| Autor: |
Menasche, David B., Lind, Jonathan, Shiu Fai Li, Kenesei, Peter, Bingert, John F., Lienert, Ulrich, Suter, Robert M. |
| Předmět: |
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| Zdroj: |
Journal of Applied Physics; 2016, Vol. 119 Issue 15, p154902-1-154902-7, 7p |
| Abstrakt: |
We report on the microstructural features associated with the formation of incipient spall and damage in a fully recrystallized, high purity copper sample. Before and after ballistic shock loading, approximately 0.8mm3 of the sample's crystal lattice orientation field is mapped using non-destructive near-field High Energy Diffraction Microscopy. Absorption contrast tomography is used to image voids after loading. This non-destructive interrogation of damage initiation allows for novel characterization of spall points vis-a-vis microstructural features and a fully 3D examination of microstructural topology and its influence on incipient damage. The spalled region is registered with and mapped back onto the pre-shock orientation field. As expected, the great majority of voids occur at grain boundaries and higher order microstructural features; however, we find no statistical preference for particular grain boundary types. The damaged region contains a large volume of Σ-3 (60°(111)) connected domains with a large area fraction of incoherent Σ-3 boundaries. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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