|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||Accelerated Materials Evaluation for Nuclear Applications Utilizing Irradiation and Integrated Modeling
||H-3: Damage Mitigation Strategies for Femtosecond Laser Machining of Micro-tensile Bars
||Sebastian Lam, Peter Hosemann, Jonathan Gregory Gigax, Quinn Mcculloch
|On-Site Speaker (Planned)
Currently FIB based sample preparation is the standard for micro-mechanical samples and TEM foils as well as residual stress measurements. However, larger and mesoscale samples can only be tackled using plasma based FIB machines or femto second laser ablation techniques. A femto second laser ablation system allows for extremely efficient material removal with sufficient precision for sample preparation with subsequent FIB based cleaning procedures for a fraction of the cost of a conventional or advanced FIB system.
The primary goal of this work is the development of micro-scale structures with the use of a femto second laser. Damage mitigation strategies such as the optimization of parameters like pulse frequency, fabrication velocity, and power are suggested to give a reduction in ablation as well as reduced cleaning times at a focused ion beam. The results given show that femtosecond laser preparation techniques hold great promise for rapid material analysis.