en.Wedoany.com Reported - Researchers at the U.S. Department of Energy's Oak Ridge National Laboratory (ORNL) have developed a 3D-printed aluminum alloy named DuAlumin-3D. Designed for high-temperature applications in aerospace and automotive components, the alloy contains cerium, nickel, and zirconium. From concept to the production of a full-scale prototype automotive piston, the development process took less than three years, compared to the typical 10 to 20 years required by traditional methods.
DuAlumin-3D achieves a manufacturing density exceeding 99.9%, exhibits the best known creep resistance among bulk aluminum alloys at 400°C, and demonstrates strong fatigue resistance at 350°C. Its operating temperature is approximately 150°C higher than that of traditional aluminum alloys, enabling its use in applications previously limited to titanium, steel, or nickel-based materials. Additionally, DuAlumin-3D weighs only half as much as titanium while offering nearly six times higher thermal conductivity.
In the aviation sector, replacing titanium with DuAlumin-3D in heat exchangers could reduce aircraft weight by hundreds of pounds per plane. According to ORNL estimates, full adoption across commercial fleets could save over 50 million gallons of aviation fuel annually, valued at more than $120 million. In automotive applications, substituting existing aluminum alloys with DuAlumin-3D could increase cylinder peak temperatures by 50 to 100°C, boosting engine thermal efficiency by up to 10%. If 10% of the U.S. automotive industry adopts this alloy, it could save approximately $3 billion in fuel costs each year.
In 2025, General Motors used DuAlumin-3D in its lightweight, high-efficiency medium-duty truck engine, a project that earned the R&D 100 Award. The research was supported by the U.S. Department of Energy's Advanced Materials and Manufacturing Technologies Office and the Vehicle Technologies Office.
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