Elemental segregation to twin boundaries in a MnAl ferromagnetic Heusler alloy

Palanisamy, D. and Raabe, D. and Gault, B.

Volume: 155 Pages: 144-148
DOI: 10.1016/j.scriptamat.2018.06.037
Published: 2018

Electron microscopy and atom probe tomography were combined to investigate the crystallography and chemistry of a single twin boundary (TB) in a rare-earth-free ferromagnetic MnAl Heusler alloy. The results establish a significant segregation of Mn along the twin boundaries. An enrichment of approx. ~8 at.% Mn was measured along the twin boundary with a confined depletion outside the twin boundary, suggesting short range solute diffusion occurring during massive transformation. © 2018 Elsevier Ltd

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