PSI - Issue 21

E.F. Akbulut Irmak et al. / Procedia Structural Integrity 21 (2019) 190–197 E. F. Akbulut Irmak et al. / Structural Integrity Procedia 00 (2019) 000 – 000

193

4

method, Lei et al. (2018). To investigate these effects in detail, studies started with 3 mm of thickness. According to a research by Ahmed et al. (2019), it was proved that the dimensional imperfection decreased with increasing sample thickness and the error reduces to less than 0.3% for thickness greater than 2 mm. Considering all the findings in the study, the idea of starting the research with a 3 mm of thickness for SLM AlSi10Mg specimens is supported.

a

b

Figure 2. Small tensile tests specimens; a) uniaxial and b) notched

The gauge lengths used in the determination of the displacement are seen in Table 3.

Table 3. Gauge length used in the experiments

Specimen type

Gauge length (mm)

Tensile Notched

L 0 = 10 L 0 = 15

4. Experimental Results Figure 3 shows the experimental results of the anisotropic material. Uniaxial tensile specimens with 0-degree reached notably higher yield stress values and lower elongation, whereas 45 and 90- degree specimens have lower yield stress values and higher elongation property. It is also clear that notched tensile specimens with 0-degree show brittle behavior while the others have brittle-ductile deformation behavior.

a

b

Figure 3. Tensile test results; a) uniaxial and b) notched