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Optimization of Mechanical Properties and Corrosion Resistance of β-Ti-18Mo-7Cr Alloy through Heat Treatment for Orthopedic Implant Applications

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Abstract:

β Ti-18Mo-xCr alloy has been widely used as an orthopedic implant material because this alloy has the advantage of high strength a lower modulus of elasticity than commercial alloys Ti-6Al-4V, good corrosion resistance. and formability. This research aims to find alloys with high corrosion resistance and low modulus of elasticity and identify the presence of phase β after heat treatment. Ti-18Mo-7Cr is obtained from the melting process using an arc melting furnace followed by heat treatment (solution and aging treatment). To determine the modulus of elasticity using a sonelastic tool and hardness test using Microhardness Vickers. The EIS method was used to determine the corrosion resistance using a 0.9% NaCl solution as a simulated body fluid. The modulus of elasticity owned by the solution treatment alloy tends to be lower than that of the aging alloy. The lowest elastic modulus value and the highest hardness value are found in the Ti-18Mo-7Cr ST850 alloy, which is 91 GPa and 471.42 HV. For corrosion resistance, the aging treatment alloy shows a lower corrosion rate than the solution treatment alloy and is much lower than that of the Ti-6Al-4V alloy. On the other hand, the solution treatment can stabilize the β phase and reduce the corrosion rate due to heating below transus temperature, but aging with a longer holding time can also reduce corrosion resistance more than the corrosion resistance of the solution treatment. The alloy Ti-18Mo-7Cr AT500 has the lowest corrosion rate among the samples in this study, which is 0,0004225 mmpy.

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Journal of Biomimetics, Biomaterials and Biomedical Engineering Vol. 72 View Preview

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Periodical:

Journal of Biomimetics, Biomaterials and Biomedical Engineering (Volume 72)

Pages:

77-83

DOI:

https://doi.org/10.4028/p-2XmdDv

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Online since:

May 2026

Authors:

Rosita Utari*, Bunga Rani Elvira, Adi Noer Syahid, Alfirano Alfirano, Galih Senopati, Uceu Suhuddin

Keywords:

Aging Treatment (AT), Corrosion Resistance, Elastic Modulus, Solution Treatment (ST), β-Titanium

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© 2026 Trans Tech Publications Ltd. All Rights Reserved

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