Comment: On the nature of "unconventional twins" in magnesium. (February 2023)

• Record Type: Journal Article
• Authors: Lin, F.X.; Wu, C.C.; Fang, X.Y.; Liu, H.; Nie, J.F.
• Is Part Of: Scripta materialia. Number 224(2023)
• Publication Date: 2023-02
• Subjects: Twin -- Magnesium -- EBSD; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2022.115137
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: "Unconventional twins" were reported by Cayron and Logé [1] to form in plastically deformed magnesium. They were used to show the occurrence of a new twinning mode which was used to argue for reconsidering the theory of deformation twinning that is based on simple shear [1], and to support a concept of axial weak twins [2]. Our paper demonstrates the incorrect interpretation of their electron back-scatter diffraction map in [1], and that the so-called "unconventional" twins are just conventional extension twins that have impinged with each other. Therefore, the so-called habit plane of the "unconventional twins" is a boundary resulting from impingement of these two different variants of the extension twin, and is therefore not expected to be invariant.