Plastic deformation of polycrystalline alumina introduced by scaled-down drop-weight impacts

James Wade; Stuart Robertson; Ying Zhu; Houzheng Wu

doi:10.1016/j.matlet.2016.04.023

Plastic deformation of polycrystalline alumina introduced by scaled-down drop-weight impacts

James Wade, Stuart Robertson, Ying Zhu, Houzheng Wu^*

^*Corresponding author for this work

Loughborough University

Research output: Contribution to journal › Article › peer-review

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Abstract

We present our findings after scaled-down drop-weight tests, performed under relatively low loading conditions and employing a small-scale spherical indenter as a projectile, to boost the strain rate and energy density of the impact, resulted in the generation of a cavity of measurable depth on the surface of a pure, fully dense, alumina ceramic. We demonstrate that activated dislocations are a main contributor in the formation of the residual impression with an estimated maximum density of ~4.02×10¹⁴ m^-2.

Original language	English
Pages (from-to)	143-147
Number of pages	5
Journal	Materials Letters
Volume	175
Early online date	4 Apr 2016
DOIs	https://doi.org/10.1016/j.matlet.2016.04.023
Publication status	Published - 15 Jul 2016

Keywords

Dislocations
Drop-weight impact
Plastic deformation
Polycrystalline alumina

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PLASTIC DEFORMATION OF POLYCRYSTALLINE ALUMINA INTRODUCEDAccepted author manuscript, 453 KB

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AU - Wu, Houzheng

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AB - We present our findings after scaled-down drop-weight tests, performed under relatively low loading conditions and employing a small-scale spherical indenter as a projectile, to boost the strain rate and energy density of the impact, resulted in the generation of a cavity of measurable depth on the surface of a pure, fully dense, alumina ceramic. We demonstrate that activated dislocations are a main contributor in the formation of the residual impression with an estimated maximum density of ~4.02×1014 m-2.

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KW - Plastic deformation

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JF - Materials Letters

ER -

Plastic deformation of polycrystalline alumina introduced by scaled-down drop-weight impacts

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Keywords

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