Abstract
Sacrificial ablative layers are used in laser shock peening to protect the component surface from laser induced thermal damages. Factors such as thermal conductivity, absorptivity, acoustic impedance and thickness of the ablative layer play a critical role during the peening process. In this study, we investigated the effect of thickness of an ablative layer (black vinyl tape) on laser peening process intensity. Almen-C strips were peened with increasing thickness of ablative layer to observe changes in arc height deflection. It was found that increasing the thickness of the ablative layer from 130 μm to about 400 μm reduced Almen arc height deflection by more than half of its initial reading. This is attributed to the attenuation of shock wave intensity along the ablative layer due to longer propagation distance. The results suggest an inverse linear correlation between the thickness of ablative layer and laser peening process intensity.
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Ramesh, T., Maharjan, N. (2022). Effect of Ablative Layer Thickness on Laser Shock Peening Process Intensity. In: Wei, Y., Chng, S. (eds) Proceedings of the 2nd International Conference on Advanced Surface Enhancement (INCASE 2021). INCASE 2021. Lecture Notes in Mechanical Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-16-5763-4_6
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DOI: https://doi.org/10.1007/978-981-16-5763-4_6
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