Effect of scanning strategies on the microstructure and mechanical properties of Ti–15Mo alloy fabricated by selective laser melting

Grain Morphology and Mechanical Properties Tailoring of Inconel 625 Alloy Fabricated by Laser Powder Bed Fusion

“…However, the intensity of the diffraction peaks observed in the xy ‐plane and xz ‐plane was found to vary considerably based on the scanning strategy employed, revealing that the crystal texture is dependent on the scanning strategy. [ 19 ] To further investigate the crystal texture, EBSD analysis was employed, and the results will be presented in the following sections.…”

“…The EDX maps present a uniform composited of Ni, Nb, Fe, Mo, Gr, Al, Ti, and O over the entire field of view. Even though the entire LPBF process is conducted in a protective atmosphere of high‐purity argon, the residual oxygen in the powder and the gaps of powder particles are inevitable, [ 19 ] which leads to an increase in the oxygen content of the LPBF‐processed Inconel 625 alloy compared to the raw powder as listed in Table 1. The distribution of elemental content of samples I–IV shows no significant fluctuation as presented in Table 2 , indicating the effect of the scanning strategy on the element content of the LPBF‐processed Inconel 625 alloy is negligible.…”

“…In the LPBF process, the application of angular difference between each melt layer, by methods such as scanning strategy, can disrupt the continuity of grain growth in the vertical direction and produce a more randomly orientated equiaxed grain structure. [ 19,26 ]…”

“…This enhancement can be attributed to the extremely high cooling rates inherent in the LPBF process, which promote the formation of fine grains and induce significant residual stresses, leading to superior strength. [ 19 ] Figure 10c shows the stress–strain curve of tensile parts with four scanning strategies, which can more directly see the deformation process of the sample. Figure 10d presents the work hardening curve of LPBF‐fabricated parts, which shows that all of samples with obvious work hardening phenomenon.…”

Effect of Scanning Strategies on the Microstructure and Mechanical Properties of Ti-22Al-25Nb Alloy Fabricated through Selective Laser Melting

“…The results revealed that a high-density dislocation network and a favorable phase constitution could enhance the mechanical properties of Ti-22Al-25Nb alloy. The advantage of the SLM technique is its ability to combine different energy beam parameters, which comprise scanning speed, scanning strategy, laser energy density, and depositional parameters (e.g., width and lap rate between deposition channels, the thickness of single deposition layers, and the total number of layers) [16,17].…”