Effect of Powder Particle Concentration and Tool Electrode Material amid Zinc Powder-Mixed µEDM of Biocompatible Mg Alloy AZ91D
Source abstract
Abstract
Magnesium (Mg) alloys exhibit high strength and biocompatibility, coupled with a unique characteristic that is the ability to degrade over time. These characteristics of Mg alloys led to the development of several biodegradable medical implants such as screw, pin, and plate. Powder-mixed micro-electric discharge machining (PM-μEDM) was found to substantially improve the surface and metallurgical properties of biodegradable alloys and therefore, it was used in this study to investigate the machinability of Mg alloy AZ91D. PM-μEDM was performed at varying zinc (Zn) powder particle concentrations (0 to 8 g/l) using copper and brass tool electrodes. The effect of these input control variables on the machining time, dimensional deviation, and characteristics of the machined surface was experimentally examined. The machined surfaces were primarily analyzed by field-emission scanning electron microscope, energy-dispersive spectrometry, and x-ray diffraction (XRD). The findings showed a significant reduction in the machining time and dimensional deviation during PM-μEDM at 4 g/l powder particle concentration using the copper tool electrode. Moreover, the presence of resolidified debris, powder particles, and formed metal oxides and carbides in the recast layer, produced with the aid of the copper tool electrode at 4 g/l powder particle concentration, exhibited a considerable surface modification.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced Machining and Optimization Techniques · Magnesium Alloys: Properties and Applications · Aluminum Alloys Composites Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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