesla intensity) and ultrasonic vibrations (with the frequency of 28 kHz and amplitude of 15 μm) on the formed phases, recast layer and heat-affected zone thickness have been studied in laser drilling of Ti6Al4 V. According to the results, 23.53% and 6.31% reductions were obtained in diameter and depth of the drilled hole compared to conventional laser drilling, respectively. Moreover, the diameter of heat-affected zone, in the inlet of the drilled hole, was reduced by 30.33% in this hybrid process compared to conventional laser drilling. Besides, it was observed that the presence of ultrasonic vibrations prevents from the formation of acicular α structure in the recast region of Ti6Al4 V.

如今，尽管在不同领域得到了广泛的应用，但毫秒级脉冲激光钻孔的使用却伴随着一些局限性，例如低穿透深度，高重铸层厚度和热影响区。为了克服这些限制，已经提出了诸如施加磁场以及利用超声振动的不同技术。迄今为止，关于同时施加磁场和超声振动对显微组织特性的影响，已经进行了有限的研究。因此，在本文中，磁场（0.5特斯拉强度）和超声振动（频率为28 kHz，振幅为15μm）对形成相的同时影响，研究了在Ti6Al4 V的激光钻孔过程中重铸层和热影响区的厚度。与传统的激光钻孔相比，钻孔的直径和深度分别减少了23.53％和6.31％。而且，与传统的激光钻孔相比，在这种混合工艺中，钻孔进口处的热影响区直径减小了30.33％。此外，观察到超声波振动的存在阻止了在Ti6Al4V的重铸区域中形成针状α结构。与传统的激光钻孔相比，这种混合工艺的加工效率为33％。此外，观察到超声波振动的存在阻止了在Ti6Al4V的重铸区域中形成针状α结构。与传统的激光钻孔相比，这种混合工艺的加工效率为33％。此外，观察到超声波振动的存在阻止了在Ti6Al4V的重铸区域中形成针状α结构。