Publications
In-situ alloying of NiTiNb ternary shape memory alloys via laser powder bed fusion using pre-alloyed NiTi and elemental Nb powders: Microstructure, phase transformation behavior and functional properties KU Leuven
Laser powder bed fusion (L-PBF) provides not only the advantage to make geometrically complex structures, but also the potential for in-situ alloying. In this work, (NiTi)100–xNbx (x = 1, 3, 5, 9 at%) ternary shape memory alloys were in-situ synthesized through L-PBF using a mixture of pre-alloyed near-equiatomic NiTi and elemental Nb powders. Low-Nb (1, 3 at%) alloys exhibit coarse columnar grains and high cracking tendency, while high-Nb (5, 9 ...
Micro-mechanical deformation behavior of heat-treated laser powder bed fusion processed Ti-6Al-4V KU Leuven
Processing of hydroxyapatite (HA)–Ti–6Al–4V composite powders via laser powder bed fusion (LPBF): effect of HA particle size and content on the microstructure and mechanical properties KU Leuven
This research study examines the influence of hydroxyapatite (HA) powder particle size and content on the processability, microstructure, and mechanical properties of the laser powder bed fusion (LPBF) fabricated Ti–6Al–4V (Ti64)-HA composites. For this purpose, various Ti64-HA composite powders were produced, and the effects of the HA particle size and content on the optical reflectance were investigated. Composite powders and the monolithic ...
Size effect on the microstructure, phase transformation behavior, and mechanical properties of NiTi shape memory alloys fabricated by laser powder bed fusion KU Leuven
In this work, NiTi samples with different thicknesses (0.15–1.00 mm) were fabricated by laser powder bed fusion (LPBF) under variable scanning speeds (500–1200 mm s–1). The densification behavior, phase transformation behavior, and mechanical properties of the sample with different thicknesses are studied. The results indicate a strong size effect in the LPBF-fabricated NiTi alloy. The decrease of the sample thickness results in (i) the increase ...