Oluwasegun Falodun, Olukayode Akinwamide
This study examines the improvements in microstructure and hardness of Ti-6Al-4V alloys reinforced with 5 wt% TiN and TiB₂. These ceramic reinforcements were incorporated through spark plasma sintering (SPS). Adding Cr and Ni significantly refines the β-phase microstructure and stabilizes its distribution. Meanwhile, TiN particles serve as effective nucleation sites, and the in situ TiB₂ whiskers help pin grain boundaries, promoting dynamic recrystallization. EBSD analysis shows a marked reduction in grain size, decreasing from 8.91 μm in the unreinforced alloy to 5.27 μm in the composite. This analysis also reveals a weak crystallographic texture and a predominance of low-angle grain boundaries, indicative of sub-grain formation. The combined effects of grain boundary refinement, dispersion strengthening from TiN and TiB₂ particles, and β-phase stabilization through the addition of Cr and Ni lead to a significant increase in hardness, rising from 353 HV0.2 in the matrix alloy to 592 HV0.2 in the composite.
@article{cf5a6300-1d67-4377-b525-d932c85c5042,
title={2025 Falodun Microstructural Characterization Ceramic Ti6Al4V},
author={Oluwasegun Falodun and Olukayode Akinwamide},
year={2026},
language={en}
}TY - JOUR TI - 2025 Falodun Microstructural Characterization Ceramic Ti6Al4V AU - Oluwasegun Falodun AU - Olukayode Akinwamide PY - 2026 LA - en ER -
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