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Indentation plasticity of amorphous and partially crystallized metallic glasses

Published online by Cambridge University Press:  03 March 2011

L. Charleux ,
S. Gravier ,
M. Verdier ,
M. Fivel  and
J.J. Blandin
L. Charleux
Affiliation:
Institut National Polytechnique de Grenoble (INPG), Génie Physique et Mécanique des Matériaux (GPM2), UMR CNRS 5010, ENSPG, 38042 Saint-Martin d’Hères, France
S. Gravier
Affiliation:
Institut National Polytechnique de Grenoble (INPG), Génie Physique et Mécanique des Matériaux (GPM2), UMR CNRS 5010, ENSPG, 38042 Saint-Martin d’Hères, France
M. Verdier
Affiliation:
Institut National Polytechnique de Grenoble (INPG), Laboratoire de Thermodynamique et Physico-Chimie Métallurgique (LTPCM), UMR CNRS 5614, 38402 Saint-Martin d’Hères, France
M. Fivel
Affiliation:
Institut National Polytechnique de Grenoble (INPG), Génie Physique et Mécanique des Matériaux (GPM2), UMR CNRS 5010, ENSPG, 38042 Saint-Martin d’Hères, France
J.J. Blandin*
Affiliation:
Institut National Polytechnique de Grenoble (INPG), Génie Physique et Mécanique des Matériaux (GPM2), UMR CNRS 5010, ENSPG, 38042 Saint-Martin d’Hères, France
*
a) Address all correspondence to this author. e-mail: jean-jacques.blandin@gpm2.inpg.fr
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Abstract

Plastic behavior at room temperature of amorphous, partially crystallized, and fully crystallized Zr41.25Ti13.75Cu12.5Ni10Be22.5 Vitreloy 1 samples was investigated using instrumented indentation. Residual imprints were imaged using atomic force microscopy (AFM). Young’s modulus and hardness were estimated using the contact area derived from AFM imaging. It has been shown that the postmortem area measurement is useful to take into account the pileup effect. Indentation experiments performed with a conical tip were associated with parametric two-dimensional axisymmetric finite element modeling using a pressure-sensitive yield criterion. A two-parameter reverse analysis algorithm was used to probe both yield stress and pressure angle. Results showed that the amorphous alloy exhibits a yield stress and pressure angle in good agreement with literature and compressive tests, and that crystallization affects the pressure angle.

Keywords

AmorphousHardnessZr
Type
Articles
Information
Journal of Materials Research , Volume 22 , Issue 2 , September 2006 , pp. 525 - 532
Copyright
Copyright © Materials Research Society 2007

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