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Morizou Eng Failure Analysis paper Corrosion fatigue of reinforcing tapes.pdf (1.54 MB)

Corrosion fatigue of phosphor bronze reinforcing tapes on underground power transmission cables - Failure analysis

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journal contribution
posted on 2019-02-01, 11:56 authored by M Foresta, S Gnanasambandam, D Weston, F Li, J Pan, M Le Blanc
This paper is an investigation on the failure mechanism involved in underground power transmission cables with their life limited by corrosion of phosphor bronze reinforcing tapes. In the present work, a detailed analysis of failed bronze tapes in an ammonium free environment has been undertaken and corrosion fatigue failure mechanism has been identified. A detailed examination of the tape samples is carried out using 2D and 3D optical microscopy and SEM. It follows a mechanical approach that confirms corrosion fatigue as the failure mechanism. SEM images reveal that the pits present on the surface could be the starting point for the crack that eventually leads to failure. Stress calculation shows that the tape could fail only if corrosion pits are present on the tape surface. Presence of corrosion pits, multi cracks and striations on the fractured surface demonstrates corrosion fatigue cracking as the failure mechanism across the tape samples.

Funding

This project is funded by Network Innovation Allowance (Project number NIA_NGET0103).

History

Citation

ENGINEERING FAILURE ANALYSIS, 2018, 91, pp. 507-515 (9)

Author affiliation

/Organisation/COLLEGE OF SCIENCE AND ENGINEERING/Department of Engineering

Version

  • AM (Accepted Manuscript)

Published in

ENGINEERING FAILURE ANALYSIS

Publisher

Elsevier for European Structural Integrity Society

issn

1350-6307

eissn

1873-1961

Acceptance date

2018-02-09

Copyright date

2018

Available date

2019-02-12

Publisher version

https://www.sciencedirect.com/science/article/pii/S1350630716308159

Notes

The file associated with this record is under embargo until 12 months after publication, in accordance with the publisher's self-archiving policy. The full text may be available through the publisher links provided above.

Language

en