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Factors Influencing the Corrosion Behavior of Direct Metal Laser Sintered Ti-6Al-4V for Biomedical Applications

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Abstract

In this study, the effects of microstructure, surface roughness, and surface porosity on the corrosion behavior of direct metal laser sintered (DMLS) Ti-6Al-4V were experimentally investigated. The electrochemical measurements were conducted using a three-electrode setup setting, with the specimens in Ringer’s solution at 37 °C. The acicular microstructure in the DMLS Ti-6Al-4V samples resulted in greater corrosion resistance than that of the Grade 5 alloy with an equiaxed microstructure. Electrochemical study results indicated that microstructure and surface roughness had a significant influence on the corrosion behavior of the samples. Pits and cracks were observed near the edges of the original surface pores in the as-printed samples after a 1-month immersion in simulated body fluid. The results showed that the acicular microstructure with a small number of surface pores and a smooth surface led to more desirable corrosion resistance.

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The raw/processed data required to reproduce these findings cannot be shared at this time, since the data also forms part of an ongoing study.

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Acknowledgment

The assistance from Professor Christopher A. Brown’s Surface Metrology Laboratory is gratefully acknowledged.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Worcester Polytechnic Institute, 100 Institute Road, Worcester, MA, 01609, USA

    Zhaotong Yang, Yangzi Xu, Richard D. Sisson Jr. & Jianyu Liang

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  1. Zhaotong Yang
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  2. Yangzi Xu
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  4. Jianyu Liang
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Correspondence to Jianyu Liang.

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Yang, Z., Xu, Y., Sisson, R.D. et al. Factors Influencing the Corrosion Behavior of Direct Metal Laser Sintered Ti-6Al-4V for Biomedical Applications. J. of Materi Eng and Perform 29, 3831–3839 (2020). https://doi.org/10.1007/s11665-020-04904-9

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  • DOI: https://doi.org/10.1007/s11665-020-04904-9

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