DETERMINATION OF THERMAL STRESS AND ELONGATION ON DIFFERENT CERAMIC COATED Ti-6Al-4V ALLOY AT ELEVATED TEMPERATURES BY FINITE ELEMENT METHOD

Authors : Berkay ERGENE, Çağın BOLAT

Pages : 2013-2026

View : 54 | Download : 5

Publication Date : 2021-10-05

Article Type : Research Paper

Abstract :Recently, coating applications of hard engineering ceramics on metallic alloys have become notably widespread in order to expand the service life of the critical design components working in though conditions like corrosive/oxidative or erosive/abrasive media. Even though scientific efforts on coating processes and their effects on wear and corrosion performance have been studied for years, there is a lack of investigation about mechanical properties, especially thermo-mechanical features of hard ceramic coated metals. In this paper, on the purpose of determination of the thermal stress distribution, effects of coating materials insert ignore into journalissuearticles values(Al2O3, AlN and TiB2); and coating thickness insert ignore into journalissuearticles values(400 µm, 600 µm, and 800 µm); on Von-Mises stress, shear stress and resultant displacement for single and full surface coating models designed on Ti-6Al-4V base material are investigated at 373 K, 573 K and 873 K. The results show that modulus of elasticity and thermal expansion coefficient of coating ceramic materials and base metallic material affect the elongation and stress values observed on designed models significantly. Besides, coating thickness and ambient temperature are also effective on thermal properties. Lastly, it can be pointed out that resultant displacement values on a single-surface coating model are higher than full surface coating model. However, Von-Mises and shear stress values calculated with finite element analysis on single surface coating model is lower than the values read for full-surface coating model.
Keywords : Finite element analysis, Ti 6Al 4V, thermal stress, thermal expansion, ceramic coating

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