The paper by Ladani et al. [1] presents an investigation of the mechanical properties, including anisotropy and strain rate sensitivity, of Ti6Al4V test specimens fabricated using the electron beam melting (EBM) additive manufacturing method. The authors use tensile testing and nanoindentation tests on fabricated Ti6Al4V specimens of different build orientations. Analyses of the results include calculating strain rate sensitivity, examining fracture surfaces of the sample pieces, and interpreting nanoindentation data. This discussion of the paper [1] highlights and critiques some key elements of the work, namely, the build orientations used to assess mechanical anisotropy, the tensile testing procedures and reporting, and the strain rate sensitivity observations, as mentioned in Ref. [2].
The authors fabricated test specimens in three different build orientations, shown in Fig. 1 [1]. This seems to be consistent with others' work [3]. However, both the flat-built and...
