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The NiTi alloy has attracted significant interest owing to its notable wear and corrosion resistance, suggesting the significant promise of utilizing additively manufactured NiTi alloys in tribological applications. In this study, dry sliding wear tests with sliding velocity of 0.1m/s for total distance of 250m at room temperature, 50 °C, 100 °C, and 200 °C were carried out on samples of NiTi alloy samples fabricated using Laser-Powder and Laser Wire Directed Energy Deposition (LP-DED and LW-DED) processes. Enhanced friction and wear behavior of LP-DED samples were captured at lower temperatures due to higher hardness and stable dominating NiTi B2 austenite phase in the sample microstructure as confirmed from XRD analysis. Accumulated transferred material at lower temperatures played a crucial role in modifying the wear mechanisms. However, at higher temperature both LP-DED and LW-DED samples presented similar wear mechanisms.
Choi et al. (Fri,) studied this question.