Tribološke lastnosti Ti6Al4V zlitine za medicinske implantate

Šteharnik, Leon (author), Polajnar, Marko (mentor), Kalin, Mitjan (comentor)

Zlitina Ti6Al4V je eden od primernejših materialov za implementacijo v biološke aplikacije, kot so na primer medicinski implantati. Pri tem se zaradi slabe obrabne odpornosti tega materiala veliko vlaga v raziskave na tem področju. V tem delu smo določili tribološke lastnosti Ti6Al4V zlitine in sicer preko določitve koeficienta trenja in faktorja obrabe, pri čemer smo variirali testne parametre. Tribološki testi so bili izvedeni na recipročnem tribološkem drsnem preizkuševališču z uporabo kontaktne konfiguracije Ti6Al4V zlitine v obliki ploščice in ZrO2 kroglice mazane s solno raztopino fosfata (PBS) pri 37°C. Izmerjeni koeficient trenja je bil šibko odvisen od pritisne normalne sile in se je nekoliko zmanjšal s povečevanjem le-te. Obraba pa se je povečala s povečevanjem drsne hitrosti in normalne sile. Rezultati karakterizacije obrabne sledi na Ti6Al4V zlitini nakazujejo, da je primarni obrabni mehanizem med kontaktnima površinama abrazija, medtem ko na ZrO2 kroglici prihaja do manjše adhezije.

• Language: Slovenian
• Keywords: titanova zlitina Ti6Al4V, tribološko testiranje, koeficient trenja, drsna hitrost, normalna sila, obrabna sled
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FS - Faculty of Mechanical Engineering
• Place of publishing: Ljubljana
• Publisher: [L. Šteharnik]
• Year: 2024
• Number of pages: XI, 29 str.
• PID: 20.500.12556/RUL-159030
• UDC: 621.74:621.7.019:531.4(043.2)
• COBISS.SI-ID: 203126019
• Publication date in RUL: 28.06.2024

ŠTEHARNIK, Leon, 2024, Tribološke lastnosti Ti6Al4V zlitine za medicinske implantate [online]. Bachelor’s thesis. Ljubljana : L. Šteharnik. [Accessed 26 April 2025]. Retrieved from: https://repozitorij.uni-lj.si/IzpisGradiva.php?lang=eng&id=159030

Secondary language

• Language: English
• Title: Tribological properties of Ti6Al4V alloy for medical implants

Abstract

The Ti6Al4V alloy is one of the key materials for implementation in biological applications, such as medical implants. Due to its poor wear resistance, significant research investment is directed towards this field. In this work, we determined the tribological properties of the Ti6Al4V alloy by measuring the coefficient of friction and wear factor, while varying the test parameters. Tribological tests were performed using a reciprocating sliding tribometer with a contact configuration of Ti6Al4V alloy plate and ZrO2 ball, lubricated with a phosphate-buffered saline (PBS) solution at 37°C. The measured coefficient of friction was weakly dependent on the normal load and slightly decreased with its increase. Wear increased with the rise in sliding speed and normal load. The results of the wear track characterization on the Ti6Al4V alloy indicate that the primary wear mechanism between the contact surfaces is abrasion, whereas the ZrO2 ball exhibited minor adhesion.

• Keywords: titanium alloy Ti6Al4V, tribological testing, coefficient of friction, sliding speed, normal force, wear track