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Effect of surface etching on the tensile behavior of coarse- and ultrafine-grained pure titanium

Title
Effect of surface etching on the tensile behavior of coarse- and ultrafine-grained pure titanium
Authors
Baek, Seung MiPolyakov, Alexander V.Moon, Ji HyunSemenova, Irina P.Valiev, Ruslan Z.Kim, Hyoung Seop
POSTECH Authors
Kim, Hyoung Seop
Date Issued
Nov-2017
Publisher
ELSEVIER SCIENCE SA
Abstract
For metallic biomaterials, surface treatment is essential for improving osseointegration. Acid etching is the basic method used for removing undesirable contaminants and increasing surface roughness. Although the obvious effect of the etching process is a change in surface characteristics, interestingly, surface etching can also affect the tensile properties of the material. In this paper, the influence of etching on the tensile behavior of pure titanium was investigated, The surface morphology and tensile properties of coarse- and ultrafine-grained pure titanium specimens were examined after hydrofluoric acid etching, in terms of the etching time. The ultrafinegrained titanium was prepared using conform equal-channel angular pressing to enhance the mechanical properties of the pure titanium. Micro-scale pores were observed, and tensile strength was decreased in the 1 min etched coarse-grained titanium. The 20 min etched coarse-grained specimen and the ultrafine-grained specimen with relatively homogeneous pore structure maintained or slightly increased their tensile strengths. These results provide a new foundation for the production of reliable metallic biomaterials.
Keywords
HIGH-PRESSURE TORSION; BIOMEDICAL APPLICATIONS; MECHANICAL-PROPERTIES; NANOSTRUCTURED TITANIUM; ROUGHNESS; ALLOYS; TI; MICROSTRUCTURE; TI-6AL-4V; ALUMINUM
URI
http://oasis.postech.ac.kr/handle/2014.oak/50424
DOI
10.1016/j.msea.2017.09.065
ISSN
0921-5093
Article Type
Article
Citation
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, vol. 707, page. 337 - 343, 2017-11
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 KIM, HYOUNG SEOP
Dept of Materials Science & Enginrg
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