From Powders to Alloys: A Study of the Mechanical Alloying Process and Sintering

This study explores the intricacies of mechanical alloying, aiming to unlock its potential in modern engineering. It investigates the impact of milling duration, ball-to-powder ratio, and sintering temperature on the microstructure and mechanical properties of Al-7Zn-2.5Mg-2.5Cu alloy and Al7075 alloy. Mechanical alloying can produce alloys with exceptional hardness, strength, and ductility, while grain size can be controlled by adjusting milling parameters. Experimental techniques like X-Ray diffraction and transmission electron microscopy reveal microstructural changes during mechanical alloying, aiding in understanding metastable phases and element segregation, which influence the alloy’s properties. Sintering, the subsequent consolidation step, determines final properties, with a trade-off between grain size and mechanical qualities observed at different sintering temperatures. This trade-off presents an intriguing avenue for developing materials with optimal properties. The study also explores potential applications of mechanical alloying across industries, including aerospace, biomedical, and energy. These unique mechanical alloys are attractive for various uses, from structural to catalytic and magnetic materials. They have the potential to revolutionize industries and drive technological advancements.