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]....

References

References
1.
Ladani
,
L.
,
Razmi
,
J.
, and
Farhan Choudhury
,
S.
,
2014
, “
Mechanical Anisotropy and Strain Rate Dependency Behavior of Ti6Al4V Produced Using E-Beam Additive Fabrication
,”
ASME J. Eng. Mater. Technol.
,
136
(
3
), p.
031006
.10.1115/1.4027729
2.
Dieter
,
G.
,
1988
,
Mechanical Metallurgy
,
McGraw-Hill Book Company
, New York, Chaps. 8–9.
3.
Svensson
,
M.
, and
Ackelid
,
U.
,
2010
, “
Titanium Alloys Manufactured With Electron Beam Melting Mechanical and Chemical Properties
,”
Materials and Processes for Medical Devices Conference (MDM V)
, Minneapolis, MN, Aug. 10–12, pp.
189
194
.
4.
Simonelli
,
M.
,
Tse
,
Y. Y.
, and
Tuck
,
C.
,
2014
, “
Effect of the build orientation on the Mechanical Properties and Fracture Modes of SLM Ti–6Al–4V
,”
Mater. Sci. Eng. A
,
616
, pp.
1
11
.10.1016/j.msea.2014.07.086
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