Constitutive description of Bulk Metallic Glass composites at high homologous temperatures

Kianoosh Marandi, T Prakash G. Thamburaja, V. P W Shim

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Experimental stress-strain responses of La-based in situ Bulk Metallic Glass (BMG) composites within the supercooled liquid region reveal initial post-yield hardening, followed by softening and subsequent strain-hardening. This behavior contrasts with that of monolithic La-based BMGs, which reach a steady stress level after an initial overshoot. XRD analysis of BMG composites shows the formation of intermetallic compounds during compressive deformation. These intermetallic compound formation/interactions are associated with storage of energy in the material and affect the stress-strain response. In this study, an elastic-viscoplastic, three-dimensional, finite deformation constitutive model is also established to describe the behavior of a recently developed La-based in situ BMG (La-Al-Cu-Ni) composite, within the supercooled liquid region, at ambient pressure and a range of strain rates. The constitutive model is incorporated into a finite element program (ABAQUS/Explicit) via a user-defined material subroutine. Numerical predictions are compared with compression test results on BMG composites cast in-house. The comparison shows that the model is able to describe the material behavior observed.

Original languageEnglish
Pages (from-to)151-164
Number of pages14
JournalMechanics of Materials
Volume75
DOIs
Publication statusPublished - 2014

Fingerprint

Metallic glass
metallic glasses
composite materials
Composite materials
Constitutive models
Intermetallics
intermetallics
subroutines
Temperature
compression tests
strain hardening
Subroutines
ABAQUS
Liquids
liquids
Strain hardening
hardening
softening
strain rate
Hardening

Keywords

  • Bulk Metallic Glass composites
  • Constitutive equation
  • Finite deformation
  • Finite element
  • Viscoplasticity

ASJC Scopus subject areas

  • Instrumentation
  • Materials Science(all)
  • Mechanics of Materials

Cite this

Constitutive description of Bulk Metallic Glass composites at high homologous temperatures. / Marandi, Kianoosh; G. Thamburaja, T Prakash; Shim, V. P W.

In: Mechanics of Materials, Vol. 75, 2014, p. 151-164.

Research output: Contribution to journalArticle

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