Effect on overall fatigue performance of varying thickness of an intermetallic sublayer within a soft multilayer coating
Effect on overall fatigue performance of varying thickness of an intermetallic sublayer within a soft multilayer coating
A series of 2IML multilayer coatings (composed of two hard intermetallic (IML) layers and two soft sublayers) with the different thickness of the first IML sublayer have been built to develop our mechanistic understanding of what controls its fatigue performance. Experimental investigations of these multilayer coatings reveal that decreasing the IML-Top layer's thickness provides improved fatigue resistance. This improvement could be linked to: (1) the increased difficulty of surface crack initiation due to the limitation of the strain ranges experienced at the top surface and (2) the shorter crack propagation period in a thinner IML-Top layer.
Bearings, Crack morphology, Electroplating, Fatigue, Multilayer coatings
Lu, Songsong
179a342f-28f8-4181-8767-f5be79806578
Cook, Richard
06f8322d-81be-4f82-9326-19e55541c78f
Reed, Philippa
8b79d87f-3288-4167-bcfc-c1de4b93ce17
Zhang, Yi
18b3a252-4a76-4cda-8404-4bb6e922468e
Lu, Songsong
179a342f-28f8-4181-8767-f5be79806578
Cook, Richard
06f8322d-81be-4f82-9326-19e55541c78f
Reed, Philippa
8b79d87f-3288-4167-bcfc-c1de4b93ce17
Zhang, Yi
18b3a252-4a76-4cda-8404-4bb6e922468e
Lu, Songsong, Cook, Richard, Reed, Philippa and Zhang, Yi
(2021)
Effect on overall fatigue performance of varying thickness of an intermetallic sublayer within a soft multilayer coating.
International Journal of Fatigue, 146, [106155].
(doi:10.1016/j.ijfatigue.2021.106155).
Abstract
A series of 2IML multilayer coatings (composed of two hard intermetallic (IML) layers and two soft sublayers) with the different thickness of the first IML sublayer have been built to develop our mechanistic understanding of what controls its fatigue performance. Experimental investigations of these multilayer coatings reveal that decreasing the IML-Top layer's thickness provides improved fatigue resistance. This improvement could be linked to: (1) the increased difficulty of surface crack initiation due to the limitation of the strain ranges experienced at the top surface and (2) the shorter crack propagation period in a thinner IML-Top layer.
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Accepted/In Press date: 12 January 2021
e-pub ahead of print date: 22 January 2021
Keywords:
Bearings, Crack morphology, Electroplating, Fatigue, Multilayer coatings
Identifiers
Local EPrints ID: 449975
URI: http://eprints.soton.ac.uk/id/eprint/449975
ISSN: 0142-1123
PURE UUID: a14c01f4-2f5d-4625-ab01-de8118ab4d92
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Date deposited: 01 Jul 2021 16:30
Last modified: 06 Jun 2024 01:47
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Author:
Songsong Lu
Author:
Yi Zhang
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