Authors:
Thuli Mkhaliphi (1), Thorsten Becker (2), Xola Madyibi (1), Louis Louw (2)
1- Department of Industrial Engineering, Stellenbosch University, South Africa
2- Centre for Materials Engineering, University of Cape Town, South Africa
Abstract:
The study investigated the effect of the laser scanning strategy on the microstructural and material properties of the Ti-4.7Mo-4.5Fe alloy produced using laser powder bed fusion through in-situ alloying. The four scanning strategies used for the study were meander rotated at 45°, bi-directional alternating and rotated at 45° and 67° (Bi-45° and Bi-67°) and the Island. Cylindrical samples and tensile specimens, printed horizontally, were produced to investigate the microstructural and mechanical properties of the material, respectively. The study highlights and discusses the correlation between the amount of porosity, partially melted molybdenum, density, grain refinement, and the scanning strategies. The micro-hardness of the samples ranged between 451 and 484 HV with a minimum ultimate tensile strength (UTS) of 1000 MPa and minimum elongation% of 8%. The results showed that the Bi-45° and the Island laser scanning strategies are better suited for producing Ti-4.7Mo-4.5Fe alloy.
DOI:
https://doi.org/10.59499/EP246282627
