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SEM micrographs showing the tensile fracture surface of the F-SP-T-2 specimen: (a) low-scale SEM photograph of near initial fracture; (b) magnification view of rectangle ① in (a); (c) magnification view of rectangle ③ in (b); (d) magnification view of rectangle ② in (a); and (e) magnification view of rectangle ④ in (d).
