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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10.1016/j.matlet.2016.04.023

PLASTIC DEFORMATION OF POLYCRYSTALLINE ALUMINA INTRODUCEDAccepted author manuscript, 453 KB

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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 \textasciitilde{}4.02×1014 m-2.",

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AU - Zhu, Ying

AU - Wu, Houzheng

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N2 - 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.

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.

KW - Dislocations

KW - Drop-weight impact

KW - Plastic deformation

KW - Polycrystalline alumina

UR - https://www.scopus.com/pages/publications/84965147122

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DO - 10.1016/j.matlet.2016.04.023

M3 - Article

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VL - 175

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JO - Materials Letters

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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