Fatigue performance of DIARC® plasma coated bonded metal specimens

Jarkko Aakkula; Jarno Jokinen; Olli Saarela

doi:10.1016/j.ijadhadh.2017.09.009

Fatigue performance of DIARC^® plasma coated bonded metal specimens

Jarkko Aakkula^*, Jarno Jokinen, Olli Saarela

^*Corresponding author for this work

Department of Mechanical Engineering

Tampere University of Technology

Research output: Contribution to journal › Article › Scientific › peer-review

1 Citation (Scopus)

Abstract

The fatigue performance of DIARC^® vacuum plasma surface treatment for titanium, stainless-steel and aluminium structural bonding was tested with double lap shear test specimens. In the metal surface treatment, a nanoscale DIARC Bindo coating is deposited on the substrates in a vacuum chamber. The DIARC-treated surface is ready for bonding and does not require any additional treatments, chemicals or primers containing hazardous CrVI chromium. Finite element method was used in analysing the test specimens. The tests were performed at room temperature dry and at room temperature after hot and wet exposure. The specimens were cycled with constant amplitude loading until failure or until 10 million cycles. The fatigue performance of the DIARC coating was found acceptable. There were no interfacial failures between the DIARC coating and metal or between the DIARC coating and adhesive. The residual strengths of all specimens after 10 million cycles were comparable to the static strength.

Original language	English
Pages (from-to)	83-94
Number of pages	12
Journal	International Journal of Adhesion and Adhesives
Volume	79
DOIs	https://doi.org/10.1016/j.ijadhadh.2017.09.009
Publication status	Published - 1 Dec 2017
MoE publication type	A1 Journal article-refereed

Keywords

DIARC plasma coating
Fatigue testing
Surface preparation for metal bonding

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10.1016/j.ijadhadh.2017.09.009

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abstract = "The fatigue performance of DIARC{\textregistered} vacuum plasma surface treatment for titanium, stainless-steel and aluminium structural bonding was tested with double lap shear test specimens. In the metal surface treatment, a nanoscale DIARC Bindo coating is deposited on the substrates in a vacuum chamber. The DIARC-treated surface is ready for bonding and does not require any additional treatments, chemicals or primers containing hazardous CrVI chromium. Finite element method was used in analysing the test specimens. The tests were performed at room temperature dry and at room temperature after hot and wet exposure. The specimens were cycled with constant amplitude loading until failure or until 10 million cycles. The fatigue performance of the DIARC coating was found acceptable. There were no interfacial failures between the DIARC coating and metal or between the DIARC coating and adhesive. The residual strengths of all specimens after 10 million cycles were comparable to the static strength.",

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AB - The fatigue performance of DIARC® vacuum plasma surface treatment for titanium, stainless-steel and aluminium structural bonding was tested with double lap shear test specimens. In the metal surface treatment, a nanoscale DIARC Bindo coating is deposited on the substrates in a vacuum chamber. The DIARC-treated surface is ready for bonding and does not require any additional treatments, chemicals or primers containing hazardous CrVI chromium. Finite element method was used in analysing the test specimens. The tests were performed at room temperature dry and at room temperature after hot and wet exposure. The specimens were cycled with constant amplitude loading until failure or until 10 million cycles. The fatigue performance of the DIARC coating was found acceptable. There were no interfacial failures between the DIARC coating and metal or between the DIARC coating and adhesive. The residual strengths of all specimens after 10 million cycles were comparable to the static strength.

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