A metallography and x-ray tomography study of spall damage in ultrapure Al

oleh: M. L. Qi, B. X. Bie, F. P. Zhao, C. M. Hu, D. Fan, X. X. Ran, X. H. Xiao, W. G. Yang, P. Li, S. N. Luo

Format: Article
Diterbitkan: AIP Publishing LLC 2014-07-01

Deskripsi

We characterize spall damage in shock-recovered ultrapure Al with metallography and x-ray tomography. The measured damage profiles in ultrapure Al induced by planar impact at different shock strengths, can be described with a Gaussian function, and showed dependence on shock strengths. Optical metallography is reasonably accurate for damage profile measurements, and agrees within 10–25% with x-ray tomography. Full tomography analysis showed that void size distributions followed a power law with an exponent of γ = 1.5 ± 2.0, which is likely due to void nucleation and growth, and the exponent is considerably smaller than the predictions from percolation models.