Abstract

The study investigates the effects of variables of laser-assisted turning (LAT) and conventional turning (CT) on machining performance of 45% volume fraction silicon carbide particle reinforced 2024 aluminum matrix composites (45 vol.% SiCp/2024Al). The process benefits of laser processing variables were analyzed by comparing the surface roughness, surface microstructure and residual stress. The variables in LAT are as follows: cutting speed, feed rate, and laser power. The experimental results show that under the same cutting parameters, the LAT outperforms the CT method by reducing the surface roughness value by up to 81.73%. Unlike in CT, LAT produces more residual compressive stress. Micro-structure analysis shows that there are no microcracks on the surface of the workpiece machined by LAT.

摘要

该研究调查了激光辅助车削（LAT）和常规车削（CT）变量对45％体积分数的碳化硅颗粒增强2024铝基复合材料（45％SiCp / 2024Al）的加工性能的影响。通过比较表面粗糙度，表面微观结构和残余应力，分析了激光加工变量的工艺优势。LAT中的变量如下：切割速度，进给速度和激光功率。实验结果表明，在相同的切削参数下，LAT的表面粗糙度值降低了81.73％，其性能优于CT方法。与CT不同，LAT产生更多的残余压应力。显微组织分析表明，经LAT加工的工件表面没有微裂纹。