Multiscale Deformation and Dynamic Recrystallization in Shock Deformed Aluminum Alloy

Yuri Meshcheryakov; Alexandre Divakov; Natali Zhigacheva; Boris Barakhtin

doi:10.4028/www.scientific.net/MSF.794-796.815

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HomeMaterials Science ForumMaterials Science Forum Vols. 794-796Multiscale Deformation and Dynamic...

Multiscale Deformation and Dynamic Recrystallization in Shock Deformed Aluminum Alloy

Abstract:

Two regimes, equilibrium and non-equilibrium interaction of shock wave and inner structure of solid are studied. The theoretical analysis of the regimes is carried out by using the concept of the meso-macro momentum exchange. As a test material for the experiments, D16 Al alloy is taken, firstly because of its initial heterogeneity in equilibrium regime of dynamic straining and, secondly, due to increasing heterogeneity in non-equilibrium regime. Shock tests of D16 Al alloy within impact velocity range of 85÷450 m/s evidence that maximum dynamic strength is realized under conditions: (i) equilibrium regime of meso-macro momentum exchange, (ii) velocity defect equals to mean velocity variation. In non-equilibrium regime, the shock-induced dynamic recrystallization occurs, which is investigated with the metallography and X-ray analysis.

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Periodical:

Materials Science Forum (Volumes 794-796)

Pages:

815-820

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.794-796.815

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Online since:

June 2014

Authors:

Yuri Meshcheryakov*, Alexandre Divakov, Natali Zhigacheva, Boris Barakhtin

Keywords:

Dynamic Recrystallization (DRX), Interscale Momentum Exchange, Mesoscale, Shock Wave

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