Failure mechanism data related to the crack path of additively manufactured Ti-6Al-4V reiforced by nano-sized particules
Various kinds of data (i.e., Photographs, Matlab Executable Script, Excel files, EBSD data set) has been gathered in the present repository to give a comprehensive overview of the fracture surface morphology observed on the fracture surface of a novel metallic matrix composite (MMC) based Ti-6Al-4V alloy processed by laser-powder bed fusion (L-PBF) technique. Alike its unreinforced counterparts, such additively manufactured (AMed) Ti-6Al-4V tends to present clear inclined planes on the fracture surface macroscopically (the so-called "stair-like" pattern). In other words, the crack path does not obey to the mode I fracture plane in this zone. Furthermore, based on eight (8) different specimens, the fraction of stair-like pattern occurrence on the fracture surface varies from 4.6 to 17.6%. Outside this stair-like pattern, the fracture surface presents mode I fracture plane and shear lip next to lateral surface of the specimen. To clarify the reason for this peculiar behavior, one specimen presenting such a fracture surface pattern has been sliced at a position where the fracture surface presents both stair-like pattern and mode I fracture surface mode. The obtained surface was finished by colloidal silica suspension to undertake electron back scattered diffraction (EBSD) characterizations at several key positions. (i) One EBSD acquisition has been operated along an inclined plane (corresponding to Fig. 2(a) of the related Data in Brief). (ii) One EBSD acquisition has been operated at the transition between the stair-like pattern and the mode I fracture mode (corresponding to Fig. 2(b) of the related Data in Brief). (iii) One EBSD acquisition has been operated at a location where mode I fracture mode occurs (corresponding to Fig. 2(c) of the related Data in Brief). For each position, based on the EBSD data (raw files .osc available in the present repository) the local microstructure has been analyzed via crystallographic and geometrical orientation of the primary α- grains. Furthermore, one particular crack path observed in one "valley" of the stair-like pattern has revealed a kink, such as the local crack path is almost perpendicular to the loading direction, which is an extremely detrimental configuration from the energy viewpoint. An EBSD acquisition of this zone (corresponding to Fig. 3 of the related Data in Brief) has been carried out.
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A tensile test campaign under quasi-static loading has been operated on a novel nano-yttria-stabilized zirconia reinforced Ti-6Al-4V alloy processed by laser-powder bed fusion technique in air and at room temperature. Alike its unreinforced additively manufactured counterparts, observation of the fracture surface by scanning electron microscopy (SEM) has revealed the formation of a series of macroscopically inclined fracture surface plane, so-called "stair-like" pattern. To clarify the underlining mechanism, one of the specimen was sliced at the position of these inclined planes, finishing the new surface by colloidal silica suspension to undertake an electron back scattered diffraction (EBSD) analysis at various positions along the fracture surface.