ARTICLE | doi:10.20944/preprints201801.0183.v6
Subject: Chemistry And Materials Science, Materials Science And Technology Keywords: TiAl alloys; dislocation; twinning; nanoindentation; ECCI
Online: 12 February 2018 (17:07:45 CET)
In this work, plastic deformation was locally introduced at room temperature by nanoindentation on a γ-TiAl based alloy. Comprehensive analyzes of microstructures were performed before and after deformation. In particular, the Burgers vectors, the line directions and the mechanical twinning systems were studied via accurate electron channeling contrast imaging. Accommodation of the deformation are reported and a scenario is proposed. All features help to explain the poor ductility of the TiAl based alloys at room temperature.