研究目的
Investigating the influence of moving dislocations on mass-transfer and accompanying phenomena in pulse-deformed metals under pulsed laser influence.
研究成果
Moving dislocations play a key role in the directional transport of atoms under pulsed laser influence, confirmed by both simulation and experimental results. The presence of dislocations significantly increases atom mobility in the glide plane, while their absence in amorphous materials alters the observed electrical phenomena.
研究不足
The study focuses on specific conditions (strain rate, dislocation density) corresponding to laser effect in a Q-factor mode. The model simplifies real-world complexities by eliminating vacancies from consideration.
1：Experimental Design and Method Selection:
The study involves molecular dynamics simulation to investigate the atomic mechanism of mass transfer in FCC copper with moving dislocations and experimental recording of electrical signals induced by laser pulse irradiation of metal foils.
2：Sample Selection and Data Sources:
Metal foils of different crystal structures (polycrystalline and amorphous) are used. The simulation involves a model with 20192 atoms, 2 edge dislocations, and 1 self-interstitial atom.
3：List of Experimental Equipment and Materials:
Laser for pulse irradiation, metal foils (polycrystalline Mo and amorphous Fe
4：5Si5B9Cu1Nb3), X-ray examination equipment. Experimental Procedures and Operational Workflow:
Laser irradiation in non-stationary and quasi-stationary modes, recording of electrical signals, molecular dynamics simulation at 300K and 500K.
5：0K. Data Analysis Methods:
5. Data Analysis Methods: Analysis of diffusivity changes over time, comparison of electrical signals in different materials and laser modes.
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