Issue 41

G. G. Cunto et alii, Frattura ed Integrità Strutturale, 41 (2017) 332-338; DOI: 10.3221/IGF-ESIS.41.44

Figure 1: Typical Stress x Strain curves for different zones in the welded pipe.

Ramberg-Osgood α n

Pipe Zone

σ 0 [MPa]

σ R [MPa]

σ f [MPa]

Elong. [%]

Specimen

Orientation

BM1 BM2 BM3 BM4 BM5 BM6 WM1 WM2 WM3 HZ1 HZ2 HZ3

Longitudinal Longitudinal Longitudinal Transverse Transverse Transverse Longitudinal Longitudinal Longitudinal Longitudinal Longitudinal Longitudinal

166 167 149 167 177 175 360 358 354 249 249 265

483 481 458 459 473 476 463 454 455 495 486 481

325 324 303 313 325 326 412 406 405 372 368 373

30.7 30.1 31.8 30.1 31.8 32.2 11.7 16.7 17.2 14.7 13.8 9.0

8.0 7.7 8.7 8.2 7.3 7.4 1.3 1.2 1.3 2.7 2.4 2.0

3.4 3.4 3.2 3.5 3.7 3.7 9.9 9.2 5.4 5.5 6.2

Base Material AISI 316LN

Weld AISI 316L

11.4

HAZ

Table 2: Results of hot tensile tests.

Figure 2: Typical J-R curves for different zones in the welded Pipe.

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