Compositional evolution of long-period stacking ordered structures in magnesium studied by atom probe tomography. (November 2018)

• Record Type: Journal Article
• Authors: Kim, Jin-Kyung; Guo, Wei; Choi, Pyuck-Pa; Raabe, Dierk
• Is Part Of: Scripta materialia. Number 156(2018)
• Page Start: 55
• Page End: 59
• Publication Date: 2018-11
• Subjects: Mg alloy -- Long-period-stacking-ordered structure -- Atom probe tomography -- Chemical composition; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2018.07.017
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Mg alloys containing long-period stacking ordered (LPSO) structures are strong and ductile compared to conventional Mg alloys. We study here the compositional evolution of LPSO structures in a Mg97Y2Zn1 (at.%) alloy upon annealing at 500 °C using atom probe tomography. In the material annealed for 2.5 h, the Zn/Y ratio of the building blocks in the interdendritic LPSO phase (0.73) is close to the stoichiometric composition of Y8 Zn6 L12 clusters while that in plate-type LPSO structures (0.66) slightly deviates from the ideal value. The Y/Zn enrichment in LPSO structures in the α-Mg matrix slightly decreases with increasing annealing time. Graphical abstract: Unlabelled Image