3D Data for Fatigue in Superalloys
7
The following actions may be incorporated into the workflow for a 3D experiment, depending on the data necessitated: femtosecond laser ablation and pole
piece shutter insert/retract, glancing angle FIB milling (cleanup), stage movements,
precision stage positioning by fiducial alignments with image processing scripts,
detector insert/retracts (EBSD, EDS, BSE), EBSD data collection, EDS mapping,
SE/BSE image collection, image processing for on-the-fly feature identification and
FIB cleanup, automated electron beam tilt alignment and current measurements, and
laser beam stability and power measurements. The example data collection times in
Table 1 have been simplified to the primary detector imaging modes, laser ablation,
FIB cleaning, and stage movements. More details about the TriBeam tomography
setup can be found here [24].
3D datasets of nickel disk material were collected at different resolutions, as
shown in Fig. 3, in order to characterize the γ precipitates, high-resolution twin
structure regions, and large volumes for grain and twin scale information. The
resolution and sizes of the TriBeam datasets are summarized in Table 2.
A γ precipitate dataset was collected from René 88DT using a FEI Quanta 3D
DualBeam FIB-SEM with a ion beam sectioning resolution of 20 nm. A total volume
of 5 × 4.25 × 4.5 μm was reconstructed from 221 slices. BSE images from this
dataset were segmented in the ImageJ/FIJI software package [70] and reconstructed
to measure precipitate characteristics in this René 88DT polycrystalline superalloy.
Fig. 3 TriBeam and FIB serial section datasets were collected from Ni-base disk material at
resolutions to capture (left) large volumes of grain and twin data, (center) a high-resolution dataset
containing detailed twin boundary regions, and (right) the γ precipitates. The precipitate dataset
coloring is showing individual precipitates as different random colors, whereas the grain and twin
scale datasets are colored by IPF coloring
Table 2 Resolution, size, and dimensions of René 88DT 3D EBSD serial section datasets
collected using the TriBeam microscope
Name
Resolution (μm)
Size (voxels)
Dimensions (μm)
Twin scale
0.10 × 0.10 × 0.50
742 × 993 × 140
60 × 70 × 70
Grain scale
0.30 × 0.30 × 0.75
802 × 482 × 199
240 × 145 × 130
Crack
0.30 × 0.30 × 0.75
429 × 757 × 127
120 × 200 × 90
Inclusion
0.55 × 0.55 × 0.75
534 × 802 × 143
400 × 600 × 105
7
The following actions may be incorporated into the workflow for a 3D experiment, depending on the data necessitated: femtosecond laser ablation and pole
piece shutter insert/retract, glancing angle FIB milling (cleanup), stage movements,
precision stage positioning by fiducial alignments with image processing scripts,
detector insert/retracts (EBSD, EDS, BSE), EBSD data collection, EDS mapping,
SE/BSE image collection, image processing for on-the-fly feature identification and
FIB cleanup, automated electron beam tilt alignment and current measurements, and
laser beam stability and power measurements. The example data collection times in
Table 1 have been simplified to the primary detector imaging modes, laser ablation,
FIB cleaning, and stage movements. More details about the TriBeam tomography
setup can be found here [24].
3D datasets of nickel disk material were collected at different resolutions, as
shown in Fig. 3, in order to characterize the γ precipitates, high-resolution twin
structure regions, and large volumes for grain and twin scale information. The
resolution and sizes of the TriBeam datasets are summarized in Table 2.
A γ precipitate dataset was collected from René 88DT using a FEI Quanta 3D
DualBeam FIB-SEM with a ion beam sectioning resolution of 20 nm. A total volume
of 5 × 4.25 × 4.5 μm was reconstructed from 221 slices. BSE images from this
dataset were segmented in the ImageJ/FIJI software package [70] and reconstructed
to measure precipitate characteristics in this René 88DT polycrystalline superalloy.
Fig. 3 TriBeam and FIB serial section datasets were collected from Ni-base disk material at
resolutions to capture (left) large volumes of grain and twin data, (center) a high-resolution dataset
containing detailed twin boundary regions, and (right) the γ precipitates. The precipitate dataset
coloring is showing individual precipitates as different random colors, whereas the grain and twin
scale datasets are colored by IPF coloring
Table 2 Resolution, size, and dimensions of René 88DT 3D EBSD serial section datasets
collected using the TriBeam microscope
Name
Resolution (μm)
Size (voxels)
Dimensions (μm)
Twin scale
0.10 × 0.10 × 0.50
742 × 993 × 140
60 × 70 × 70
Grain scale
0.30 × 0.30 × 0.75
802 × 482 × 199
240 × 145 × 130
Crack
0.30 × 0.30 × 0.75
429 × 757 × 127
120 × 200 × 90
Inclusion
0.55 × 0.55 × 0.75
534 × 802 × 143
400 × 600 × 105