Karakterisasi Sifat Termofisika Paduan Titanium Ti6Al4V

Gusti Umindya Nur Tajalla, Andi Idhil Ismail


Manufacturers are pushed to use superalloys such as titanium alloys in the aerospace part due to environmental and economic issues. The refractory properties of titanium alloys result in rapid and premature wear of the cutting tools, especially by thermal diffusion. Therefore, the purpose of this paper is to focus on understanding the characterization of TiAl6V4 in thermo-physic properties. X-ray diffraction (XRD), scanning electron microscope (SEM), electrical resistivity against temperature test, and differential scanning calorimetry (DSC) were conducted to analyze the relationship of phase transformation to thermal properties. Phase analysis showed that TiAl6V4 is composed of two-phase a and b creating a duplex microstructure in which the surface fraction contains about 92,5 % and 7,5 %, respectively. Electrical resistivity against temperature test demonstrated the phase transformation of a to b occurred at 1017°C. This study revealed that the phenomena of phase transformation affected the thermal properties, i.e., thermal capacity, thermal diffusivity, and coefficient of thermal expansion.


Characterization; Ti6Al4V; Microstructure; Thermo-Physic Properties

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N. KHANNA and K. S. SANGWAN, "Comparative machinability study on Ti54M titanium alloy in different heat treatment conditions," Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture, vol. 227, no. 1, pp. 96-101, 2012.

A. JAIN, N. KHANNA, and V. BAJPAI, "FE simulation of machining of Ti-54M titanium alloy for industry relevant outcomes," Measurement, vol. 129, pp. 268-276, 2018.

Y. D. SHANE Y. HONG, "Cooling approaches and cutting temperatures in cryogenic machining of Ti-6Al-4V," International Journal of Machine Tools & Manufacture, vol. 41, p. 21, 2001.

V. KRISHNARAJ, S. SAMSUDEENSADHAM, R. SINDHUMATHI, and P. KUPPAN, "A study on High Speed End Milling of Titanium Alloy," Procedia Engineering, vol. 97, pp. 251-257, 2014/01/01/ 2014.

M. ARMENDIA, A. GARAY, L. M. IRIARTE, and P. J. ARRAZOLA, "Comparison of the machinabilities of Ti6Al4V and TIMETAL® 54M using uncoated WC–Co tools," Journal of Materials Processing Technology, vol. 210, no. 2, pp. 197-203, 2010.

R. B. DA SILVA, Á. R. MACHADO, E. O. EZUGWU, J. BONNEY, and W. F. SALES, "Tool life and wear mechanisms in high speed machining of Ti–6Al–4V alloy with PCD tools under various coolant pressures," Journal of Materials Processing Technology, vol. 213, no. 8, pp. 1459-1464, 2013.

R. A. RAHMAN RASHID, S. PALANISAMY, S. SUN, and M. S. DARGUSCH, "Tool wear mechanisms involved in crater formation on uncoated carbide tool when machining Ti6Al4V alloy," The International Journal of Advanced Manufacturing Technology, vol. 83, no. 9-12, pp. 1457-1465, 2015.

M. LÖBEL, T. LINDNER, T. MEHNER, and T. LAMPKE, "Influence of Titanium on Microstructure, Phase Formation and Wear Behaviour of AlCoCrFeNiTix High-Entropy Alloy," Entropy, vol. 20, no. 7, p. 505, 2018.

B. K. JANG and Y. SAKKA, "Influence of microstructure on the thermophysical properties of sintered SiC ceramics," Journal of Alloys and Compounds, vol. 463, no. 1-2, pp. 493-497, 2008.

C.-W. KIM, J.-I. CHO, S.-W. CHOI, Y.-C. KIM, and C.-S. KANG, "The Effect of Alloying Elements on Thermal Conductivity and Casting Characteristic in High Pressure Die Casting of Aluminum Alloy," Cham, 2016, pp. 237-242: Springer International Publishing.

W. WIJAYANTI, "Identifikasi Efek Heating Rate terhadap Laju Kinetika Reaksi Pirolisis Kayu Mahoni dengan Thermal Analysis dan Termogravimetry," Rekayasa Mesin; Vol 10, No 1 (2019) DOI - 10.21776/ub.jrm.2019.010.01.9, 05/30/ 2019.

E. ROGOFF, M. ANTONY, and P. MARKLE, "Calculating Ti-6Al-4V β Transus Through a Chemistry-Based Equation Derived from Combined Element Binary Phase Diagrams," Journal of Materials Engineering and Performance, vol. 27, no. 10, pp. 5227-5235, 2018.

J. I. QAZI, J. RAHIM, F. H. FORES, O. N. SENKOV, and A. GENC, "Phase transformations in Ti-6Al-4V-xH alloys," Metallurgical and Materials Transactions A, vol. 32, no. 10, pp. 2453-2463, 2001.

J. W. ELMER, T. A. PALMER, and J. WONG, "In situobservations of phase transitions in Ti–6Al–4V alloy welds using spatially resolved x-ray diffraction," Journal of Applied Physics, vol. 93, no. 4, pp. 1941-1947, 2003.

M. BOIVINEAU et al., "Thermophysical Properties of Solid and Liquid Ti-6Al-4V (TA6V) Alloy," International Journal of Thermophysics, vol. 27, no. 2, pp. 507-529, 2006.

R. A. O. D. BASAK, D. WANG, "Measurement of Specific Heat Capacity and Electrical Resistivity of Industrial Alloys Using Pulse Heating Techniques," International Journal ofThermophysics, vol. 24, no. 6, 10 March 2003 2003.

X. CHUANGWEN, D. JIANMING, C. YUZHEN, L. HUAIYUAN, S. ZHICHENG, and X. JING, "The relationships between cutting parameters, tool wear, cutting force and vibration," Advances in Mechanical Engineering, vol. 10, no. 1, p. 168781401775043, 2018.

J. C. MINLI ZHENG, ZE LI, WEI ZHANG , PENGFEI LI, HAIHE XIE, "Experimental study on elements diffusion of carbide tool rake face in turning stainless steel," Journal of Advanced Mechanical Design, Systems, and Manufacturing, vol. 12, no. 4, 2018.

Y. S. KENNETH C. MILLS, ZUSHU LI and ROBERT F. BROOKS, "Equations for the Calculation of the Thermo-physical Properties of Stainless Steel", ISIJ International, vol. 44, no. 10, 2004.

A. SOMER et al., "Effects of thermal oxidation on the effective thermal diffusivity of titanium alloys," Journal of Physics D: Applied Physics, vol. 47, no. 38, p. 385306, 2014.

A. I. SALAZAR, "On thermal diffusivity," EUROPEAN JOURNAL OF PHYSICS, vol. 24, 2003.

R. H. BOGAARD, P. D. DESAI, H. H. LI, and C. Y. HO, "Thermophysical properties of stainless steels," Thermochimica Acta, vol. 218, pp. 373-393, 1993/05/03/ 1993.

P. N. QUESTED, R. F. BROOKS, L. CHAPMAN, R. MORRELL, Y. YOUSSEF, and K. C. MILLS, "Measurement and estimation of thermophysical properties of nickel based superalloys," Materials Science and Technology, vol. 25, no. 2, pp. 154-162, 2013.

J. W. ELMER, T. A. PALMER, S. S. BABU, and E. D. SPECHT, "In situ observations of lattice expansion and transformation rates of α and β phases in Ti–6Al–4V," Materials Science and Engineering: A, vol. 391, no. 1-2, pp. 104-113, 2005.

DOI: https://doi.org/10.21776/ub.jrm.2020.011.02.2


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