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

合作研究：电磁喷丸辅助激光微加工 (EPALM) - 一种具有增强机械性能的混合微加工工艺

• 批准号: 1000226
• 负责人: Gary Cheng
• 金额: $ 17万
• 依托单位: Purdue University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-09-15 至 2014-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1000226&HistoricalAwards=false
• 关键词: Collaborative; Research; Electromagnetic; Peening; Assisted

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.

该合作研究项目的目标是研究一种新型电磁喷丸辅助激光微加工工艺。 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，并检验以下假设：在电磁喷丸辅助激光微加工过程中，应用电磁力的作用可以产生有益的喷丸效果，增强工件的机械性能。将基于连续介质力学和麦克斯韦电磁场理论开发基于物理的模型，该模型可以预测并帮助理解过程机制。 该模型将通过与包括电磁喷丸辅助激光微加工过程的现场观察和加工工件的表征的实验进行比较来进行测试。将分别使用光学表面轮廓仪、扫描和透射电子显微镜以及 X 射线衍射来表征加工速率、微观结构和残余应力。 机加工样品的疲劳性能也将被测试。 如果成功，这项研究将加深对激光辐射和机电力下材料响应的理解。电磁喷丸效应有望增强激光加工工件的机械性能，并有可能提高产品质量。 该技术不涉及有害化学物质，因此对环境友好。更好的产品质量和更长的使用寿命减少了再制造的需要，从而意味着更少的能源和材料消耗以及更少的废物产生。