研究目的
Investigating the mechanism of dissipative structures formed during the interaction of carbon steel 45 with laser radiation.
研究成果
The surface structure during laser exposure belongs to the category of dynamic dissipative, functioning only during the interaction of the material with a concentrated flow of energy. After completion of the laser effect, the dissipative structures become stationary, hereditarily retaining the structure, increased defect density, and the development of internal boundaries.
研究不足
The study focuses on the interaction of laser radiation with carbon steel 45, and the findings may not be directly applicable to other materials or under different conditions.
1：Experimental Design and Method Selection:
Surface hardening of samples from annealed structural steel 45 was carried out on a pulsed-type RLS-300 technological laser facility. The specific energy of a single laser effect W and the power density were calculated by given formulas.
2：Sample Selection and Data Sources:
Samples from annealed structural steel 45 were used.
3：List of Experimental Equipment and Materials:
Pulsed-type RLS-300 technological laser facility, Nikon 200A metallographic microscope, microhardness meter HMV (Shimadzu).
4：Experimental Procedures and Operational Workflow:
Etching of microsections was carried out with a
5：0% solution of nitric acid in ethyl alcohol. Digital images of the microstructure were taken at 400x and 1000x magnification. Image processing of the microstructures was performed using the Image.Pro.Plus.1 program. Data Analysis Methods:
The images of the microstructures were used to determine the quantitative indicators of the structural organization of the material, including the total number of microstructural objects, the total perimeter length of the microstructural objects and their areas, as well as the fractal dimension boundaries.
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