TY - JOUR
T1 - Tensile anisotropy of powder bed fusion steel 316L
T2 - A practical study on the effect of build orientation
AU - O’Neill, Ivan
AU - Dayanand, Aashrith
AU - Keaveney, Shane
AU - Kourousis, Kyriakos I.
N1 - Publisher Copyright:
© IMechE 2024.
PY - 2024/10
Y1 - 2024/10
N2 - This study investigated the tensile anisotropy of steel 316L fabricated via laser powder bed fusion (L-PBF), built at different orientations. Tensile tests were performed on as-built L-PBF specimens produced at 0°, 15°, 30°, 45°, 60° and 90° angles. The yield strength, ultimate tensile strength and elasticity modulus experienced a decrease with an increasing build angle. Conversely, elongation at fracture increased as the build angle increased. The Elasticity modulus was found to be substantially lower than the nominal values reported in the material data sheet of the L-PBF equipment manufacturer. Fractography performed via Scanning Electron Microscopy (SEM) has found indications of porosity and lack of fusion that may have contributed to lower Elasticity modulus and an overall impacted mechanical performance. A complementary powder quality analysis has offered further insights on this and provided indications on the powder recycling impact.
AB - This study investigated the tensile anisotropy of steel 316L fabricated via laser powder bed fusion (L-PBF), built at different orientations. Tensile tests were performed on as-built L-PBF specimens produced at 0°, 15°, 30°, 45°, 60° and 90° angles. The yield strength, ultimate tensile strength and elasticity modulus experienced a decrease with an increasing build angle. Conversely, elongation at fracture increased as the build angle increased. The Elasticity modulus was found to be substantially lower than the nominal values reported in the material data sheet of the L-PBF equipment manufacturer. Fractography performed via Scanning Electron Microscopy (SEM) has found indications of porosity and lack of fusion that may have contributed to lower Elasticity modulus and an overall impacted mechanical performance. A complementary powder quality analysis has offered further insights on this and provided indications on the powder recycling impact.
KW - Laser powder bed fusion
KW - anisotropy
KW - build orientation
KW - steel 316L
KW - tensile properties
UR - http://www.scopus.com/inward/record.url?scp=85187723208&partnerID=8YFLogxK
U2 - 10.1177/14644207241238916
DO - 10.1177/14644207241238916
M3 - Article
AN - SCOPUS:85187723208
SN - 1464-4207
VL - 238
SP - 2035
EP - 2042
JO - Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications
JF - Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications
IS - 10
ER -
