The effect of size on the plastic deformation of annealed cast aluminium microwires
Verheyden, S.; Da Veiga, L. Pires; Deillon, L.; Mortensen, A.
2019

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Abstract

Monocrystalline, cast aluminium microwires of diameter (D) below 25 mu m free of micromilling artefacts are annealed under protective atmosphere. Annealing increases the flow stress of all tested microwires, by an amount that is found, in a Haasen plot of measured activation area values, to be an athermal contribution to the flow stress that is attributed to surface oxide layer thickening. Microwires oriented for single slip with D similar to 14 mu m behave as do as-cast microwires with D similar to 7 mu m, showing a transition to higher and more stochastic flow stress values; this effect is attributed to a greater scarcity of dislocation sources after annealing. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd.

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Title The effect of size on the plastic deformation of annealed cast aluminium microwires
Author(s) Verheyden, S. ; Da Veiga, L. Pires ; Deillon, L. ; Mortensen, A.
Published in Scripta Materialia
Volume 161
Pages 58-61
Date 2019-03-01
ISSN 1359-6462
Keywords
Note This is an open access article under the terms of the Creative Commons Attribution License
DOI https://doi.org/10.1016/j.scriptamat.2018.10.009
Other identifier(s) View record in Web of Science
Laboratories LMM
Record Appears in Scientific production and competences > STI - School of Engineering > IMX - Institute of Materials > LMM - Mechanical Metallurgy Laboratory
Peer-reviewed publications
Work produced at EPFL
Journal Articles
Published
Record creation date 2019-01-23

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