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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
The surface roughness of the Ti6Al4V ELI alloy shown by confocal microscopy. (A) The 2D topographic roughness grid sample; (B) The 3D topographic roughness grid sample; (C) The 2D topographic roughness acid-etched sample; (D) The 3D topographic roughness acid-etched sample.