Abstract:The thermal stress damage process of 1080 nm laser ablation of single crystal germanium was recorded in real time using a high-speed CCD. A three-dimensional finite element numerical model based on Fourier's heat conduction equation, Hooke's law and Alexander Hasson equation was developed to analyze the thermal stress damage mechanism involved. The damage morphology of the ablated samples was observed using an optical microscope. The results show that the cooling process has an important influence on the fract… Show more
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