Titanium (Ti)-based alloy is extensively used in the biomedical field due to its properties that promote osseointegration. The present work deals with an experimental study on the effect of microcutting of Ti–6Al–7Nb on corrosion resistance and surface characteristics for enhanced biocompatibility. Experiments were carried out by using Taguchi L9 orthogonal array with process variables include cutting speed (vc), feed per tooth (fz), and depth of cut (ap). Microslot of size 700 µm for a length of 10 mm was made using high-speed micromachining station under wet condition. Surface morphology study was carried out using a scanning electron microscope and the inference was made. It is inferred that lower vc of 31.4 m/min and higher ap condition of 200 μm yield more microparticle adhesion and burr formation. At higher vc, minimum defects were found which results in fine surface finish. Potentiostat setup was used for corrosion resistance measurement, and corresponding Icorr values were obtained from potentiodynamic polarization curve. Icorr values are found as minimum at higher vc and lower ap conditions. Changes in surface characteristics are analyzed after corrosion study. It is observed that at higher vc and lower ap conditions, Ti–6Al–7Nb alloy exhibits higher corrosion resistance under in vitro condition that can promote osseointegration.
Micromilling Ti–6Al–7Nb alloy Corrosion study Surface morphology Biocompatibility
This is a preview of subscription content, log in to check access.
We would like to deliver our profound thanks to Department Science and Technology—Science and Engineering Research Board (DST-SERB), Government of India, for providing financial support through the Research Project No: ECR/2016/001330 to carry out this work.
Gepreel MA, Niinomi M (2013) Biocompatibility of Ti-alloys for long-term implantation. J Mech Behav Biomed Mater 20:407–415CrossRefGoogle Scholar
Novikova GE (2011) Introduction to corrosion of bio implants. Prot Met Phys Chem Surf 47(3):372–380CrossRefGoogle Scholar
Eisenbarth E, Velten D, Muller M, Thull R, Breme J (2004) Biocompatibility of β-stabilizing elements of titanium alloys. Biomaterial 25(26):5705–5713CrossRefGoogle Scholar
Al-Mobarak NA, Al-Swayih AA, Al-Rashoud FA (2011) Corrosion behavior of Ti–6Al–7Nb alloy in biological solution for dentistry applications. Int J Electrochem Sci 6:2031–2042Google Scholar
Tamilselvi S, Raman V, Rajendran N (2006) Corrosion behaviour of Ti–6Al–7Nb and Ti–6Al–4 V ELI alloys in the simulated body fluid solution by electrochemical impedance spectroscopy. Electrochim Acta 52(3):839–846CrossRefGoogle Scholar
Manivasagam G, Dhinasekaran D, Rajamanickam A (2010) Biomedical implants: corrosion and its prevention—a review. Recent Pat Corros Sci 2(1):40–54CrossRefGoogle Scholar
Fleck C, Eifler D (2010) Corrosion, fatigue and corrosion fatigue behavior of metal implant materials. Especially titanium alloys. Int J Fatigue 32(6):929–935CrossRefGoogle Scholar
Mohan L, Anandan C, Rajendran N (2015) Electrochemical behavior and effect of heat treatment on morphology, crystalline structure of self-organized TiO2 nanotube arrays on Ti–6Al–7Nb for biomedical applications. Mater Sci Eng C 50:394–401CrossRefGoogle Scholar
Luiz de Assis S, Wolynec S, Costa I (2006) Corrosion characterization of titanium alloys by electrochemical techniques. Electrochim Acta 51(8–9):1815–1819CrossRefGoogle Scholar
Kobayashi E, Wang TJ, Doi H, Yoneyama T, Hamanaka H (1998) Mechanical properties and corrosion resistance of Ti–6Al–7Nb alloy dental castings. J Mater Sci Mater Med 8:567–574CrossRefGoogle Scholar
Chrzanowski W (2008) Corrosion study of Ti6Al7Nb alloy after thermal, anodic and alkali surface treatments. J Achiev Mater Manuf Eng 31(2):10Google Scholar
Babik O, Czan A, Holubjak J, Kamenik R, Pilc J (2016) Non-destructive analysis of basic surface characteristics of titanium dental implants made by miniature machining. Technol Eng 13(2):28–30Google Scholar
Lavos-Valereto IC, Nig KE Jr, Rossa C Jr, Marcantonio E Jr, Zavaglia AC (2001) a study of histological responses from Ti–6Al–7Nb alloy dental implants with and without plasma-sprayed hydroxyapatite coating in dogs. J Mater Sci Mater Med 4:273–276CrossRefGoogle Scholar
Szewczenko J, Marciniak J, Kajzer W, Kajzer A (2016) Evaluation of corrosion resistance of titanium alloys used for medical implants. Arch Metall Mater 61(2):695–700CrossRefGoogle Scholar
Chehroudi B, McDonnell D, Brunette DM (1997) The effects of micromachined surfaces on formation of bone like tissue on subcutaneous implants as assessed by radiography and computer image processing. J Biomed Mater Res 34(3):279–290CrossRefGoogle Scholar
Leo Kumar SP, Jerald J, Kumanan S, Prabakaran R (2014) A review on current research aspects in tool-based micromachining processes. Mater Manuf Processes 29(11–12):1291–1337CrossRefGoogle Scholar
Asad ABMA, Masaki T, Rahman M, Lim HS, Wong YS (2007) Tool-based micro-machining. J Mater Process Technol 192–193:204–211CrossRefGoogle Scholar
Leo Kumar SP (2018) Experimental investigations and empirical modeling for optimization of surface roughness and machining time parameters in micro end milling using genetic algorithm. Measurement 124:386–394CrossRefGoogle Scholar
Lauro CH, Sergio LM, Ribeiro F, Brandao LC, Davim PJ (2016) Analysis of behaviour biocompatible titanium alloy (Ti–6Al–7Nb) in the micro-cutting. Measurement 93:529–540CrossRefGoogle Scholar
Durakbasa NM, Akdogan A, Vanli AS, Bulutsuz AG (2016) Optimization of end milling parameters and determination of the effects of edge profile for high surface quality of AISI H13 steel by using precise and fast measurements. Measurement 68:429–439Google Scholar