Abstract
In order to improve the resistance of materials to surface damage by mechanical and environmental action, considerable research has been conducted to increase the hardness of the surface of mechanical parts. This is achieved, for example, by anodisation of aluminium alloys. The objective of designing films possessing optimum mechanical properties cannot avoid the determination of their hardness as precisely as possible. Unfortunately, direct measurement of film hardness by conventional micro-hardness testing is not possible for a large range of indentation loads because the substrate also participates in the plastic deformation occurring during the indentation process. It is often assumed that this phenomenon, which involves the two materials, begins to be noticeable for loads such that the depth of the indent exceeds one tenth of the film thickness. In this situation, the hardness number is thus the result of the combined substrate and film contributions. In order to determine the true hardness of the film, it is necessary to separate these contributions. Numerous mathematical models were proposed for that purpose on the basis of different assumptions. The objective of the present work is to study hardness response of oxide film developed by sulphuric anodisation on annealing aluminium alloys substrates (2017A) over a range of applied loads. The hardness values were determined experimentally using conventional Vickers microhardness measurements. The results were analysed using the work-of-indentation model for the hardness of coated systems. Both experimental measurements and modelling work in this area will be aimed at obtaining the estimates mechanical properties of oxide layer.
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References
Hwang SK, Jeong SH, Hwang HY, Lee OJ, Lee KH (2002) Fabrication of highly ordered pore array in anodic aluminum oxide. Korean J. Chem. Eng. 19/3: 467.
Doener MF, Nix WD (1986) A method for interpreting data from depth-sensing indentation instruments. J. Mater. Res. 1: 601.
Oliver WC, Pharr GM (1992) An improved technique for determining hardness and elastic modulus using load and displacement sensing indentation experiments. J. Mater. Res. 7: 1564.
Zeng K, Chiu CH (2001) An analysis of load—penetration curves from instrumented indentation. Acta Mater. 49: 141.
Musil J, Kunc F, Zeman H, polakova H (2002) Relationships between hardness Young's modulus and elastic recovery in hard nanocomposite coatings. Surf. Coat Technol. 154: 304.
Wen SP, Zong RL, Zeng F, Gao Y, Pan F (2007) Evaluating modulus and hardness enhancement in evaporated Cu/W multilayers. Acta Mater. 55: 345.
Lesage J, Pertuz A, Puchi Carbrera ES, Chicot D (2006) A model to determine the surface hardness of thin films from standard micro-indentation tests. Thin Solid Films 497: 232.
Chicot D, Bénarioua Y, Lesage J (2000) Hardness measurements of Ti and TiC multilayers: a model. Thin Solid Films 359: 228.
Korsunsky AM, McGurk MR, Bull SJ, Page TF (1998) On the hardness of coated systems. Surf. Coat. Technol. 99: 171.
Tuck JR, Korsunsky AM, Davidson RI, Bull SJ, Elliott DM (2000) Modelling of the hardness of electroplated nickel coating on copper substrates. Surf. Coat. Technol. 127: 1.
Ichimura H, Rodriguez FM, Rodrigo A (2000) The composite and film hardness of TiN coatings prepared by cathodic arc evaporation. Surf. Coat. Technol. 127: 138.
Jönsson B, Hogmark S (1984) Hardness measurements of thin films. Thin Solid Films 114: 257.
Chicot D, Bemporad E, Galtieri G, Roudet F, Alvisi M, Lesage J (2008) Analysis of data from various indentation techniques for thin films intrinsic hardness modelling. Thin Solid Films 516: 1964–1971.
Fratila-Apachitei LE, Terryn H, Skeldon P, Thompson GE, Duszczyk J, Katgerman L (2004) Influence of substrate microstructure on the growth of anodic oxide layers. Electrochim. Acta 49: 1127.
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Fares, C., Boukharouba, T., Belouchrani, M.E.A., Britah, A., Abdelaziz, M.N. (2009). Determination of the Hardness of the Oxide Layers of 2017A Alloys. In: Boukharouba, T., Elboujdaini, M., Pluvinage, G. (eds) Damage and Fracture Mechanics. Springer, Dordrecht. https://doi.org/10.1007/978-90-481-2669-9_1
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DOI: https://doi.org/10.1007/978-90-481-2669-9_1
Publisher Name: Springer, Dordrecht
Print ISBN: 978-90-481-2668-2
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