PSI - Issue 14

Priti Kotak Shah et al. / Procedia Structural Integrity 14 (2019) 242–250 Priti et. al. / tructural Integrity Procedia 00 (2018) 000–000

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Fig. 4. Typical load, load line displacement and DCPD data plot obtained during room temperature fracture toughness tests and the tangent lines drawn to find the crack growth initiation point for (a) axial notched specimen (b) transverse notched specimen test .

Fig. 5. Typical load, load line displacement and DCPD data plot obtained during 300 0 C fracture toughness tests and the tangent lines drawn to find the crack growth initiation point for (a) axial notched specimen (b) transverse notched specimen test.

Fig. 6. J-tested (a) axial notched and (b) transverse notched specimens.

and then fracture by fatigue cycling. The fracture surface of the specimens were photographed to measure the initial and final crack length by image analysis technique. Typical fracture surfaces of the tested specimens are shown in Figure 7.