Effects of Ultrasonic Nanocrystal Surface Modification on the Formation of a Nitride Layer in Ti-6Al-4V Alloy
Bauyrzhan Rakhadilov, Nurtoleu Magazov, Zarina Aringozhina, Gulzhaz Uazyrkhanova, Zhuldyz Uazyrkhanova, Auezhan Amanov
TL;DR
This study shows that ultrasonic treatment improves the formation of nitride layers on titanium alloy surfaces, enhancing hardness and wear resistance for biomedical and engineering applications.
Contribution
The novel contribution is demonstrating how optimized ultrasonic nanocrystalline surface modification enhances nitride layer formation and mechanical properties in Ti-6Al-4V alloy.
Findings
Optimized ultrasonic treatment increases surface hardness by up to 25% and elastic modulus by up to 18%.
High-load and elevated-temperature ultrasonic treatment leads to dense TiN/Ti2N layers with improved wear resistance.
SEM and XRD analyses confirm microstructural densification and increased nitride phase intensity.
Abstract
This study investigates the effects of ultrasonic nanocrystalline surface modification (UNSM) on the formation of nitride layers in Ti-6Al-4V alloy during ion-plasma nitriding (IPN). Various UNSM parameters, including vibration amplitude, static load, and processing temperature, were systematically varied to evaluate their influence on microstructure, hardness, elastic modulus, and tribological behavior. The results reveal that pre-treatment with optimized UNSM conditions significantly enhances nitrogen diffusion, leading to the formation of dense and uniform TiN/Ti2N layers. Samples pre-treated under high-load and elevated-temperature UNSM exhibited the greatest improvements in surface hardness (up to 25%), elastic modulus (up to 18%), and wear resistance, with a reduced and stabilized friction coefficient (~0.55). Scanning electron microscopy (SEM) and X-ray diffraction (XRD) analyses…
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Taxonomy
TopicsMetal and Thin Film Mechanics · Titanium Alloys Microstructure and Properties · Advanced materials and composites