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X-ray microtomography has been utilized for the observation of ductile fractures in an aluminum alloy with an Al/Al–Si dual phase structure. A procedure for analyzing a series of tomographic images is proposed for extracting the variation in the local crack-tip opening displacement (CTOD), and its feasibility is confirmed. Complicated crack growth behavior and the formation of uncracked ligaments...
In the present work, the cohesive energy and energy fluctuation of cluster models have been calculated using the extended Huckel method. The absolute values of the calculated results are not in agreement with experimental values but the relative changes in the magnitude are accurate enough for energetic discussions. The cohesive energy of a cluster changes with the change in lattice parameter and...
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