Effect of Surface Treatment and Heat Treatment on the Microstructure and Mechanical Properties of Ti6Al4V Alloy Manufactured by Selective Laser Melting
محورهای موضوعی : Journal of Environmental Friendly Materials
Q Salim Shaher
1
(
Department of Materials Engineering, South Tehran Branch, Islamic Azad University, Tehran, Iran
)
M Razazi Boroujeni
2
(
Department of Materials Engineering, Lenjan Branch, Islamic Azad University, Isfahan, Iran
)
S Nosohiyan
3
(
Faculty of Skills and Entrepreneurship, Isfahan Branch, Islamic Azad University, Isfahan, Iran
)
کلید واژه:
چکیده مقاله :
One of the most attractive and widely used alloys in the industry and field of implants is titanium and titanium alloys, including Ti6Al4V. The outstanding properties and application of this with the attractive capabilities of additive manufacturing technology have increased the inclination towards additive manufacturing of titanium parts. In this research, the effect of surface treatment and heat treatment on the microstructure and mechanical properties of Ti6Al4V alloy manufactured by selective laser melting was investigated. For this purpose, Ti6Al4V alloy produced by selective laser melting was subjected to annealing heat treatment at 1050 degrees Celsius and surface treatment of surface ultrasonic mechanical stimulation. Then, the microstructure and phases of Ti6Al4V alloy, which included α and β phases, were investigated with optical microscopy and X-ray diffraction analysis. The mechanical properties of the samples were also checked by Vickers hardness, tensile and uniaxial compression tests. The results showed that annealing heat treatment and then aging decreases the strength properties but increases the flexibility and toughness. By performing surface treatment, the hardness of Ti6Al4V alloy increases. In general, it can be said that the desired properties of this alloy, produced by selective laser melting, can be obtained by performing suitable surface and thermal treatments.
[1] Yan X, Yin S, Chen C, Jenkins R, Lupoi R, Bolot R, Ma W, Kuang M, Liao H, Lu J, Liu M. Fatigue strength improvement of selective laser melted Ti6Al4V using ultrasonic surface mechanical attrition. Materials Research Letters. 2019 Aug;7(8):327-333.
[2] Navarro Pintado C, Vázquez Valeo J, Domínguez Abascal J, Periñán A, García Herrera M, Lasagni FA, Bernarding S, Slawik S, Mücklich F, Boby F, Hackel L. Effect of surface treatment on the fatigue strength of additive manufactured Ti6Al4V alloy. Frattura ed IntegritaStrutturale. 2020 July;14(53).
[3] Zhang M, Yang Y, Wang D, Xiao Z, Song C, Weng C. Effect of heat treatment on the microstructure and mechanical properties of Ti6Al4V gradient structures manufactured by selective laser melting. Materials Science and Engineering A. 2018 Oct;736:288-297.
[4] Liu J, Liu J, Li Y, Zhang R, Zeng Z, Zhu Y, Zhang K, Huang A. Effects of post heat treatments on microstructures and mechanical properties of selective laser melted Ti6AL4V alloy. Metals. 2021 Oct;11(10):1593.
[5] Rafi HK, Karthik NV, Gong H, Starr TL, Stucker BE. Microstructures and mechanical properties of Ti6Al4V parts fabricated by selective laser melting and electron beam melting. Journal of materials engineering and performance. 2013 Dec;22:3872-3883.
[6] Donachie MJ. Titanium: a Technical Guide. ASM International, 2000.
[7] Al-Bermani SS, Blackmore ML, Zhang W, Todd I. The origin of microstructural diversity, texture, and mechanical properties in electron beam melted Ti-6Al-4V. Metallurgical and materials transactions A. 2010 Dec;41:3422-3434.
[8] Pushilina N, Panin A, Syrtanov M, Kashkarov E, Kudiiarov V, Perevalova O, Laptev R, Lider A, Koptyug A. Hydrogen-induced phase transformation and microstructure evolution for Ti-6Al-4V parts produced by electron beam melting. Metals. 2018 Apr;8(5):301.
[9] de Formanoir C, Michotte S, Rigo O, Germain L, Godet S. Electron beam melted Ti–6Al–4V: Microstructure, texture and mechanical behavior of the as-built and heat-treated material. Materials Science and Engineering A. 2016 Jan;652:105-119. https://doi.org/10.1016/j.msea.2015.11.052
[10] Facchini L, Magalini E, Robotti P, Molinari A. Microstructure and mechanical properties of Ti‐6Al‐4V produced by electron beam melting of pre-alloyed powders. Rapid Prototyping Journal. 2009 May;15(3):171-178.
[11] Koike M, Martinez K, Guo L, Chahine G, Kovacevic R, Okabe T. Evaluation of titanium alloy fabricated using electron beam melting system for dental applications. Journal of Materials Processing Technology. 2011 Aug;211(8):1400-1408. https://doi.org/10.1016/j.jmatprotec.2011.03.013
