Magnesium & Mango Leaves: New Alloy Boosts Impact Resistance by 54%

Scientists at the National University of Singapore have developed a novel material combining magnesium with recycled mango leaf powder, significantly enhancing the metal’s vibration-damping capabilities. The research, published in the journal Metals, demonstrates a 54% increase in damping capacity compared to pure magnesium, potentially opening new avenues for lightweight and sustainable materials in industries ranging from automotive to aerospace.

Magnesium, the lightest structural metal, is already valued for its high strength-to-weight ratio, machinability and natural abundance. It’s a key component in aluminum alloy beverage cans, accounting for roughly 5% of their composition, and increasingly utilized in automotive parts to reduce vehicle weight and improve fuel efficiency. The new alloy aims to further expand magnesium’s applications by improving its ability to absorb and dissipate energy from vibrations.

The research team, led by scientists seeking to minimize waste and enhance material performance, utilized fallen mango leaves – an agricultural byproduct – as the additive. Leaves were dried using a conventional microwave oven, then ground into a fine powder using a ball mill and further dried in a furnace. This powder was then mixed with magnesium, comprising just 5% of the final composition.

During a process called sintering, which uses heat and pressure to consolidate metal powders, the leaf powder vaporized, leaving behind microscopic pores within the magnesium structure. Contrary to initial concerns, these pores actually improved the material’s shock absorption properties. Researchers found that an extrusion temperature of 350 degrees Celsius yielded the optimal balance of properties.

“The performance mechanical showed a trade-off with decreasing extrusion temperature: lower temperatures led to greater porosity, which reduced hardness, compressive strength, and ductility,” the authors wrote in their published study. Higher temperatures, however, risked converting the leaf powder into carbon, potentially increasing corrosion.

According to a comparative analysis of metals published by RJC Mold in December 2025, titanium boasts the highest melting point (1668°C) and excellent strength-to-weight ratio, but is significantly more expensive than magnesium. Steel, while strong and rigid, is considerably heavier. Aluminum offers a good balance of weight and strength, but is less durable than titanium or steel. Copper is softer and less suitable for high-stress applications. Magnesium, despite being less rigid than steel, offers a unique combination of lightness and reasonable strength.

The researchers emphasize that their findings demonstrate the potential of integrating natural biomass into metallic systems to create lightweight and sustainable materials. Further research will focus on optimizing the process and exploring other biomass sources to enhance material performance and minimize limitations. The team has not yet announced plans for scaling up production or commercialization of the new alloy.