Issue 46

I. Čamagić et alii, Frattura ed Integrità Strutturale, 46 (2018) 371-382; DOI: 10.3221/IGF-ESIS.46.34 374 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. Specimen designation Testing temperature,  C Yield stress, R p0.2 , MPa Tensile strength, R m , MPa Elongation1, A, % Fracture location WJ-1-1 295 451 19.2 Expl. PM WJ-1-2 20 285 448 20.4 Expl. PM WJ-1-3 291 454 19.7 Expl. PM WJ-2-1 217 293 26.3 Expl. PM WJ-2-2 540 205 285 25.6 Expl. PM WJ-2-3 211 287 26.9 Expl. PM 1 measured at L 0 = 100mm, as comparative value (not as a material property). Table 5 : Results of tensile testing of the welded joint. 0 5 10 15 20 25 30 0 100 200 300 400 500 600 WJ-1-1 20 o C Stress, R, MPa Elongation, A, % 0 5 10 15 20 25 30 0 100 200 300 400 500 600 WJ-2-1 540 o C Stress, R, MPa 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].