Internal stresses in bulk metallic glass matrix composites

Ersan Üstündag, Danut Dragoi, Bjorn Clausen, Donald Brown*, Mark A M Bourke, Dorian K. Balch, David C. Dunand

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

Abstract

Composites consisting of a bulk metallic glass (BMG) matrix and metallic fibers or particulates have been shown to exhibit superior mechanical properties as compared to monolithic BMGs. To understand the role of reinforcements in this improvement, it is necessary to investigate the state of internal stresses in these composites. These stresses arise from the thermal expansion mismatch between the reinforcement and the matrix, as well as the elastic and plastic incompatibilities between the two phases. Neutron diffraction and synchrotron X-ray diffraction were used to measure these mismatch-induced stresses in BMG-matrix composites with various reinforcements: continuous W fibers, W or Ta particles, and dendritic, in-situ formed precipitates. The results are compared to numerical and analytical predictions of internal stresses.

Original languageEnglish (US)
Pages (from-to)L9.3.1-L9.3.6
JournalMaterials Research Society Symposium - Proceedings
Volume644
StatePublished - Dec 1 2001
EventSupercooled Liquid, Bulk Glassy and Nanocrystalline states of Alloys - Boston, MA, United States
Duration: Nov 27 2000Nov 30 2000

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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