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Deformation-controlled design of metallic nanocomposites

Deformation-controlled design of metallic nanocomposites
Deformation-controlled design of metallic nanocomposites
Achieving the theoretical strength of a metallic alloy material is a demanding task that usually requires utilizing one or more of the well-established routes: (1) Decreasing the grain size to stop or slow down the dislocation mobility, (2) adding external barriers to dislocation pathways, (3) altering the crystal structure, or (4) combining two of the previous discrete strategies, that is, implementing crystal seeds into an amorphous matrix. Each of the outlined methods has clear limitations; hence, further improvements are required. We present a unique approach that envelops all the different strength-building strategies together with a new phenomenon–phase transition. We simulated the plastic deformation of a Zr–Nb nanolayered alloy using molecular dynamics and ab initio methods and observed the transition of Zr from hexagonal close-packed to face-centered cubic and then to body-centered cubic during compression. The alloy, which was prepared by magnetron sputtering, exhibited near-theoretical hardness (10.8 GPa) and the predicted transition of the Zr structure was confirmed. Therefore, we have identified a new route for improving the hardness of metallic alloys.
nanolayered materials, metallic alloy, phase transition, interfaces, coating
1944-8244
46296-46302
Yavas, Hakan
18215fa7-989a-4abe-ba19-4a624fb9f272
Fraile, Alberto
a5360fc0-5002-4410-85fc-d0af55e36b8a
Huminiuc, Teodor
b743b7ba-7541-4f2e-b4be-ea25b088e4c6
Sen, Huseyin Sener
bb372413-c42d-4a9b-8337-bc27ee739f58
Frutos, Emilio
13a2cdf5-8c80-47a8-a224-a0ea04b8f9c4
Polcar, Tomas
c669b663-3ba9-4e7b-9f97-8ef5655ac6d2
Yavas, Hakan
18215fa7-989a-4abe-ba19-4a624fb9f272
Fraile, Alberto
a5360fc0-5002-4410-85fc-d0af55e36b8a
Huminiuc, Teodor
b743b7ba-7541-4f2e-b4be-ea25b088e4c6
Sen, Huseyin Sener
bb372413-c42d-4a9b-8337-bc27ee739f58
Frutos, Emilio
13a2cdf5-8c80-47a8-a224-a0ea04b8f9c4
Polcar, Tomas
c669b663-3ba9-4e7b-9f97-8ef5655ac6d2

Yavas, Hakan, Fraile, Alberto, Huminiuc, Teodor, Sen, Huseyin Sener, Frutos, Emilio and Polcar, Tomas (2019) Deformation-controlled design of metallic nanocomposites. ACS Applied Materials & Interfaces, 11 (49), 46296-46302. (doi:10.1021/acsami.9b12235).

Record type: Article

Abstract

Achieving the theoretical strength of a metallic alloy material is a demanding task that usually requires utilizing one or more of the well-established routes: (1) Decreasing the grain size to stop or slow down the dislocation mobility, (2) adding external barriers to dislocation pathways, (3) altering the crystal structure, or (4) combining two of the previous discrete strategies, that is, implementing crystal seeds into an amorphous matrix. Each of the outlined methods has clear limitations; hence, further improvements are required. We present a unique approach that envelops all the different strength-building strategies together with a new phenomenon–phase transition. We simulated the plastic deformation of a Zr–Nb nanolayered alloy using molecular dynamics and ab initio methods and observed the transition of Zr from hexagonal close-packed to face-centered cubic and then to body-centered cubic during compression. The alloy, which was prepared by magnetron sputtering, exhibited near-theoretical hardness (10.8 GPa) and the predicted transition of the Zr structure was confirmed. Therefore, we have identified a new route for improving the hardness of metallic alloys.

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Accepted/In Press date: 15 November 2019
e-pub ahead of print date: 15 November 2019
Published date: 11 December 2019
Keywords: nanolayered materials, metallic alloy, phase transition, interfaces, coating

Identifiers

Local EPrints ID: 437707
URI: http://eprints.soton.ac.uk/id/eprint/437707
ISSN: 1944-8244
PURE UUID: 7157101e-5d24-4799-8338-47bc2962c6ac
ORCID for Tomas Polcar: ORCID iD orcid.org/0000-0002-0863-6287

Catalogue record

Date deposited: 12 Feb 2020 17:32
Last modified: 19 Jul 2022 04:05

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Contributors

Author: Hakan Yavas
Author: Alberto Fraile
Author: Teodor Huminiuc
Author: Huseyin Sener Sen
Author: Emilio Frutos
Author: Tomas Polcar ORCID iD

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