研究目的
Investigating the formation of microstructures on metal surfaces under the interaction of laser radiation of nanosecond durations in the regime of near-threshold melting and explaining the anisotropic character of metal recrystallization.
研究成果
The formation of microstructures on metal surfaces under laser radiation was analyzed, revealing the generation of regular structures and quasi-gratings. A qualitative model based on the effect of skin-layer electrons dragged by surface plasmon polaritons was suggested to explain the anisotropic grain growth. The effect is considered a surface analog of the electroplasticity effect.
研究不足
The study is limited to the interaction of laser radiation with titanium surfaces and does not explore the effects on other metals or under different conditions. The physical model of quasi-grating formation is qualitative and requires further quantitative validation.
1：Experimental Design and Method Selection:
The study involved the interaction of linear polarized laser radiation with mechanically polished titanium surfaces to observe the formation of spatial gratings and quasi-gratings.
2：Sample Selection and Data Sources:
VT1-0 titanium plates were used, with laser radiation focused onto the sample surface.
3：List of Experimental Equipment and Materials:
Nd3+:Yttrium Aluminum Garnet (YAG) laser, lens with focal length f = 18 cm, integrated sphere for reflectivity dynamics measurement, optical microscopy, and atomic force microscopy.
4：Experimental Procedures and Operational Workflow:
The samples were irradiated with laser pulses, and the evolution of micro- and nanorelief was observed through three consecutive stages.
5：Data Analysis Methods:
The spatial periods of the gratings were analyzed in the framework of the universal polariton model (UPM).
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