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research article

Synchrotron strain measurements for in situ formed metallic glass matrix composites

Sansoz, F.
•
Molinari, J. F.  
•
Almer, J.
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2004
MRS Proceedings

We have examined the micromechanical behavior of in situ formed metallic glass composites by performing in situ high-energy synchrotron X-ray scattering during uniaxial compression. The load partitioning between the amorphous matrix and the reinforcing particles was examined by measuring the lattice strains in the crystalline particles during compressive loading. The crystalline particles yield in compression during loading followed by tensile yielding during unloading. The large elastic mismatch between the two phases leads to large residual strains after each loading cycle. The load partitioning was also examined with finite element modeling (FEM). The predicted von Mises effective stress in the crystalline particles from the FEM calculations compares well with the experimentally determined von Mises effective stress so long as the deformation is elastic in both particles and matrix. After the particles yield, the model predicts strain hardening of the particles that is not observed experimentally.

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Type
research article
DOI
10.1557/PROC-806-MM8.12
Author(s)
Sansoz, F.
Molinari, J. F.  
Almer, J.
Fan, C.
Hufnagel, T. C.
Ott, R. T.
Date Issued

2004

Published in
MRS Proceedings
Volume

806

Start page

361

End page

366

Subjects

X-Ray

Editorial or Peer reviewed

REVIEWED

Written at

OTHER

EPFL units
LSMS  
Available on Infoscience
November 23, 2010
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/58075
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