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Investigating the fatigue performance of soft multilayer coatings with varying locations of an intermetallic interlayer

Investigating the fatigue performance of soft multilayer coatings with varying locations of an intermetallic interlayer
Investigating the fatigue performance of soft multilayer coatings with varying locations of an intermetallic interlayer

A multilayer coating system containing two hard intermetallic layers (IMLs) within a soft metallic system provides improved fatigue performance. To further optimise this system, various coatings with different locations of the intermediate intermetallic (IML-Top) interlayer were manufactured and experimentally investigated. Their characteristics were assessed and fatigue performances were compared, revealing the improvement of fatigue resistance by locating the IML-Top layer close to the top overlay coating surface. The mechanisms, based on post-test observations of crack morphology, are identified as (1) improved retardation of crack initiation and (2) improved crack growth resistance provided by the shielding effect of the IML-Top layer.

Coatings, Crack morphology, Electroplating, Fatigue, Multilayer
0142-1123
Lu, Songsong
179a342f-28f8-4181-8767-f5be79806578
Cook, Richard
06f8322d-81be-4f82-9326-19e55541c78f
Reed, Philippa
8b79d87f-3288-4167-bcfc-c1de4b93ce17
Yi, Jiasheng
cc5a38c9-0152-47a7-8fe1-1841c743cb7c
Lu, Songsong
179a342f-28f8-4181-8767-f5be79806578
Cook, Richard
06f8322d-81be-4f82-9326-19e55541c78f
Reed, Philippa
8b79d87f-3288-4167-bcfc-c1de4b93ce17
Yi, Jiasheng
cc5a38c9-0152-47a7-8fe1-1841c743cb7c

Lu, Songsong, Cook, Richard, Reed, Philippa and Yi, Jiasheng (2020) Investigating the fatigue performance of soft multilayer coatings with varying locations of an intermetallic interlayer. International Journal of Fatigue, 145, [106130]. (doi:10.1016/j.ijfatigue.2020.106130).

Record type: Article

Abstract

A multilayer coating system containing two hard intermetallic layers (IMLs) within a soft metallic system provides improved fatigue performance. To further optimise this system, various coatings with different locations of the intermediate intermetallic (IML-Top) interlayer were manufactured and experimentally investigated. Their characteristics were assessed and fatigue performances were compared, revealing the improvement of fatigue resistance by locating the IML-Top layer close to the top overlay coating surface. The mechanisms, based on post-test observations of crack morphology, are identified as (1) improved retardation of crack initiation and (2) improved crack growth resistance provided by the shielding effect of the IML-Top layer.

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Accepted/In Press date: 24 December 2020
e-pub ahead of print date: 30 December 2020
Keywords: Coatings, Crack morphology, Electroplating, Fatigue, Multilayer

Identifiers

Local EPrints ID: 449974
URI: http://eprints.soton.ac.uk/id/eprint/449974
ISSN: 0142-1123
PURE UUID: 678738b6-29d5-4820-9419-7200ffa58729
ORCID for Philippa Reed: ORCID iD orcid.org/0000-0002-2258-0347

Catalogue record

Date deposited: 01 Jul 2021 16:30
Last modified: 13 Jul 2021 01:35

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Contributors

Author: Songsong Lu
Author: Richard Cook
Author: Philippa Reed ORCID iD
Author: Jiasheng Yi

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