PSI - Issue 42

Mihai A. Popescu et al. / Procedia Structural Integrity 42 (2022) 1626–1633 M.A. Popescu et al. / Structural Integrity Procedia 00 (2022) 000–000

1628

3

Fig. 1. Specimen extraction location.

Table 1. Chemical composition of Base metals. Element

S355 J0 + N [%]

S355 J2 + N [%]

C

0.17 1.49 0.24 0.01 0.03 0.03 0.03

0.16 1.38 0.34

Mn

Si

P

0.011 0.014 0.082 0.017

Cu Ni Cr Mo

< 0.005

0.0028

Al

0.031

- -

V

< 0.005

Table 2. Chemical composition of the flux. Flux Analysis

Specimen 1 [%]

Specimen 2 [%]

CaO + MgO

27 20 28 16

35 25 20 15

CaF 2

Al 2 O 3 + MnO SiO 2 + TiO 2

weld and the welding e ff ects on the material, the specimens need to undergo a specific procedure which involves surfaces preparations and chemical etching. Two welded samples were obtained from both specimens, sectioned perpendicularly to the welding direction, and reduced in size in order to ensure easier handling. Dimensions are 83 mm x 59 mm x 28 mm from S1 and 80 mm x 59 mm x 40 mm from S2. initially, the examined surfaces were polished up to a mirror-like appearance. Once achieved this step, the surfaces were chemically etched for optical examination by a Zeiss Axiophot optical microscope connected to a video camera. This permitted the capture of the required images for the microstructure analysis. Further testing with the same specimens required a new chemical etching, this time to obtain the macrostructure and reveal the individual weld passes and the Heat-A ff ected Zone (HAZ).