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Type: Journal article
Title: Nano-mechanical characterization of SLM-fabricated Ti6Al4V alloy: etching and precision
Author: Dareh Baghi, A.
Ghomashchi, R.
Oskouei, R.H.
Ebendorff-Heidepriem, H.
Citation: Metallography Microstructure and Analysis, 2019; 8(5):749-756
Publisher: Springer Nature
Issue Date: 2019
ISSN: 2192-9262
Statement of
Alireza Dareh Baghi, Reza Ghomashchi, Reza H. Oskouei, Heike Ebendorff-Heidepriem
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.
Keywords: Nanoindentation; microindentation; titanium alloys; selective laser melting (SLM)
Rights: © ASM International 2019
DOI: 10.1007/s13632-019-00581-w
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