Effect of electropulsing on the fatigue resistance of aluminium alloy 2014-T6

Babutskyi, A, Mohin, M ORCID: https://orcid.org/0000-0003-2240-464X, Chrysanthou, A, Xu, Y and Lewis, A (2020) Effect of electropulsing on the fatigue resistance of aluminium alloy 2014-T6. Materials Science and Engineering: A, 772. p. 138679. ISSN 0921-5093

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Abstract

The effects of electropulsing on the fatigue resistance of aluminium alloy 2014-T6 were studied in relation to electric current amplitude, pulse duration, and number of repetitions. Utilising the Taguchi method, the present study identified the current amplitude and the duration of the electropulsing as the two critical treatment parameters for improved fatigue resistance. A 97% fatigue life improvement was achieved under the electropulsing conditions that were applied. An increase in microhardness and a decrease in electrical conductivity due to electropulsing were correlated with enhanced fatigue resistance in the alloy. Mechanisms related to the effects of the electropulsing treatment were elucidated based on observations from scanning electron microscopy (SEM) and transmission electron microscopy (TEM) as well as numerical simulation results. The mechanisms identified by observation included dislocation movement and the secondary precipitation of GP-zones. Further explication of these mechanisms was provided by the application of a “magnetic field’’ model.

Item Type:	Article
Peer-reviewed:	Yes
Date Deposited:	25 Nov 2019 12:53
Publisher:	Elsevier BV
Additional Information:	This is an Author Accepted Manuscript of a paper accepted for publication in Materials Science and Engineering: A published by and copyright Elsevier.
Divisions:	Faculties > Science and Engineering
Subject terms:	electropulsing, aluminium alloy, fatigue, dislocations, precipitation hardening, fracture, Materials, 0912 Materials Engineering, 0913 Mechanical Engineering
Report number:	138679
URI:	https://e-space.mmu.ac.uk/id/eprint/624410
DOI:	https://doi.org/10.1016/j.msea.2019.138679
ISSN	0921-5093

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