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Control of fatigue failure mechanisms in multilayer coatings by varying the architectural parameters of an intermetallic interlayer
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  • Songsong Lu,
  • Richard Cook,
  • Yi Zhang,
  • Philippa Reed
Songsong Lu
University of Southampton Faculty of Physical Sciences and Engineering
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Richard Cook
University of Southampton Faculty of Physical Sciences and Engineering
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Yi Zhang
Daido Metal Co Ltd European Technical Centre (UK) Winterhay Lane Ilminister TA19 9PH UK
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Philippa Reed
University of Southampton Faculty of Physical Sciences and Engineering
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Abstract

A multilayer overlay coating system containing an intermediate intermetallic layer (designated 2IML) is an architecture expected to show good fatigue resistance. Experimental characterisation and modelling simulations were carried out to classify the different crack initiation mechanisms occurring during fatigue of this coating system and to reveal how changes in the layer architecture lead to fatigue improvement. Fatigue improvement is achieved by decreasing the IML-Top layer thickness due to the increased surface crack initiation resistance. However subsurface initiation mechanisms inhibit the improvement (dominated by surface initiation mechanism) achieved by locating the IML-Top layer closer to the top surface.

Peer review status:Published

07 Dec 2021Submitted to Fatigue & Fracture of Engineering Materials & Structures
11 Dec 2021Submission Checks Completed
11 Dec 2021Assigned to Editor
12 Dec 2021Reviewer(s) Assigned
15 Dec 2021Review(s) Completed, Editorial Evaluation Pending
21 Dec 2021Editorial Decision: Revise Major
28 Dec 20211st Revision Received
28 Dec 2021Submission Checks Completed
28 Dec 2021Assigned to Editor
28 Dec 2021Reviewer(s) Assigned
28 Dec 2021Review(s) Completed, Editorial Evaluation Pending
30 Dec 2021Editorial Decision: Accept
12 Jan 2022Published in Fatigue & Fracture of Engineering Materials & Structures. 10.1111/ffe.13649