PSI - Issue 14

Rajesh Sharma et al. / Procedia Structural Integrity 14 (2019) 738–745 Author name / Structural Integrity Procedia 00 (2018) 000–000

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Fig. 2. The stereo fractographs showing slant fracture surface in both (a) and (b).

3.2. Fracture Surface The SEM fracture surface taken at two different magnifications is shown in Fig. 3. Rubbed fracture surface regions are observed here. The explosive at high speed appears to introduce rubbing on the fracture surface. The fracture surface depicts presence of secondary cracks, globular deposits along with pits. The close view of fracture surface is shown in Fig. 4. The overall analysis by energy dispersive spectroscopy (EDS) is displayed in Fig. 4b. The elements O and K are present along with the base material. Similar corrosive elements (K and O) are observed at other regions. Distinct features are not observed on fracture surface because of the presence of rubbing and oxide layer.

Fig. 3. SEM fractographs showing fracture surface at different magnifications.