Page 381 - IJB-10-2

International Journal of Bioprinting AM evaluation of medical device companies

Table 5. Summary of the micrographs analysis from the eight samples evaluating porosity in the periphery and the center of the
parts as well as grain morphology and phases
Microstructure
Porosity in the periphery Porosity in the center Grain morphology and phases
P1
(C1)

Discontinuities in the surface that also Several discontinuities of small size. Heterogeneous acicular morphology, dendritic
penetrate toward the center of the part distribution. Columnar grains, α phase
originating cracks. Small voids of spherical alternated with β phase.
morphology around the matrix.
P2
(C2)

Voluminous discontinuities at the edge of A few discontinuities of small size. Very heterogeneous acicular morphology,
the part with rounded globular shape. dendritic distribution. Thinner columnar
grains, α phase alternated with β phase.
P3
(C3)

Gas porosity, small voids of spherical Homogeneous distribution of numerous Heterogeneous thinner grain morphology,
morphology. small discontinuities of globular shape. dendritic distribution. Columnar grains.
More homogeneous structure.
P4
(C4)

No defects in the surface, spherical discon- Low content of porosity. Heterogeneous acicular morphology, dendritic
tinuities of small size toward the center. distribution. Columnar grains, α phase alter-
nated with β phase.
Continued...

Volume 10 Issue 2 (2024) 373 doi: 10.36922/ijb.0140