Effect of twin boundary on crack propagation behavior in magnesium binary alloys; Experimental and calculation studies. (15th March 2017)

• Record Type: Journal Article
• Authors: Somekawa, Hidetoshi; Tsuru, Tomohito
• Is Part Of: Scripta materialia. Number 130(2017)
• Page Start: 114
• Page End: 118
• Publication Date: 2017-03-15
• Subjects: Magnesium alloy -- Twin boundary -- Solute atom -- First-principles -- Crack propagation; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2016.11.022
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: The impact of alloying elements on crack propagation and atomistic phenomenon at { 10 1 ¯ 2 }-type twin boundaries in magnesium was investigated via both experiments and calculations. The alloying elements clearly affected the crack propagation behavior. Cracks were difficult to propagate along matrix-deformation twinning interfaces in alloys that had high fracture toughness. In such magnesium alloys, the solute atoms, e.g., silver, manganese and zinc atoms, create adhesive interactions between magnesium atoms. Closed-shell and covalent-like bonding of these types of solute atoms would influence strong adhesion, which impedes the nucleation of a new surface at the twin boundary. Graphical abstract: