Elasto-plastic load transfer in bulk metallic glass composites containing ductile particles

Dorian K. Balch, Ersan Üstündag, David C. Dunand*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)

Abstract

In-situ diffraction experiments were performed with high-energy synchrontron X-rays to measure strains in crystalline reinforcing particles (5 and 10 vol. pct W or 5 vol. pct Ta) of bulk metallic glass composites. As the composites were subjected to multiple uniaxial tensile load/unload cycles up to applied stresses of 1650 MPa, load transfer from the matrix to the stiffer particles was observed. At low applied loads, where the particles are elastic, agreement with Eshelby elastic predictions for stress partitioning between matrix and particles is found, indicating good bonding between the phases. At high applied loads, departure from the elastic stress partitioning is observed when the particles reach the von Mises yield criterion, as expected when plasticity occurs in the particles. Multiple mechanical excursions in the particle plastic region lead to strain hardening in the particles, as well as evolution in the residual strain state of the unloaded composite.

Original languageEnglish
Pages (from-to)1787-1797
Number of pages11
JournalMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume34 A
Issue number9
DOIs
Publication statusPublished - Sept 2003
Externally publishedYes

Fingerprint

Dive into the research topics of 'Elasto-plastic load transfer in bulk metallic glass composites containing ductile particles'. Together they form a unique fingerprint.

Cite this