Collaborative Research: Electromagnetic Peening Assisted Laser Micromachining (EPALM) - A Hybrid Micromachining Process with Enhanced Mechanical Properties

本合作研究计画的目的是探讨一种新颖的电磁强化辅助雷射微加工制程。 该项目的研究目标是了解加工过程中激光束辐射和电磁感应产生的压缩力同时作用下工件的响应，并验证在电磁喷丸辅助激光微加工过程中，电磁力的应用可以产生有益的喷丸效果，提高工件的机械性能的假设。将根据连续介质力学和麦克斯韦的电磁场理论建立一个物理模型，该模型可以预测和帮助理解这一过程的机制。 该模型将通过与实验进行比较来进行测试，该实验包括电磁喷丸辅助激光微加工过程的原位观察和加工工件的表征。加工速率，微观结构和残余应力将分别使用光学表面轮廓仪，扫描和透射电子显微镜和X射线衍射的特点。 还将测试机加工样品的疲劳性能。 如果成功的话，这项研究将提供一个更好的理解下的激光辐射和机电力的材料响应。电磁冲击效应有望提高激光加工工件的机械性能，并有可能提高产品质量。 这项技术是环保的，因为它不涉及有害化学物质。更好的产品质量和更长的使用寿命减少了再制造的需要，因此意味着更少的能源和材料消耗以及更少的废物产生。

The goal of this collaborative research project is to investigate a novel electromagnetic peening-assisted laser micromachining process. The research objectives of the project are to understand responses of a workpiece under the simultaneous action of laser beam radiation and compressive forces generated by electromagnetic induction during machining, and to test the hypothesis that, during the electromagnetic peening-assisted laser micromachining process, the application of electromagnetic forces can generate a beneficial peening effect, enhancing the mechanical properties of the workpiece. A physics-based model will be developed based on continuum mechanics and Maxwell's electromagnetic field theory, which can predict and help understand the process mechanism. The model will be tested by comparing with experiments that include both in-situ observations of the electromagnetic peening-assisted laser micromachining process and the characterization of the processed workpieces. The machining rate, microstructures and residual stresses will be characterized using an optical surface profilometer, scanning and transmission electron microscopes and X-ray diffraction respectively. The fatigue properties of machined samples will also be tested. If successful, this research will provide an improved understanding of material response under laser radiation and electromechanical forces. The electromagnetic peening effect is expected to enhance the mechanical properties of laser-machined workpieces, with a potential to improve product quality. This technology is environmentally friendly as it does not involve harmful chemicals. Better product quality and longer lifetime decrease the need for re-manufacturing and hence imply less energy and material consumption and less waste generation.