Unlocking Insights from In-Situ Meltpool Monitoring Data for Additively Manufactured NiTi Components Available to Purchase

The processing of Ni₅₀Ti₅₀ (at.%) alloy via powder bed fusion using a laser beam (PBF-LB) technique has been reported to significantly alter the atomic percentage of Ni in the final NiTi part when compared to the feedstock composition, and the ensuing variations in the phase characteristics and transformation temperatures. Residual stresses are also another challenge in the PBF-LB processing of NiTi. These PBF-LB challenges stem from the choice of laser scanning strategy, and process parameter selection typically defined by volumetric energy density (VED). Heat treatment also plays a crucial role in releasing residual stresses and effectively adjusting or tuning the final properties of as-built NiTi components.