@inproceedings{3677a9772c9c44a3ac25f6bb750e5574,
title = "Study of dislocation walls evolution during spall in pure aluminum",
abstract = "The micro-structure of the spall plane of pure aluminum (99.9999%) was investigated in symmetric plate impact experiments. The aluminum targets were first heated at 450°C for 22 h for grain growth. The impacted targets were softly caught and collected for metallurgical analysis. It was found that at weak impacts with partial spall, voids with average size of 50±10 μm were developed along the grain boundaries. The grain sizes in the vicinity of the voids are 50-250 μm, in comparison with grain sizes of 400-1000 μm in other areas of the specimen, revealing grains splitting under dynamic tension. Transmission Electron Microscopy (TEM) and electron diffraction show parallel dislocation walls, that create a sub-grain micro-structure inside grains with (011) orientation to the beam. In grains with other orientations no dislocation walls or sub-grain structure were found. We also found out pile up of the dislocations by glide mechanism along <011> directions during the spall process.",
keywords = "aluminum, dislocation wall, high strain rate, pile up, spall",
author = "B. Glam and D. Moreno and S. Eliezer and D. Eliezer",
year = "2012",
month = jun,
day = "13",
doi = "10.1063/1.3686443",
language = "English",
isbn = "9780735410060",
series = "AIP Conference Proceedings",
pages = "987--990",
booktitle = "Shock Compression of Condensed Matter - 2011 - Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter",
note = "17th Biennial Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter, 2011 APS SCCM ; Conference date: 26-06-2011 Through 01-07-2011",
}