Characteristic dislocation substructure in 101¯2 twins in hexagonal metals. (15th January 2018)

• Record Type: Journal Article
• Authors: Wang, F.; Hazeli, K.; Molodov, K.D.; Barrett, C.D.; Al-Samman, T.; Molodov, D.A.; Kontsos, A.; Ramesh, K.T.; El Kadiri, H.; Agnew, S.R.
• Is Part Of: Scripta materialia. Number 143(2018)
• Page Start: 81
• Page End: 85
• Publication Date: 2018-01-15
• Subjects: Single crystal -- Twinning -- Dislocation -- Fault -- Plasticity; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2017.09.015
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Based on transmission electron microscopy results from pure Mg single crystal examined in the current work, and Mg alloys and other hexagonal metals in literature, a characteristic dislocation substructure inside 10 1 ¯ 2 twins is identified. Abundant non-basal [ c ] and ⟨ c + a ⟩ perfect dislocations, as well as basal I 1 stacking faults with widths on the order of 100 nm distributed preferentially in the vicinity of a twin boundary, with a low density zone in the middle of the twin. Considering the ubiquity of 10 1 ¯ 2 twins, this characteristic dislocation substructure should be considered in modeling of hexagonal metal alloy deformation. Graphical abstract: Image 1