Numerical simulation of melt ejection during the laser drilling process on aluminum alloy by millisecond pulsed laser

Zhang Wei; Guangyong Jin; Yibin Wang

doi:10.1117/12.2230375

26 January 2016 Numerical simulation of melt ejection during the laser drilling process on aluminum alloy by millisecond pulsed laser

Zhang Wei, Guangyong Jin, Yibin Wang

Author Affiliations +

Proceedings Volume 9796, Selected Papers of the Photoelectronic Technology Committee Conferences held November 2015; 979621 (2016) https://doi.org/10.1117/12.2230375
Event: Selected Proceedings of the Chinese Society for Optical Engineering Conferences held November 2015, 2015, Various, China

Abstract

In this paper, established a physical model to simulate the melt ejection induced by millisecond pulsed laser on aluminum alloy and use the finite element method to simulate the whole process. A semi-infinite axisymmetric model was established according to the experiment and the analytical solution of temperature in a solid phase was derived based on the thermal conduction equation. Mean while, by assuming that material was removed from the hole once it was melted, the function describing the hole's shape was obtained with the energy balance theory. This simulation is based on the interaction between single pulsed laser with different pulse-width and different peak energy and aluminum alloy material, the result of numerical simulation is that the hole's depth increases with the increase of laser energy and the hole's depth increases with the increase of laser pulse width, the keyhole depth is linearly increased with the increase of laser energy, respectively; the growth of the keyhole radius is in the trend to be gentle. By comparing the theoretical simulation data and the actual test data, we discover that: we discover that: the relative error between the theoretical values and the actual values is about 8.8%, the theoretical simulation curve is well consistent with the actual experimental curve. This research may provide the theoretical references to the understanding of the interaction between millisecond pulsed laser and many kinds of materials, as well as be beneficial to the application of the laser materials processing and military field.

Citation Download Citation

Zhang Wei, Guangyong Jin, and Yibin Wang "Numerical simulation of melt ejection during the laser drilling process on aluminum alloy by millisecond pulsed laser", Proc. SPIE 9796, Selected Papers of the Photoelectronic Technology Committee Conferences held November 2015, 979621 (26 January 2016); https://doi.org/10.1117/12.2230375

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KEYWORDS

Aluminum

Pulsed laser operation

Interfaces

Laser processing

Optical simulations

Laser drilling

Liquids

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