Insight into plasticity mechanisms in metallic glasses by means of a Brazilian test and numerical simulation

J. S. Brest, V. Keryvin, P. Longère, Y. Yokoyama

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Multiaxial and heterogeneous mechanical experiments, by means of the diametral compression test (Brazilian test), were carried out on Zr-based Bulk Metallic Glass. Attention was notably focused on obtaining the displacement field in the area of interest (large strains) employing a Digital Image Correlation device, in addition to the measurement of the usual global load-displacement curve. In order to reproduce the behaviour of the BMG at stake, several constitutive equations were considered with growing complexity: von Mises, Drucker-Prager (pressure dependence), free volume based model as well as a viscoplastic Coulomb-Mohr type model. The two latter were implemented as user-material in a Finite Element computation code. The results of these investigations including experiments and computational simulations are discussed.

Original languageEnglish
Pages (from-to)S236-S241
JournalJournal of Alloys and Compounds
Volume586
Issue numberSUPPL. 1
DOIs
Publication statusPublished - 2014

Keywords

  • Diametral compression
  • Digital image correlation
  • Finite element modelling
  • Metallic glasses
  • Plasticity
  • Shear bands

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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