Resistance of submicrocrystalline aluminum alloys to high-rate deformation and fracture after dynamic channel angular pressing

被引：0
作者：
I. G. Brodova
A. N. Petrova
S. V. Razorenov
E. V. Shorokhov
机构：
[1] Russian Academy of Sciences,Institute of Metal Physics, Ural Branch
[2] Russian Academy of Sciences,Institute of Problems of Chemical Physics
[3] National Research Tomsk State University,Russian Federal Nuclear Center
[4] Zababakhin All-Russian Scientific Research Institute of Technical Physics,undefined
来源：
The Physics of Metals and Metallography | 2015年 / 116卷
关键词：
submicrocrystalline structure; aluminum alloys; impact compression; spall strength; dynamic elastic limit;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
A comparative study of the deformation behavior of submicrocrystalline (formed by dynamic channel angular pressing) and coarse-grained commercial aluminum alloys (AMts and V95), and commercial aluminum A7 has been performed under impact compression conditions. Dynamic elastic limit (Hugoniot elastic limit) σHEL, yield strength Y, and spall strength σsp at a deformation rate of (1.2–3) × 105 s−1 were determined by analyzing the experimental velocity profiles of the free surface of samples. It has been found that the dynamic elastic limit and yield strength increase after all the materials studied have transformed into a submicrocrystalline state (crystallite size of 200–700 nm). Submicrocrystalline alloy V95 has the highest value of Y and submicrocrystalline aluminum A7 has the lowest one. The effect of grain size on spall strength is ambiguous. The values of σsp for submicrocrystalline alloys are 1.32–1.36 GPa. The submicrocrystalline V95 alloy and commercial A7 aluminum demonstrate a decrease in the spall strength, whereas the spall strength of the alloy AMts slightly increases with decreasing grain size.
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页码：519 / 526
页数：7
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