PSI - Issue 50

V. Ilinykh Artem et al. / Procedia Structural Integrity 50 (2023) 113–118 Illinykh Artem V. et al./ Structural Integrity Procedia 00 (2023) 000 – 000

116

4

Fig. 3. Tensile strain diagrams for specimens from ASP35 powder grown in different directions.

Table 1. Tensile mechanical properties of samples from ASP35 powder grown in different directions.

conditional tensile yield strength,

relative narrowing, Ψ, %

relative elongation, δ, %

tensile strength σ b , Mpa

Young’s modulus E, Gpa

proportionality limit,

build direction, º

σ 0,2 , MPa

σ pt , Mpа

0

71

418 415 409 430 448

202 212 195 202 197

260 266 254 261 260

6,2 5,2 5,1 4,7 5,1

4,6 4,8 3,2 5,4 5,7

30 45 60 90

72,5

71 69

70,5

Anisotropy coefficient, (a max -a min ) /a max *100%

4,8

8,7

8

4,5

24

44

According to the test system Instron Electopuls E10000 and the three-dimensional digital optical system Vic-3D (Fig. 4a and 4b) strain diagrams (Fig. 4c) were built for samples and workpieces for samples. The workpieces for the samples were subjected to loading in the elastic region to determine only the shear modulus. The samples were subjected to loading until failure. From the diagrams the mechanical characteristics of the material in torsion were obtained for samples grown at angles: 0, 30, 45, 60, and 90º to the substrate plane. The obtained averag e values of mechanical characteristics for torsion are presented in table 2.

a

b

c

Fig. 4. (a) an example of twist angle fields on a workpiece, b) an example of twist angle fields on a sample c) combined torsion strain diagrams