Measurement of the interfacial shear strength of a PEO coated aluminium alloy

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

  • External authors:
  • D. T. Asquith
  • Y. H. Tai
  • C. X. Wong
  • J. R. Yates

Abstract

Interest in oxide ceramic coated metals, in particular aluminium alloys has increased in recent years. Treatment processes such as plasma electrolytic oxidation (PEO) are more frequently being exploited commercially to provide hard wearing chemical and thermal barriers. This has led to an interest in the failure of such coated systems and the development of duplex systems, those using mechanical pre-stressing, for increased fatigue life. Failure mechanisms in these systems are often assumed without testing thus limiting our ability to optimise. The influence of interfacial shear strength is crucial to the understanding of the failure mechanism in both simple treatments and duplex systems. This paper demonstrates a method for evaluating the interfacial shear strength in PEO coated 2024 as part of a simple tensile test. Direct optical methods have been used to measure surface strains at macro and micro scales and the shear lag method applied to infer the interfacial bond strength. The influence of coating on the general stress-strain behaviour is examined and the interfacial shear strength evaluated.

Bibliographical metadata

Original languageEnglish
Title of host publication17th European Conference on Fracture 2008
Subtitle of host publicationMultilevel Approach to Fracture of Materials, Components and Structures
Pages2105-2111
Number of pages7
Volume3
Publication statusPublished - 1 Dec 2008
Event17th European Conference on Fracture 2008: Multilevel Approach to Fracture of Materials, Components and Structures, ECF17 - Brno, Czech Republic
Event duration: 2 Sep 20085 Sep 2008

Conference

Conference17th European Conference on Fracture 2008: Multilevel Approach to Fracture of Materials, Components and Structures, ECF17
CountryCzech Republic
CityBrno
Period2/09/085/09/08