TY - JOUR
T1 - Nano-mechanical Characterization of SLM-Fabricated Ti6Al4V Alloy
T2 - Etching and Precision
AU - Dareh Baghi, Alireza
AU - Ghomashchi, Reza
AU - H. Oskouei, Reza
AU - Ebendorff-Heidepriem, Heike
PY - 2019/10/1
Y1 - 2019/10/1
N2 - Abstract: In this research, we are reporting that the nanoindentation results vary between etched and unetched SLM-fabricated titanium alloy (Ti6Al4V) in spite of the same microhardness values. The dimensionless roughness parameter α, as a metric for the sensitivity of nano-hardness values on the surface roughness, is used to highlight whether etching plays any role. Although the value of α for both samples is below the recommended maximum value, the effect of etching is still significant. The hypothesis for a 19% increase in nano-hardness of etched samples is also discussed in this paper. Furthermore, the maximum proposed value of α (α < 0.05) appeared to be invalid for SLM-fabricated titanium and a lower value of α may need to be proposed as a critical value.
AB - Abstract: In this research, we are reporting that the nanoindentation results vary between etched and unetched SLM-fabricated titanium alloy (Ti6Al4V) in spite of the same microhardness values. The dimensionless roughness parameter α, as a metric for the sensitivity of nano-hardness values on the surface roughness, is used to highlight whether etching plays any role. Although the value of α for both samples is below the recommended maximum value, the effect of etching is still significant. The hypothesis for a 19% increase in nano-hardness of etched samples is also discussed in this paper. Furthermore, the maximum proposed value of α (α < 0.05) appeared to be invalid for SLM-fabricated titanium and a lower value of α may need to be proposed as a critical value.
KW - Nanoindentation
KW - Microindentation
KW - Titanium alloys
KW - Selective laser melting (SLM)
UR - http://www.scopus.com/inward/record.url?scp=85074102926&partnerID=8YFLogxK
U2 - 10.1007/s13632-019-00581-w
DO - 10.1007/s13632-019-00581-w
M3 - Article
SN - 2192-9262
VL - 8
SP - 749
EP - 756
JO - Metallography, Microstructure, and Analysis
JF - Metallography, Microstructure, and Analysis
IS - 5
ER -