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research article

Enhanced strength and toughness of bulk ultrafine grained Cu by nacre-inspired lamellar structure

Li, Chenguang
•
Xie, Yuehuang
•
Zhang, Mingwei
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June 15, 2020
Journal Of Alloys And Compounds

An ultrafine grained (UFG) bulk Cu with a novel nacre-inspired lamellar structure containing nano-bridges and aligned nanopores at inter-lamellar interfaces was fabricated by consolidation of a nanocrystal-attached ultrathin Cu flake powder by spark plasma sintering with a relatively lower pressure (50 MPa) followed by hot rolling. It was discovered that the bulk UFG Cu with such a novel structure has both higher strength and higher toughness (static toughness) than its counterpart with a conventional UFG structure, despite the latter has a perceived better metallurgical quality as evidenced by a lower content of pores. The formation mechanism of the nacre-inspired microstructure in bulk Cu and its correlation with strengthening and toughening mechanisms were illustrated. (C) 2020 Elsevier B.V. All rights reserved.

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Type
research article
DOI
10.1016/j.jallcom.2020.154234
Web of Science ID

WOS:000519269300016

Author(s)
Li, Chenguang
Xie, Yuehuang
Zhang, Mingwei
Ruan, Mianmian
Wang, Jun
Liang, Jiamiao
Loge, Roland E.  
Zhang, Deliang
Date Issued

2020-06-15

Published in
Journal Of Alloys And Compounds
Volume

826

Article Number

154234

Subjects

Chemistry, Physical

•

Materials Science, Multidisciplinary

•

Metallurgy & Metallurgical Engineering

•

Chemistry

•

Materials Science

•

Metallurgy & Metallurgical Engineering

•

nacre-inspired

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lamellar structure

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ultrafine grained structure

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strength

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toughness

•

metal-matrix composites

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flake powder-metallurgy

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mechanical-properties

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nanolaminated composites

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graphene

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ductility

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deformation

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microstructure

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stress

•

strain

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LMTM  
Available on Infoscience
March 29, 2020
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/167708
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