Neutron diffraction measurements of residual stress and mechanical testing of pressure sintered metal-ceramic composite systems

Karl Toppler*, Vladimir Luzin, Michael Saleh, Andrew Ruys, Kaveh Kabir, Dorji Chavara

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution

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Abstract

Functionally graded materials (FGMs) are composite materials which vary in phase composition, microstructure and properties over one or more dimensions. They are a good potential choice for nuclear reactor components as they can be engineered to effectively resist corrosion and radiation damage. In the case of a metal-ceramic FGM, they can mate the strength and ductility of a metal with the hardness and toughness of a ceramic. A series of composite samples of variable metal-ceramic ratios was manufactured by hot uniaxial pressing in cylinders. Bulk uniform samples of a certain composition were manufactured as a more efficient way of studying FGMs without the extreme gradient required in practical applications. Thermally and mechanically generated stresses, inherent in composites, frequently create conditions for micro-cracking development, depending on the material's micro-structural characteristics and the thermo-mechanical processing route. Bulk stress measurements in the prepared samples were carried out on the Kowari diffractometer on the OPAL reactor at ANSTO. Both phases - metal matrix and ceramic inclusions - were measured in both axial and lateral directions for full characterisation of the composite stress state. When compared against analytical evaluation, experimental results, for some samples, demonstrated significant stress relaxation with micro-cracking being the main suspect.

Original languageEnglish
Title of host publicationResidual Stresses 2016
Subtitle of host publicationICRS-10
EditorsThomas M. Holden, Ondrej Muránsky, Lyndon Edwards
Place of PublicationMillersville, PA
PublisherMaterials Research Forum LLC
Pages545-550
Number of pages6
ISBN (Electronic)9781945291173
ISBN (Print)9781945291166
DOIs
Publication statusPublished - 2017
Event10th International Conference on Residual Stresses (ICRS-10) - Sydney, Australia
Duration: 3 Jul 20167 Jul 2016

Publication series

NameMaterials research proceedings
PublisherMaterials Research Forum LLC
Volume2
ISSN (Print)2474-3941
ISSN (Electronic)2474-395X

Conference

Conference10th International Conference on Residual Stresses (ICRS-10)
CountryAustralia
CitySydney
Period3/07/167/07/16

Bibliographical note

Copyright the Author(s) 2017. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

Keywords

  • Functionally Graded Materials
  • FGM
  • Residual Stress
  • Metal-Ceramic Composite

Cite this

Toppler, K., Luzin, V., Saleh, M., Ruys, A., Kabir, K., & Chavara, D. (2017). Neutron diffraction measurements of residual stress and mechanical testing of pressure sintered metal-ceramic composite systems. In T. M. Holden, O. Muránsky, & L. Edwards (Eds.), Residual Stresses 2016: ICRS-10 (pp. 545-550). (Materials research proceedings; Vol. 2). Millersville, PA: Materials Research Forum LLC. https://doi.org/10.21741/9781945291173-92