Engineering ordered two-dimensional defect phases to strengthen structural alloys.

Predeformation and aging create dense networks of ordered defect phases in alloys, increasing room-temperature strength by over 200 MPa and tripling creep resistance.

• Why it matters: Controlling defect structures in alloys is crucial for enhancing their mechanical properties, but current methods lack precise control over defect density, stability, and chemistry.
• What they did: The study applied a combined predeformation and aging process to a cobalt-nickel-based superalloy and a cobalt-chromium-tungsten alloy, producing ordered defect-confined phases confirmed by electron microscopy and simulations.
• The result: This engineered defect architecture significantly strengthens the alloys and maintains shearability, suggesting a new approach for designing durable, high-performance structural materials.