Abstract
The effects of controlling the plasma confinement layer on laser peening were investigated by measuring the hardness and residual stress of laser-peened stainless steels. The plasma confinement layer contributes to increasing the pressure of shock waves by suppressing the expansion of the laser-produced plasma. Most previous studies on laser peening have employed water as the plasma confinement layer. In this study, a glycerol solution is used in the context of a large acoustic impedance. It is found that this glycerol solution is superior to water in its ability to confine plasma and that suitable conditions exist for the glycerol solution to act as a plasma confinement layer to achieve efficient laser peening.
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Tsuyama, M., Ehara, N., Yamashita, K. et al. Effect of laser peening with glycerol as plasma confinement layer. Appl. Phys. A 124, 250 (2018). https://doi.org/10.1007/s00339-018-1675-5
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DOI: https://doi.org/10.1007/s00339-018-1675-5