Abstract
Extremely high strength can only be achieved through the use of magnesium alloys devoid of rare earth elements, as well as the development of a microstructure for a nanocrystalline matrix and the dispersion of stable nanoscale precipitates. This study used mechanical milling and hot pressing to create a bulk nanocrystalline magnesium alloy. The structure, densification, and mechanical characteristics of hot pressed samples were studied. The magnesium matrix had an average grain size of 76 nm after hot pressing at 723 K for 60 min. Particles as small as 10 nm in diameter of nanoscale Ti3Al precipitates were discovered. It was then subjected to various annealing treatments at 573 K. The material's tensile and plastic properties both improved noticeably. After 80 h of annealing at 573 K, its yield strength, compressive strength, strain, and stiffness were all greater than 498 Mpa. Grain boundary reinforcement, the Orowan outcome, and load transmission all contributed to a total of 64, 33, and 3percent of the total respectively. The use of nanocrystalline magnesium and nanoscale Ti3Al precipitates results in extremely high strength.
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