Abstract
The current study reports on the evolution of microstructure, variations in compressive properties and the ignition resistance of Mg through compositional variation, using alloying elements and nanoreinforcement. The alloys were designed with the use of a singular alloying element, Ca, and a binary alloying element, Ca+Sc, to develop Mg1Ca (wt.%) and Mg1Ca1Sc (wt.%) alloys. B4C nanoparticles were addedas the reinforcement phase in the Mg1Ca1Sc alloy to create the Mg1Ca1Sc/1.5B4C (wt.%) nanocomposite. The most effective compressive properties and level of ignition resistance was displayed by the developed composite. The grain sizes were significantly reduced in the Mg alloys (81%) and the composite (92%), compared with that of the Mg. Overall, the microstructural features (i.e., grain refinement, the formation of favorable intermetallic compounds, and hard reinforcement particles with an adequate distribution pattern) enhanced both the compressive strength and strain of the alloys and the composite. The ignition resistance was progressively increased from the alloys to the nanocomposite, and a peak ignition temperature of 752 °C was achieved in the composite. When compared with the ignition resistant of Elektron 21 (E21) alloy, which met the Federal Aviation Administration (FAA) requirements, the Mg1Ca1Sc/1.5B4C nanocomposite showed a higher specific yield strength and better ignition resistance, asserting it as a potential candidate material for lightweight engineering applications, including aerospace and defense sectors.
Highlights
Due to the concerns surrounding global warming in modern times, there is a significant need to reduce the global levels of carbon dioxide emissions
This study demonstrated the systematic development of Mg alloys, Mg1Ca and
In the Mg1Ca alloy, the uniform distribution of the secondary phases of Mg2 Ca was observed in its microstructure
Summary
Due to the concerns surrounding global warming in modern times, there is a significant need to reduce the global levels of carbon dioxide emissions. Given that magnesium has similar mechanical properties to aluminum, which is commonly used in aircrafts, this allows for a reduction in weight of the aircraft of up to 28% to 30%, should the aluminum components—such as those in the seat elements—be replaced with magnesium [1]. Due to the reduction in the weight of the aircraft, the aircraft would be able to consume less fuel per trip. This reduces carbon dioxide emissions, which reduces the carbon footprint of the aviation industry, and reduces the operating costs of the aviation industry by consuming less fuel. To be suited to targeted structural applications, the mechanical properties of pure
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