On the deformation morphology of bulk metallic glasses underneath a Vickers indentation

V. Keryvin (1) , X. D. Vu (1) , V. H. Hoang (1) , Jun Shen (2)

1 LARMAUR - LAboratoire de Recherche en Mécanique Appliquée
2 School of Materials Science and Engineering

The techniques commonly used for observing the deformation mechanisms underneath a Vickers indentation in metallic glasses (chemical etching, bonded interface) induce artefacts such as cracks or semi-circular shear-bands. We propose an alternative technique based on the propagation of indentation corner cracks through a pre-existing imprint, which is possible in metallic glasses such as iron-based compositions. With this procedure, only radial shear-bands are observed. Comparisons between the chemical etching or the bonded interface techniques and the new technique are made. (C) 2010 Elsevier B.V. All rights reserved.

Mots clés: Metallic glasses; Amorphous; Mechanical properties; Strain; High pressures; Indentation; Hardness

Domaines: Mécanique [physics.med-ph]

V. Keryvin, X. D. Vu, V. H. Hoang, Jun Shen. On the deformation morphology of bulk metallic glasses underneath a Vickers indentation. Journal of Alloys and Compounds, 2010, 504 (1), pp.S41-S44. ⟨10.1016/j.jallcom.2010.02.073⟩. ⟨hal-00830344⟩