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ORNL Unveils New High-Temperature Additive Manufacturing Aluminum Alloy DuAlumin-3D
2026-06-04
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Impact score: 42
Oak Ridge National Laboratory (ORNL) has developed a new high-temperature 3D-printable aluminum alloy, DuAlumin-3D, which maintains required mechanical properties at 400°C, achieves a density of 99.9%, and exhibits excellent fatigue strength at 350°C. It weighs only half as much as titanium and has approximately six times the thermal conductivity of titanium. When used in heat exchangers, it can reduce aircraft weight by hundreds of pounds per plane, saving the entire fleet over 50 million gallons of aviation fuel annually ($120 million). General Motors has already tested the alloy in its medium-duty diesel truck engines for printing pistons. The alloy contains cerium, nickel, and zirconium, and forms self-generated heat-resistant nanoscale strengthening phases during printing, solving cracking issues common in traditional high-strength aluminum alloy additive manufacturing.
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ORNL公布新型高温增材制造铝合金DuAlumin-3D
美国橡树岭国家实验室（ORNL）开发出新型高温3D打印铝合金DuAlumin-3D，该材料可在400°C下保持所需力学性能，致密度达99.9%，350°C下疲劳强度优异。其重量仅为钛的一半，导热率约为钛的6倍。用于制造热交换器时，单架飞机可减重数百磅，全机队年节约航空燃油超5000万加仑（1.2亿美元）。通用汽车已在其中型柴油卡车发动机中试用该合金，用于打印活塞。该合金含铈、镍和锆，在打印过程中自生耐热纳米强化相，解决了传统高强铝合金增材制造易开裂的难题。