Reflectivity of 30CrMnSiA steel under continuous-wave laser repeated irradiation

Yunsheng, 金云声 Jin; Fuli, 谭福利 Tan; Mu, 李牧 Li; Yongqiang, 张永强 Zhang; Zhao, Jianheng

doi:10.3788/hplpb20122412.2827

Cited by 1 publication

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“…In above formula, ρ is the density, cp is the specific heat capacity, K is the thermal conductivity, α is the absorption coefficient of the sample, η is the photothermal absorption rate of the sample surface (the value is determined according to the experimental results [10][11] ), and I0 is the power density of the flat-top Continuous-Wave laser. But formula(1) cannot describe the situation that PCS undergoes a pyrolysis and phase transition.…”

Section: Theoretical Modelmentioning

confidence: 99%

Numerical calculation for thermal effect of polycarbosilane composite coating irradiated by continuous-wave laser

Luo

Zhang

et al. 2023

AOPC 2022: Novel Optical Design; And Optics Ultra Precision Manufacturing and Testing

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Based on the Fourier heat exchange equation, the heat-damage model irradiated by continuous-wave laser is developed on the basis of considering the phase transition of the material. Using the model, the temperature field in 30CrMnSi steel substrate that coated by polycarbosilane (PCS) composite coating are analyzed. And the effects of laser parameters and coating thickness on the temperature field are discussed too. The calculation results agree well with the experimental results, which can provide the theoretical basis for analyzing the laser ablation effect of laser protection material, such as PCS. The simulation results demonstrate that, the PCS composite coating provides obvious thermal protection to the 30CrMnSi steel substrate and the laser-to-target power density of continuous-wave laser has more sensitive influence on the PCS laser-proof effect.

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Section: Theoretical Modelmentioning

confidence: 99%