Three-dimensional effects of twinning in magnesium alloys. (15th April 2015)

• Record Type: Journal Article
• Authors: Hazeli, K.; Cuadra, J.; Streller, F.; Barr, C.M.; Taheri, M.L.; Carpick, R.W.; Kontsos, A.
• Is Part Of: Scripta materialia. Volume 100(2015)
• Page Start: 9
• Page End: 12
• Publication Date: 2015-04-15
• Subjects: Twinning -- Surface step -- Strain localization -- Digital image correlation (DIC) -- Local plasticity; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2014.12.001
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract : This article provides experimental evidence on the pronounced three-dimensional surface effects caused by tension twinning at early stages of plasticity of a magnesium alloy. To achieve this goal, multiscale mechanical testing was combined with strain field, texture and surface morphology quantification. The current investigation correlates crystallography-driven, grain-scale surface roughening to the spatially heterogeneous micro- and macrostrain. It was found that tension twinning causes considerable surface extrusions and intrusions across multiple grains that are directly related to severe strain inhomogeneities.