Elemental segregation to twin boundaries in a MnAl ferromagnetic Heusler alloy. (October 2018)

• Record Type: Journal Article
• Authors: Palanisamy, D.; Raabe, D.; Gault, B.
• Is Part Of: Scripta materialia. Number 155(2018)
• Page Start: 144
• Page End: 148
• Publication Date: 2018-10
• Subjects: MnAl Heusler alloy -- Massive transformation and twins -- Solute segregation -- Transmission electron microscopy (TEM) -- Atom probe tomography (APT); Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2018.06.037
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: 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. Graphical abstract: Unlabelled Image