The nanosecond pulse laser induced the ablation properties on the aluminum alloy under auxiliary heating by numerical simulation View Full Text


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Article Info

DATE

2022-07-14

AUTHORS

Xiaofei Hou, Yansong Pan, Xue Zhang, Zuoqiang Hao, Changli Li

ABSTRACT

In order to improve the ablation efficiency of nanosecond pulsed laser (NPL) in the processing of metallic materials, a physical and mathematical model of the NPL induced ablation characteristics in aluminum alloy was established under the auxiliary heating (AH) irradiated by the millisecond pulsed laser (MPL) based on the basic theories of heat transfer and fluid dynamics, and the ablation characteristics were calculated and analyzed, the temperature fields, the vapor recoil pressure and melt pool sizes were obtained under different auxiliary heat temperature (AHT). The results showed that the AH pretreatment will improve the absorptivity of the target because the absorptivity is a function of the temperature, the temperature and the vapor recoil pressure induced by the NPL are higher than that at room temperature(300 K), so the temperature exceeds easily gasification point, and the vapor recoil pressure exceeds easily too the reverse suppression pressure even if irradiated by a low energy NPL, which can cause shock wave or even phase explosion, much more metal vapor and molten material splash into air from the ablation zone, and the depth and the area of the ablation pool are all increased significantly. Therefore, the AH can improve the ablation efficiency of the NPL by improving the energy utilization of the NPL. This work can provide some theoretical basis and technical support for the development of the laser processing metal field. More... »

PAGES

1-9

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s12596-022-00906-z

DOI

http://dx.doi.org/10.1007/s12596-022-00906-z

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