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Free keywords:
Aluminum alloys; Atoms; Glass; High resolution transmission electron microscopy; Iron alloys; Metallic glass; Probes; Ternary alloys; Transmission electron microscopy; Yttrium alloys, Atom probe tomography; Chemical exchange; Concentration fluctuation; Density variations; Glassy matrices; Metallic glass ribbons; Re-distribution, Shear bands
Abstract:
A density variation in shear bands visible by electron microscopy is correlated with compositionally altered locations measured by atom-probe tomography in plastically-deformed Al 85.6 Y 7.5 Fe 5.8 metallic-glass ribbons. Two compositionally distinct regions are identified along shear bands, one is Al-rich (~92 at.), the other is Al-depleted (~82.5 at.) and both regions show marginal concentration fluctuations of Y and Fe. The elemental re-distribution is observed within shear bands only, and no chemical exchange with the surrounding glassy matrix is observed. © 2019