Abstract
Direct aging and solution-aging treatments were implemented on a laser powder bed fusion-processed Ti-6Al-4V alloy to enhance its tribological performance. Dry sliding wear tests over a wide range of normal loads (2.5–40 N) and sliding velocities (50–800 rpm) were employed to investigate their comprehensive wear behavior. The results indicate that high-density Ti3Al precipitates were formed, and the decomposition of α'→α + β occurred during the aging treatments. A higher aging-hardening response of the studied alloy was achieved after the β solution treatment relative to the as-built state. The worn morphologies and wear mechanisms depend significantly on the microstructural characteristics, applied loads, and sliding velocities.
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