A new insight into the beta′′′ structure: Three categories of configurations between beta′ precipitates in aged binary Mg-Nd alloy. (November 2019)

• Record Type: Journal Article
• Authors: Tan, J.; Dong, Y.; Zhang, H.X.; Sun, Y.H.; Sun, B.Z.; Qi, Y.
• Is Part Of: Scripta materialia. Number 172(2019)
• Page Start: 130
• Page End: 134
• Publication Date: 2019-11
• Subjects: Magnesium alloys -- Scanning transmission electron microscopy -- Metastable phaseβF′ − βF′ configurations -- Transformation; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2019.07.014
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: The morphology and the structure of β F ′ metastable phase were studied in aged binary MgNd alloy by atomic-resolution scanning transmission electron microscopy (STEM). The proposed three categories of β F ′ − β F ′ configurations are respectively aligned, staggered and inserted configurations, which can explain well the β ′′′ structure proposed previously based on the experimental images and constructed models. The inserted β F ′ − β F ′ configuration is the most important one during the structural evolution of aging, which play a crucial role in the in-situ transformation from the D 019 -like to the quasi- β 1 structures. Graphical abstract: According to experimental images and constructed models, the proposed three types of β F ′ − β F ′ configurations are as follows: Aligned β F ′ − β F ′ configuration–I, staggered β F ′ − β F ′ configuration–II and inserted β F ′ − β F ′ configuration–III including partial and full inserted types.Unlabelled Image