Linear complexions: Confined chemical and structural states at dislocations

TLDR

Steel’s strength and ductility depend on its structural defects, which are often modified to tailor material properties. Linear complexions are chemically and structurally distinct regions confined within a linear defect, isolated from the bulk by a surrounding dislocation layer. The authors created a new defect type—linear complexions—in magnesium‑rich steel, indicating a novel route to target defects and enhance alloy development. Kuzmina et al.

Abstract

Welcoming steel's new complexion Metals have a number of famous properties, including good strength and ductility. Controlling these properties frequently requires modifying the number and type of structural defects in a metal alloy. Kuzmina et al. produced a new type of defect, called a linear complexion, in magnesium-rich steel (see the Perspective by Kaplan). These complexions are chemically and structurally distinct regions located inside a linear defect and are isolated from the bulk by a layer of dislocations. The discovery suggests a new path for targeting defects and improving alloy development. Science , this issue p. 1080 ; see also p. 1059