X-ray micro-tomography has become an increasingly important technique for
characterizing the 3D microstructure of materials. This became possible mainly because spatial
resolution of the imaging detectors has improved, and synchrotron radiation is more accessible
for micro-tomography imaging.
In the presented project a novel experimental system has been designed and built at
Biomedical Imaging and Therapy (BMIT)’s 05B1-1 beamline at Canadian Light Source (CLS).
This system allows imaging structural transformation during in-situ loading experiments under
tensile stress. The system was tested and several examples illustrating the application of this
experimental system are presented.
The system has been used to image the structure of porous aluminum and the size and
distribution of pores was analyzed. The system was also used to image the structure of
Al/Al2O3/TiC hybrid composites manufactured by accumulated roll bonding (ARB) process and
this allowed analyzing the size distribution of reinforcing particles and voids. It was further
demonstrated that in-situ imaging of deformation can be used to image consecutive stages of
structural transformation (change in volume, change of position of reinforcing particles, creation
of voids etc.) in aluminum alloy and aluminum composites during application of tensile stress
and to illustrate the nucleation of failure.
This system of dynamic imaging at BMIT-BM at CLS can help in better description of
structural transformation associated with the application of stress and will contribute to better
understanding of the failure mechanisms of different types of materials during straining.
| Identifer | oai:union.ndltd.org:USASK/oai:ecommons.usask.ca:10388/ETD-2013-03-971 |
| Date | 2013 March 1900 |
| Contributors | Szpunar, Jerzy A. |
| Source Sets | University of Saskatchewan Library |
| Language | English |
| Detected Language | English |
| Type | text, thesis |
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