PSI - Issue 11

Hizadora Constanza Medina D’Ambros et al. / Procedia Structural Integrity 11 (2018) 114–121 Author name / Structural Integrity Procedia 00 (2018) 000 – 000

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3. Results and discussions

Equations The results of base metal samples present the characterization of the metal base were 365,7MPa steel ultimate tensile strength and 269,7MPa steel yield strength. These values corresponded to those expected according to NBR 8800:2008 (ABNT, 2008). The Fig. 5 and 6 presents the aspect of the samples E-BASE, E-REF, E-HIGH, E-LOW, E-SLAG and E-MOIST after tensile strength results. The crack in all E-HIGH, E-LOW, ESLAG and E MOIST samples were inside the weld joint, just in E-REF the crack was on base metal, this is a indicated of defects in the samples (Kobe Steel, 2015).

Fig. 5. Samples aspect after tensile strength results: (a) E-REF; (b) E-SLAG.

Fig. 6. Samples aspect after tensile strength results: (a) E-HIGH; (b) E-LOW; (c) E-MOIST.

The Table 1 show the defects at weld joint samples E-REF, E-HIGH, E-LOW, E-SLAG and E-MOIST in order to compare the defects presented in each one. All the samples presented defects, as discussed previously the difficulties to maintain constant the parameters causes weld flaws. Eleven defects were found, the E-MOIST and E SLAG presented the larger number of defects (nine and seven defects, respectively) and E-REF the smaller one (four defects).