In the present work, the mechanical response of additively manufactured mini
CT specimens made of Inconel 718 alloy were studied when subjected to tensile
loading. The specimens were printed with two build orientations, flat and up-
right and with +/- 45°C and 0°/90° raster orientations. The effect of the printing
parameters on the fracture parameters was evaluated. The tests were monitored
using X-ray tomography. Kinematic fields were measured via Finite Element
based (global) Digital Volume Correlation (DVC). A special mesh accounting
for the crack (i.e., allowing for displacement discontinuity along the crack plane)
was used. These kinematics fields were used to extract Linear Elastic Fracture
Mechanics parameters by using William's series. The mesh adaption greatly
improved the correlation residuals and the LEFM parameters were successfully
extracted from the measured displacement fields using the aforementionned pro-
cedure. It is shown that the fracture toughness and Young's Modulus of the
sample printed in the vertical direction decreased compared to the other two
printed horizontally. Conversely, there were no significant differences between
the two ‘flat' samples with different raster angles.
| Subject : | : | oral |
| Topics | : | 4-2 - In situ Mechanics |
| Topics | : | YOUNG SCIENTIST AWARD - Please tick this line to apply |
| PDF version | : |  PDF version |
