PSI - Issue 2_B

Benjamin Sarre et al. / Procedia Structural Integrity 2 (2016) 3569–3576

3573

Benjamin Sarre et al. / Structural Integrity Procedia 00 (2016) 000–000

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Fig. 5. Localization and geometries of mechanical test specimens, a) 3D view of the specimens, b) Specimen geometry, transversal welded structure –TWS– and base metal specimen –BMS–, c) Specimen geometry longitudinal welded structure –LWS–

LWS

0 200 400 600 800 True stress MPa ( (1+ conv )) 1000 1200 0

0,05 True strain (ln(1+ conv )) ε : 10 −3 s −1 TWS 0,1

BMS

0,15

Fig. 6. Stress - strain curves for longitudinal specimen –LWS, transversal specimen –TWS– and base metal –BMS–

Digital image correlation is used to calculate strain field during mechanical testing. As shown in Fig. 7, the strain is localized in the BM. Fig. 7 illustrates the strain distribution throughout the specimen. It appears that the strain level in the FZ is much more lower than in the BM. Similar observations were done by (Gao et al. 2013).