The multi-axial deformation behavior of bulk metallic glasses at high homologous temperatures

R. Ekambaram, T Prakash G. Thamburaja, H. Yang, Y. Li, N. Nikabdullah

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

In this work, we study the behavior of a recently-developed Lanthanum-based bulk metallic glass under uniaxial and multi-axial stress-states using the constitutive model developed by Thamburaja and Ekambaram (2007). The material parameters in the constitutive model are fitted to match the stress-strain responses obtained from a set of simple compression experiments conducted at temperatures within the supercooled liquid region under a variety of strain rates spanning approximately three decades. With the material parameters calibrated, we show that the aforementioned constitutive model is able to accurately predict the force vs. displacement responses of representative experiments conducted under multi-axial stress-states at temperatures within the supercooled liquid region, namely three-point bending and the superplastic forming of a miniature gear component. In particular, the evolution of the specimen geometry during the deformation under multi-axial loading conditions are also well-predicted by the constitutive model.

Original languageEnglish
Pages (from-to)678-690
Number of pages13
JournalInternational Journal of Solids and Structures
Volume47
Issue number5
DOIs
Publication statusPublished - 1 Mar 2010
Externally publishedYes

Fingerprint

Metallic Glasses
Metallic glass
Constitutive Model
metallic glasses
Constitutive models
axial stress
Supercooled Liquid
superplastic forming
specimen geometry
Lanthanum
Temperature
Liquids
Strain Rate
liquids
lanthanum
strain rate
Experiment
Gears
Strain rate
Compaction

Keywords

  • Constitutive modeling
  • Experiments
  • Finite-element method
  • Metallic glass
  • Viscoplasticity

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)
  • Condensed Matter Physics
  • Applied Mathematics
  • Modelling and Simulation

Cite this

The multi-axial deformation behavior of bulk metallic glasses at high homologous temperatures. / Ekambaram, R.; G. Thamburaja, T Prakash; Yang, H.; Li, Y.; Nikabdullah, N.

In: International Journal of Solids and Structures, Vol. 47, No. 5, 01.03.2010, p. 678-690.

Research output: Contribution to journalArticle

@article{be9b1bd51e484583a73e3a54d2f1e658,
title = "The multi-axial deformation behavior of bulk metallic glasses at high homologous temperatures",
abstract = "In this work, we study the behavior of a recently-developed Lanthanum-based bulk metallic glass under uniaxial and multi-axial stress-states using the constitutive model developed by Thamburaja and Ekambaram (2007). The material parameters in the constitutive model are fitted to match the stress-strain responses obtained from a set of simple compression experiments conducted at temperatures within the supercooled liquid region under a variety of strain rates spanning approximately three decades. With the material parameters calibrated, we show that the aforementioned constitutive model is able to accurately predict the force vs. displacement responses of representative experiments conducted under multi-axial stress-states at temperatures within the supercooled liquid region, namely three-point bending and the superplastic forming of a miniature gear component. In particular, the evolution of the specimen geometry during the deformation under multi-axial loading conditions are also well-predicted by the constitutive model.",
keywords = "Constitutive modeling, Experiments, Finite-element method, Metallic glass, Viscoplasticity",
author = "R. Ekambaram and {G. Thamburaja}, {T Prakash} and H. Yang and Y. Li and N. Nikabdullah",
year = "2010",
month = "3",
day = "1",
doi = "10.1016/j.ijsolstr.2009.11.008",
language = "English",
volume = "47",
pages = "678--690",
journal = "International Journal of Solids and Structures",
issn = "0020-7683",
publisher = "Elsevier Limited",
number = "5",

}

TY - JOUR

T1 - The multi-axial deformation behavior of bulk metallic glasses at high homologous temperatures

AU - Ekambaram, R.

AU - G. Thamburaja, T Prakash

AU - Yang, H.

AU - Li, Y.

AU - Nikabdullah, N.

PY - 2010/3/1

Y1 - 2010/3/1

N2 - In this work, we study the behavior of a recently-developed Lanthanum-based bulk metallic glass under uniaxial and multi-axial stress-states using the constitutive model developed by Thamburaja and Ekambaram (2007). The material parameters in the constitutive model are fitted to match the stress-strain responses obtained from a set of simple compression experiments conducted at temperatures within the supercooled liquid region under a variety of strain rates spanning approximately three decades. With the material parameters calibrated, we show that the aforementioned constitutive model is able to accurately predict the force vs. displacement responses of representative experiments conducted under multi-axial stress-states at temperatures within the supercooled liquid region, namely three-point bending and the superplastic forming of a miniature gear component. In particular, the evolution of the specimen geometry during the deformation under multi-axial loading conditions are also well-predicted by the constitutive model.

AB - In this work, we study the behavior of a recently-developed Lanthanum-based bulk metallic glass under uniaxial and multi-axial stress-states using the constitutive model developed by Thamburaja and Ekambaram (2007). The material parameters in the constitutive model are fitted to match the stress-strain responses obtained from a set of simple compression experiments conducted at temperatures within the supercooled liquid region under a variety of strain rates spanning approximately three decades. With the material parameters calibrated, we show that the aforementioned constitutive model is able to accurately predict the force vs. displacement responses of representative experiments conducted under multi-axial stress-states at temperatures within the supercooled liquid region, namely three-point bending and the superplastic forming of a miniature gear component. In particular, the evolution of the specimen geometry during the deformation under multi-axial loading conditions are also well-predicted by the constitutive model.

KW - Constitutive modeling

KW - Experiments

KW - Finite-element method

KW - Metallic glass

KW - Viscoplasticity

UR - http://www.scopus.com/inward/record.url?scp=72449211880&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=72449211880&partnerID=8YFLogxK

U2 - 10.1016/j.ijsolstr.2009.11.008

DO - 10.1016/j.ijsolstr.2009.11.008

M3 - Article

AN - SCOPUS:72449211880

VL - 47

SP - 678

EP - 690

JO - International Journal of Solids and Structures

JF - International Journal of Solids and Structures

SN - 0020-7683

IS - 5

ER -