Nanoscale alloy redesign tackles cold brittleness for potential deep-space and deep-sea applications

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Add to Preferred Sources Chen and his team pioneered an innovative "negative-curvature interface" strategy in alloys. The graphic illustrates how negative-curvature interfaced nanoprecipitates harden the novel microstructures of the designed alloy. Credit: Nature Communications (2026). DOI: 10.1038/s41467-026-74629-1 Metallic materials used in extremely cold environments must maintain high strength, ductility and fracture toughness to support applications in aerospace, clean energy, superconducting systems and deep-space exploration. However, traditional alloys often suffer performance degradation at ultralow temperatures because of the long-standing trade-off between strength, ductility and toughness. Although metals may become stronger at lower temperatures, they can also become more brittle and prone to fracture.