PSI - Issue 43

Stanislav Seitl et al. / Procedia Structural Integrity 43 (2023) 113–118 Author name / Structural Integrity Procedia 00 (2022) 000 – 000

115

3

apical angle of 136°. The indentation dimensions d were measured in both diagonals. The average value of the two diagonals was converted into the Vickers Hardness by the formula: HV = 0.189 (F/d 2 ), (1) where F is in N and d is in millimeters. The results of measurement are summarized in Tab. 3. a) PL20-E b) PL10-E

c) PL20-A

d) PL10-A

Fig. 1. Microstructure of AISI 304: PL20-E, PL10-E, PL20-A and PL10-A.

Table 3. Vickers hardness of investigated AISI 304 bars

PL20-E

PL10-E

PL20-A

PL10-A

AISI 304

HV 0.1

241 19.9

233 17.9 7.68

236

253

Standard deviation

4.5 1.9

8.7

Relative standard deviation [%]

8.2

3.43