Laser powder bed fusion (LPBF) is a robust metal additive manufacturing technique for generation of complex geometries using a high-energy laser beam. NiTi is a promising material for porous biomaterials applications. The use of LPBF for such applications is justified by the complex architecture of porous biomaterials and by the current difficulties in NiTi manufacturing. Elimination of unwanted secondary phases after LPBF of NiTi has been an important research topic in recent years. In this research work, the effect of LPBF process parameters on phase composition, porosity, and surface topography of NiTi parts has been studied using different techniques, including X-ray diffraction, scanning electron microscopy and micro X-ray computed tomography. Three different regimes of process parameters have been proposed for obtaining the single phase B2-NiTi by LPBF technique. The obtained results revealed that high laser power adjusted to high scanning speed reduced the surface roughness and the porosity content in LPBF NiTi products.

激光粉末床熔合（LPBF）是一种强大的金属增材制造技术，可使用高能激光束产生复杂的几何形状。NiTi是用于多孔生物材料应用的有前途的材料。多孔生物材料的复杂结构以及NiTi生产中的当前困难证明了将LPBF用于此类应用是合理的。近年来，消除NiTi的LPBF后不需要的次级相已成为重要的研究课题。在这项研究工作中，使用X射线衍射，扫描电子显微镜和X射线计算机断层扫描等不同技术研究了LPBF工艺参数对NiTi零件的相组成，孔隙率和表面形貌的影响。已经提出了三种不同的工艺参数制度，以通过LPBF技术获得单相B2-NiTi。所得结果表明，调整为高扫描速度的高激光功率可降低LPBF NiTi产品的表面粗糙度和孔隙率。