In-situ 3D imaging of structure and failure of materials using synchrotron radiation tomography
Rahman, K M Mostafijur
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.
DegreeMaster of Science (M.Sc.)
SupervisorSzpunar, Jerzy A.
CommitteeOdeshi, Akindele G.; Johnston, James; Babyn, Paul
Copyright DateMarch 2013