Determination of residual stresses in coated metallic substrates

Bouchet, J.; Roche, A.; Jacquelin, Éric

doi:10.1163/156856101750196775

Cited by 24 publications

(29 citation statements)

References 11 publications

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“…In recent works we have reported that the consideration of the mechanical interphase properties is of prime importance to understand the mechanical behavior of bonded structures [32,33]. To point out the role of the interphase formation on the fracture toughness we used the model developed in order to calculate both residual stresses and the critical strain energy release rate.…”

Section: Resultsmentioning

confidence: 99%

“…A profile of residual stresses within the tri-layer system (bulk coating=interphase=substrate) was also reported [32]. During the curing cycle each material forming the tri-layer system is subject to strains, which can be either of chemical and=or thermal origin.…”

Section: Residual Stress Calculationmentioning

confidence: 97%

“…As the interphase formation results from both dissolution and diffusion phenomena, we were able to control the interphase formation within coated systems by controlling the liquid-solid contact time and then to make tri-or bi-layered systems. So, we determined the critical strain energy release rate, G c , using a model recently developed, based on a three-point flexure test [32][33][34]. The particularity of this model is to take into account both the mechanical properties such as the Young's modulus gradient and also residual stress profile within a bi-or trilayered system.…”

Section: Overview Of the Present Workmentioning

confidence: 99%

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The Role of the Residual Stresses of the Epoxy-Aluminum Interphase on the Interfacial Fracture Toughness

Roche

Aufray

Bouchet

2006

The Journal of Adhesion

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When an epoxy-diamine system (DGEBA-IPDA) is applied onto aluminum alloy (5754) and cured, an interphase having chemical, physical, and mechanical properties quite different from those of the bulk polymer is created between the substrate and the part of the polymer having bulk properties. To get a better understanding of the role of the interphase on the interfacial fracture toughness either a tri-layer (bulk coating=interphase=substrate) or a bi-layer model (bulk coating=substrate) were used for quantitative determination of the critical strain energy release rate (noted G c ). Indeed, as the interphase formation results from both dissolution and diffusion phenomena, we were able to control the interphase formation within coated systems by controlling the liquid-solid contact time and then to make tri-or bi-layered systems. The particularity of models used is to consider residual stress profiles developed within the entire system leading to an intrinsic parameter representing the work of adhesion between the polymer and the metallic substrate. The aim of this publication is to clearly establish the role of the interphase mechanical properties, such as Young's modulus and residual stress on the interfacial fracture toughness. Results are presented and discussed for three different aluminum surface treatments (chemical etching, degreasing and anodizing).

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Section: Resultsmentioning

confidence: 99%

Section: Residual Stress Calculationmentioning

confidence: 97%

Section: Overview Of the Present Workmentioning

confidence: 99%

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The Role of the Residual Stresses of the Epoxy-Aluminum Interphase on the Interfacial Fracture Toughness

Roche

Aufray

Bouchet

2006

The Journal of Adhesion

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“…These crystals induce changes of mechanical properties (effective Young's modulus, residual stresses, practical adhesion, durability [15][16][17][18][19][20][21][22][23] . .…”

Section: Introductionmentioning

confidence: 99%

Is gold always chemically passive?

Aufray

Roche

2008

Applied Surface Science

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OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible. AbstractWhen epoxy-amine liquid mixtures are applied onto metallic substrates (such as Al, Ti, Sn, Zn, Fe, Cr, Cu, Ag, Ni, and Au), concomitant amine chemisorption and metallic surface dissolution occur, leading to organo-metallic complex formation. The interphase formation was studied, using two different amines as hardener (IsoPhoroneDiAmine and DiEthyleneTriAmine). If the complex concentration within the liquid amine or epoxyamine prepolymer was higher than its solubility limit, the complexes will crystallize. Sharp needle-like crystals were only observed with metal-IPDA organo-metallic complexes. A lot of metals are widely used as reactive substrates with gold as a reference, which is considered chemically inert. It is misleading, since it will be shown in this article that gold reacts with amine, just as the other metals.

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“…6 Guo et al showed that uniform tensile residual stresses reduce central deflection in the blister test under small loads when bending is dominant. 7 Bouchet et al 8 and Guo et al 4 considered the effect of residual stresses on the strain energy release rate measured with a double cantilever adhesion test. Daghyani et al studied the effect of thermal residual stress on the local crack-tip stress field and the path of crack propagation.…”

Section: Introductionmentioning

confidence: 99%

Effects of tensile and compressive in-plane stress fields on adhesion in laser induced delamination experiments

Федоров

Vellinga

Hosson

2008

Journal of Applied Physics

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Effects of tensile and compressive in-plane stress fields on adhesion in laser induced delamination experiments Fedorov, A.; Vellinga, W. P.; de Hosson, J. Th. M. Take-down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.Downloaded from the University of Groningen/UMCG research database (Pure): http://www.rug.nl/research/portal. For technical reasons the number of authors shown on this cover page is limited to 10 maximum. In this work, the adhesion of a polymer coating on steel substrate subjected to uniaxial tensile plastic deformations was studied with the laser induced delamination technique. A decrease in the practical work of adhesion has been measured as the deformation of the substrate progressed. Moreover, it was observed that the deformation of the metal substrate introduced in-plane stresses in the polymer coating. Delamination was studied under compressive or tensile in-plane stresses. The model presented enabled to derive from the experimental data not only the practical work of adhesion but also the magnitude and the character ͑tensile or compressive͒ of the in-plane stress. The strain fields of the metal substrate during plastic deformation and after the elastic relaxation were monitored with a digital image correlation analysis system. The measured strain fields were confronted to the in-plane stresses obtained from the delamination experiments.

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Determination of residual stresses in coated metallic substrates

Cited by 24 publications

References 11 publications

The Role of the Residual Stresses of the Epoxy-Aluminum Interphase on the Interfacial Fracture Toughness

The Role of the Residual Stresses of the Epoxy-Aluminum Interphase on the Interfacial Fracture Toughness

Is gold always chemically passive?

Effects of tensile and compressive in-plane stress fields on adhesion in laser induced delamination experiments

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