Quantitative assessment of the driving force for twin formation utilizing Nye tensor dislocation density mapping. (August 2016)

• Record Type: Journal Article
• Authors: Leff, A.C.; Taheri, M.L.
• Is Part Of: Scripta materialia. Volume 121(2016)
• Page Start: 14
• Page End: 17
• Publication Date: 2016-08
• Subjects: Twin boundaries -- Nye tensor -- Dislocation density; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2016.04.035
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Transmission electron microscopy was coupled with precession electron diffraction methods to determine the role of local defect distributions in the formation and growth behavior of twin nuclei. Three distinct cases were observed that are indicative of three separate formation mechanisms, two as the result of annealing and the third as a result of deformation. While all of the observed cases are consistent with the proposed mechanisms for twin formation found in literature, this study marks the first experimental evidence to support all three mechanisms occurring simultaneously in the same microstructure. Graphical abstract: