Oriented nucleation causing unusual texture transition during static recrystallization annealing in cold-rolled Mg–Zn–Gd alloys. (November 2020)

• Record Type: Journal Article
• Authors: Zhao, L.Y.; Yan, H.; Chen, R.S.; Han, En-Hou
• Is Part Of: Scripta materialia. Number 188(2020)
• Page Start: 200
• Page End: 205
• Publication Date: 2020-11
• Subjects: Texture -- Orientation -- Recrystallization -- Mg alloy -- Annealing; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2020.07.037
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: The static recrystallization, nuclei orientations, and texture evolution of cold-rolled Mg– Zn– Gd alloys during annealing were tracked by quasi-in-situ electron backscatter diffraction method. An unusual texture transition from "rolling direction (RD)-split" to "transverse direction (TD)-split" occurred and oriented nucleation was observed. Nuclei originating from boundaries of the parent grain with "RD" orientation mainly exhibited "TD" orientations, and showed preferential misorientation relationship around 62.5° (including basal axes <11–20>, <10–10>, <41–50> and <52–70>) with respect to the parent grain, which may be related to basal dislocations and low boundary energy. The cold-rolled "RD-split" texture transforms into annealed "TD-split" texture resulting from the preferential rotation along basal axes for about 62.5° of nuclei with respect to the parent grains in a Mg–Zn–Gd alloy: The cold-rolled "RD-split" texture transforms into annealed "TD-split" texture resulting from the preferential rotation along basal axes for about 62.5° of nuclei with respect to the parent grains in a Mg–Zn–Gd alloy. Image, graphical abstract