PSI - Issue 77

M. Turhan et al. / Procedia Structural Integrity 77 (2026) 543–549 M.Turhan et al. / Structural Integrity Procedia 00 (2026) 000 – 000

545

3

Additionally, the mechanical properties of EOS NickelAlloy HX powder material are shown in Table 2 based on building direction such as vertical building direction, and horizontal building direction and test results are taken as built condition at room temperature [16].

Table 2 Mechanical properties of EOS NickelAlloy HX 3D printed test samples according to data sheet

σ (MPa) 820 ± 50

σ (MPa) 630 ± 50 545 ± 50

Condition

Direction Horizontal

ε (%) 27 ± 8 39 ± 8

E (GPa) 195 ± 20 175 ± 20

As Built (Room Temp)

Vertical

675 ± 50

2.2. Process parameters and support structures

The following parameters were used as default throughout this work as process parameters in Table 3. These parameters were altered on some locations (grip sections) of the test samples where they are supposed to not affect the mechanical properties of the samples but maintain the stability of the experimental prints.

Table 3 The default process parameters as reference parameters

InFill

DownSkin

UpSkin

Type of pattern

Stripe, single exposure

No pattern, single exposure

No pattern, double exposure

Stripe width [mm] Stripe overlap [mm] Laser power [W] Laser speed [mm/s] Hatch distance [mm]

10

- -

- -

0.12 285 960 0.11

145

153 600 0.09

2400 0.05

Layer thickness 3 There were four experimental set-ups to print horizontal test samples. The block supports and cone supports were used (Figure 1). The cone supports were placed at grip sections of the samples to prevent from warpage near to tips which can lead to re-coater collision. The first set up of support parameters were applied as upper and lower hatching teeth mode-on, fragmentation mode-on, and perforation mode-on. 1 3

Figure 1 Experimental set-ups of horizontal samples by changing block and cone (circular features) support at grip sections of the horizontal test samples in 3D on Materialise Magics software.