工程化有序二维缺陷相强化结构合金

two- dimensional defect phases to strengthen structural alloys Andreas Bezold1*†, Manuel Köbrich2†, Jan Vollhüter2, Longsheng Feng3,4, Lukas Amon2, Nicolas Karpstein5, Yunzhi Wang1, Erdmann Spiecker5, Mathias Göken2, Michael J. Mills1, Steffen Neumeier2 Defects in crystals are usually considered to be consequences of deformation, but they can also be engineered as strengthening features. Planar defects can strengthen structural alloys but usually form only during deformation or service, limiting control over their density, stability, and chemistry. We show that predeformation followed by aging can convert such defects into a designed architecture of ordered defect phases. In a singlecrystal cobalt- nickel–based superalloy and a polycrystalline cobalt- chromium- tungsten alloy, this treatment creates dense networks of coherent, atomically thin, ordered defect–confined phases. …