PSI - Issue 42

Jan Klusák et al. / Procedia Structural Integrity 42 (2022) 1369–1375 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

1371

3

The microstructure of both materials was observed using TESCAN Lyra3 the scanning electron microscope in back scattered electrons (BSE) mode. Figures 1 and 2 show the microstructure of both steels with austenitic grains, and a higher density of  -ferrite particles (indicated by black arrows) in 1.4306 steel. Fig. 2 shows details of the microstructure with annealing twins indicated by white arrows. Vertical direction corresponds to the direction of rolling.

(a)

(b)

Fig. 1. BSE image of microstructure of the steel (a) 1.4306, and (b) 1.4307.

 -ferrite

 -ferrite

annealing twins

annealing twins

(a)

(b)

Fig. 2. Details of the microstructure of the steel (a) 1.4306, and (b) 1.4307 in BSE mode.