Issue 46

I. Čamagić et alii, Frattura ed Integrità Strutturale, 46 (2018) 371-382; DOI: 10.3221/IGF-ESIS.46.34

Testing results of butt welded joint specimens by transverse tension at room temperature of 20  C and working temperature of 540  C are given in Tab. 5, [1]. Typical tensile stress-elongation curve for specimen of butt welded joint marked as WJ-1 1, tested at room temperature is shown in Fig. 3, left [1], and for specimen marked as WJ-2-1, tested at working temperature is shown in Fig. 3, right.

Figure 2 : Specimens for tensile testing at working temperature.

Testing temperature,  C

Specimen designation

Yield stress, R p0.2 , MPa

Tensile strength, R m , MPa

Elongation1, A, %

Fracture location Expl. PM Expl. PM Expl. PM Expl. PM Expl. PM Expl. PM

WJ-1-1 WJ-1-2 WJ-1-3 WJ-2-1 WJ-2-2 WJ-2-3

295 285 291 217 205 211

451 448 454 293 285 287

19.2 20.4 19.7 26.3 25.6 26.9

20

540

1 measured at L 0

= 100mm, as comparative value (not as a material property).

Table 5 : Results of tensile testing of the welded joint.

600

600

WJ-2-1 540 o C

WJ-1-1 20 o C

500

500

400

400

300

300

200

200

Stress, R, MPa

Stress, R, MPa

100

100

0

0

0

5

10

15

20

25

30

0

5

10

15

20

25

30

Elongation, A, % Elongation, A, % Figure 3 : Stress-elongation diagram of a butt welded joint specimen WJ-1-1 (left) and specimen WJ-2-1 (right).

Testing results of specimens of the new PM at room temperature of 20  C and working temperature 540  C are given in Tab. 6, [1]. Testing of exploited PM was not performed, because during the testing of welded joint specimens all tested specimens fractured in the exploited PM, which provided us with the properties of exploited PM. typical tensile stress-elongation curve for specimen denoted by PM-1-1N, taken from the new PM and tested at room temperature is given in Fig. 4, left [1], and for specimen PM-2-1N, also taken from the new PM, but tested at working temperature, is shown in Fig. 4, right [1].

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