In-situ and ex-situ investigation of deformation behaviors of a dual-phase Mg−Ni−Y alloy. (15th March 2023)

• Record Type: Journal Article
• Authors: Liu, Cheng; Yang, Xiaohua; Peng, Jianchao; Liu, Bin; Luo, Qun; Li, Qian; Chou, Kuo-Chih
• Is Part Of: Scripta materialia. Number 226(2023)
• Publication Date: 2023-03-15
• Subjects: Magnesium alloys -- Transmission electron microscopy -- Kinking -- Stacking fault; Mg alloys magnesium alloys -- TEM transmission electron microscopy; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2022.115264
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: The relationship between the deformation behaviors of the bulk α-Mg and Long Period Stacking Ordered (LPSO) phases is important for the design of high-strength alloys. In this work, the deformation behaviors of dual-phase Mg alloy which contains α-Mg and 18R-LPSO phases are investigated by in-situ tensile scanning electron microscopy and ex-situ transmission electron microscope. The results show that the 18R phase accounting for 11.3 vol.% provides 23.0% deformation of the overall alloy. At the early stage of deformation, the stacking faults are bent to coordinate twinning deformation through the slip of basal dislocations in the α-Mg matrix, while the kinking deformation 18R induces the kinking deformation of Mg slices. At the end of deformation, large numbers of T2 -type stacking faults are generated. These deformation behaviors improve the ductility of the alloy. This work provides a novel strategy to design the high strength and good ductility dual-phase Mg alloys. Graphical abstract: Image, graphical abstract