研究目的
To demonstrate the utility of femtosecond laser machining for rapid, micro- and mesoscale sample preparation and to evaluate its influence on the microstructure and mechanical properties of materials.
研究成果
Femtosecond laser machining is a flexible, cost-effective, and reliable method for producing samples in a variety of geometries with minimal damage. It offers a viable solution for mesoscale mechanical testing and microstructure examination, bridging the gap between micro- and macroscale testing.
研究不足
The heat-affected zone (HAZ) from femtosecond laser machining, though minimal, can influence the local mechanical properties of materials. The study also notes the challenge of aligning specimens after cutting if removed from the holder.
1：Experimental Design and Method Selection:
The study utilized a custom-built femtosecond laser machining system for sample preparation, focusing on the mesoscale manufacturing of samples.
2：Sample Selection and Data Sources:
Single-crystal Cu micropillars and microscale tensile test specimens prepared from physical-vapor-deposited Cu and Ni foils were used.
3：List of Experimental Equipment and Materials:
A Coherent Monaco laser system, Newport Corporation’s XM ultra-precision linear motor stages, and Mitutoyo objective lenses were among the key equipment used.
4：Experimental Procedures and Operational Workflow:
The procedure involved cutting specimens with the femtosecond laser, followed by FIB cleanup if necessary, and then mechanical testing or microstructure examination.
5：Data Analysis Methods:
Stress-strain data from mechanical testing were analyzed to evaluate the influence of laser machining on material properties.
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