Title of article
High strain rate deformation and resultant damage mechanisms in ultrafine-grained aluminum matrix composites
Author/Authors
Vogt، نويسنده , , R. and Zhang، نويسنده , , Z. and Huskins، نويسنده , , Jonathan E. and Ahn، نويسنده , , Graham B. and Nutt، نويسنده , , S. and Ramesh، نويسنده , , K.T. and Lavernia، نويسنده , , E.J. and Schoenung، نويسنده , , J.M.، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2010
Pages
7
From page
5990
To page
5996
Abstract
Ultrafine-grained aluminum composites produced via cryomilling exhibited ultrahigh strength associated with considerable strain-to-failure (>14 pct.) at high strain rates (>103 s−1), but only limited strain-to-failure (∼0.75 pct.) at quasi-static strain rates (10−3 s−1). The mechanisms leading to these differences in behavior were investigated by systematic microstructural analysis of deformed and pre-deformed samples. Micro-flaw developments, including kinking, extensive axial splitting, and grain growth, were observed after high strain rate deformation, and the significance of these mechanisms is considered.
Keywords
Composites , Electron microscopy , dynamic compression , Axial splitting , Powder metallurgy , Aluminum alloys
Journal title
MATERIALS SCIENCE & ENGINEERING: A
Serial Year
2010
Journal title
MATERIALS SCIENCE & ENGINEERING: A
Record number
2162984
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