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Open AccessArticle

Repeated Laser Shock-Wave Adhesion Test for Metallic Coatings: Adhesion Durability and Its Mechanism Studied by Molecular Dynamics Simulation

Department of Precision Mechanics, Chuo University, 1-13-27 Kasuga, Bunkyo, Tokyo 112-8551, Japan
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Academic Editors: Antonio Ancona and Vasileios Koutsos
Coatings 2021, 11(3), 291; https://doi.org/10.3390/coatings11030291
Received: 11 January 2021 / Revised: 22 February 2021 / Accepted: 25 February 2021 / Published: 3 March 2021
(This article belongs to the Section Surface Characterization, Deposition and Modification)
We evaluated the adhesion of polycrystalline metallic coatings using the laser shock-wave adhesion test (LaSAT). This study used Cu plating on stainless steel as a coating model. The adhesion strength and toughness were successfully estimated using LaSAT and finite element method with cohesive zone model. Next, repeated LaSAT was conducted to apply cyclic loading to evaluate adhesion fatigue life, i.e., the number of loading cycles required for delamination. Furthermore, this study performed molecular dynamics (MD) simulations to elucidate the adhesion mechanism for the Cu/Fe interface. To verify our model, the interfacial fracture toughness was computed using the MD simulation and compared with the results of LaSAT. Next, cyclic loading was applied to the MD model to investigate crack initiation around the interface. We found that dislocations are generated from the internal grain and are accumulated at grain boundaries. This accumulation results in fatigue crack initiation due to stress concentration. View Full-Text
Keywords: laser shockwave; metallic coating; adhesion; molecular dynamics simulation laser shockwave; metallic coating; adhesion; molecular dynamics simulation
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MDPI and ACS Style

Kanamori, K.; Toriumi, S.; Kimoto, Y.; Yonezu, A. Repeated Laser Shock-Wave Adhesion Test for Metallic Coatings: Adhesion Durability and Its Mechanism Studied by Molecular Dynamics Simulation. Coatings 2021, 11, 291. https://doi.org/10.3390/coatings11030291

AMA Style

Kanamori K, Toriumi S, Kimoto Y, Yonezu A. Repeated Laser Shock-Wave Adhesion Test for Metallic Coatings: Adhesion Durability and Its Mechanism Studied by Molecular Dynamics Simulation. Coatings. 2021; 11(3):291. https://doi.org/10.3390/coatings11030291

Chicago/Turabian Style

Kanamori, Kohei; Toriumi, Shuto; Kimoto, Yoshikatsu; Yonezu, Akio. 2021. "Repeated Laser Shock-Wave Adhesion Test for Metallic Coatings: Adhesion Durability and Its Mechanism Studied by Molecular Dynamics Simulation" Coatings 11, no. 3: 291. https://doi.org/10.3390/coatings11030291

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