SOLID PARTICLE EROSION PERFORMANCE OF MICRO ARC OXIDATION and ELECTRO SPARK DEPOSITION COATED Ti6Al4V SHEETS
Yıl 2022,
Cilt: 5 Sayı: 1, 28 - 32, 30.06.2022
Doğan Acar
Salim Levent Aktuğ
Kemal Korkmaz
Salih Durdu
Ömer Necati Cora
Öz
In this study, an aerospace-grade Ti6Al4V alloy was coated by micro-arc oxidation (MAO) and electro spark deposition (ESD) methods to investigate their effect on solid particle erosion performance. The surface morphology and mechanical properties of coatings were characterized with SEM and nanoindentation, respectively. Solid particle erosion performance of uncoated and coated Ti6Al4V alloy was investigated by using an in-house developed test system per ASTM G76-13 test standard. Effect of impact velocity (70 and 150 m/s) on erosive wear was examined using angular-shaped SiC erodent particles (348 μm in average diameter). The SEM analyses indicated the formation of cracks on coated surfaces after erosion tests. The MAO coatings’ surface was rough and porous due to plasma chemical reactions on micro discharge channels. The nature of ESD method resulted in deposits having rough surfaces owing to the rapid solidification of melted electrode and substrate materials under atmosphere conditions. Surface topography and crater depths were determined using a surface profilometer. Erosion rate was found to be increased with increasing impact velocity due to increased kinetic energy of erodent particles. Both MAO and ESD coated samples showed worse erosion performance compared to base material Ti6Al4V considering volumetric and gravimetric wear rates.
Kaynakça
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Yıl 2022,
Cilt: 5 Sayı: 1, 28 - 32, 30.06.2022
Doğan Acar
Salim Levent Aktuğ
Kemal Korkmaz
Salih Durdu
Ömer Necati Cora
Kaynakça
- [1] M. Parsi, K. Najmi, F. Najafifard, S. Hassani, B.S. McLaury, S.A. Shirazi, A comprehensive review of solid particle erosion modeling for oil and gas wells and pipelines applications, J. Nat. Gas Sci. Eng. 21 (2014) 850–873. https://doi.org/10.1016/j.jngse.2014.10.001.
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- [5] A.L. Yerokhin, X. Nie, A. Leyland, A. Matthews, S.J. Dowey, Plasma electrolysis for surface engineering, Surf. Coatings Technol. 122 (1999) 73–93. https://doi.org/https://doi.org/10.1016/S0257-8972(99)00441-7.
- [6] J. Zhou, S. Bahadur, Erosion-corrosion of Ti-6Al-4V in elevated temperature air environment, Wear. 186–187 (1995) 332–339. https://doi.org/10.1016/0043-1648(95)07161-X.
- [7] H. Proudhon, J. Savkova, S. Basseville, V. Guipont, M. Jeandin, G. Cailletaud, Experimental and numerical wear studies of porous Reactive Plasma Sprayed Ti–6Al–4V/TiN composite coating, Wear. 311 (2014) 159–166. https://doi.org/https://doi.org/10.1016/j.wear.2014.01.012.
- [8] N. Kumar, M. Shukla, Finite element analysis of multi-particle impact on erosion in abrasive water jet machining of titanium alloy, J. Comput. Appl. Math. 236 (2012) 4600–4610. https://doi.org/10.1016/j.cam.2012.04.022.
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- [18] S. Durdu, S.L. Aktuğ, K. Korkmaz, Characterization and mechanical properties of the duplex coatings produced on steel by electro-spark deposition and micro-arc oxidation, Surf. Coatings Technol. 236 (2013) 303–308. https://doi.org/https://doi.org/10.1016/j.surfcoat.2013.10.004.
- [19] Astm, ASTM G76-07, Standard Test Method for Conducting Erosion Tests by Solid Particle Impingement Using Gas Jets, West Conshohocken, PA, 2013. https://doi.org/10.1520/G0076-07.2.
- [20] A.W. Ruff, L.K. Ives, Measurement of solid particle velocity in erosive wear, Wear. 35 (1975) 195–199.
- [21] D. Acar, D. Meriç, H. Sofuoğlu, R. Gümrük, Ö.N. Cora, H. Gedikli, Helikopter Pali Aşinma Kalkaninda Meydana Gelen Kati Parçacik Erozyonunun İncelenmesi İçin Bir Test Düzeneği Tasarim Ve İmalati, in: VI. Ulus. Havacılık Ve Uzay Konf., Kocaeli, Türkiye, 2016: pp. 1–13.