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. 2017 Nov 15;7:15628. doi: 10.1038/s41598-017-15229-4

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© The Author(s) 2017

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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General views of the polished surface of recovered specimen from shot S1235. First shock propagated from bottom of images towards top. (a) Backscattered electron image, showing the initially 1 mm thick Al2024 layer attenuated by flow associated with impact deformation to ~0.5 mm in this area near the left side-wall of the chamber. Regions of intermediate backscatter contrast mark a reaction zone up to ~0.1 mm wide with mean atomic number intermediate between the Al-rich and Ni-rich starting materials. (b) X-ray intensity map of the same general area, using the color scheme shown at lower left. Voids in the sample appear cyan due to Carbon in the epoxy fill. The brown regions mark the mixed layers.