PSI - Issue 20

Sivtsev M.N. et al. / Procedia Structural Integrity 20 (2019) 148–153 Sivtsev M.N. et al. / Structural Integrity Procedia 00 (2019) 000 – 000

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grain size in the zones obtained at stationary welding (average grain diameter - 4.50 microns), i.e. structure grinding set by 18%.

Fig. 4. Comparison of the sizes of the HAZ at temperatures of 21 0 C (red line) and - 42 0 C (blue line).

a

b

c

d

Fig. 5. The structure of the HAZ (x100): a) adaptive pulse-arc mode at t = + 21 0 C, b) a stationary mode when t = + 21 0 C, c) adaptive pulse-arc mode at t = - 42 0 C, d) a stationary mode when t = - 42 0 C.