研究目的
The main objective of the present work was to investigate laser irradiation effects on the hardness of gunmetal alloy by using the KrF pulsed excimer laser as a function of a number of laser shots in the range 100–500 and to study the influence on the microstructure of the irradiated samples.
研究成果
The microstructure and hardness of gun metal alloy were significantly altered by laser irradiation, with maximum hardness achieved at 300 laser shots. The study demonstrated a 32% increase in hardness compared to un-irradiated samples, correlating with structural disorder as evidenced by XRD and Raman results. Further increases in laser shots led to decreased hardness, attributed to possible annealing effects.
研究不足
The study was limited to the effects of laser irradiation on gun metal alloy under specific conditions (100–500 laser shots). The findings may not be generalizable to other materials or under different irradiation conditions.
1：Experimental Design and Method Selection:
The study utilized a KrF pulsed excimer laser system to irradiate gun metal alloy samples with different numbers of laser shots (100–500). The effects on microstructure, surface, and hardness were analyzed using X-ray diffraction, Raman spectroscopy, scanning electron microscopy, and Vickers hardness test.
2：0). The effects on microstructure, surface, and hardness were analyzed using X-ray diffraction, Raman spectroscopy, scanning electron microscopy, and Vickers hardness test.
Sample Selection and Data Sources:
2. Sample Selection and Data Sources: Six circular shaped discs were cut from a cylindrical rod of gunmetal copper alloy (C90300). The samples were annealed, cleaned, and then irradiated under controlled conditions.
3：0). The samples were annealed, cleaned, and then irradiated under controlled conditions.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: KrF pulsed excimer laser (Ex50, GAM LASER INC, USA), optical emission spectrometer (Model: J 75/80, Italy), electrical furnace (NeytechQex, USA), XRD (D8 Discover, Bruker, Germany), Raman spectroscopy (BX 41, Lab RAM, HR, Horiba, France), Vickers hardness test (SUNTEC, CLARK, Model: CV-700AT, SER#CV 70546, Japan), SEM (Jeol-JSM-6480 LV, Japan).
4：Experimental Procedures and Operational Workflow:
Samples were prepared, irradiated with varying numbers of laser shots, and then analyzed for structural and mechanical properties.
5：Data Analysis Methods:
XRD and Raman spectroscopy data were analyzed for structural changes, while hardness was measured using Vickers hardness test. SEM was used for surface morphology analysis.
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