Effects of Process Parameters and Process Defects on the Flexural Fatigue Life of Ti-6Al-4V Fabricated by Laser Powder Bed Fusion
Year: 2024
Type: article
Abstract: The fatigue performance of laser powder-bed fusion-fabricated Ti-6Al-4V alloy was investigated using 4-point bending testing. Specifically, the effects of keyhole and lack-of-fusion porosities along with surface roughness were evaluated in the context of pore circularity and size and compared with surface roughness parameter, Sa. Surface roughness of Sa = 15 to 7 microns were examined by SEM and the corresponding fatigue performance found to vary by 102 cycles to failure. The S-N curves for the various defects were also correlated with process window examination in laser beam power-velocity (P-V) space.
Source: Materials
DOI: 10.3390/ma17184548
Institution: The University of Texas at El Paso
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,955
Award: G8096874028
OpenAlex ID: W4402659846