PSI - Issue 54

Paulo Mendes et al. / Procedia Structural Integrity 54 (2024) 340–353 Mendes et al. / Structural Integrity Procedia 00 (2023) 000–000

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The fully welded steps showed higher hardness values than the root steps, suggesting that the additional heat input during the final steps may have tempered the material. This finding suggests that the microstructure and mechanical characteristics of the root region are influenced by the heat input during the later steps. The final steps can produce a tempering e ff ect that can significantly a ff ect how the weldment behaves mechanically. For the fully welded 60 millimeters welded joint, it is possible that the root area underwent a localized heat treatment to increase the toughness and lessen susceptibility to cracking, as evidenced by the increased hardness in the fully welded steps. Figures 6 and 7 provide a better understanding of how the heat input a ff ects the hardness between the two procedures for a ffi liation B. 3030_1

← B

B →

Fig. 6. A ffi liation B comparison between the two procedures for the J30 welded joint.

3024_1

← B

B →

Fig. 7. A ffi liation B comparison between the two procedures for the J60 welded joint.