An Ebsd Investigation of Ultrafine-grain Titanium for Biomedical Applications (postprint)
نویسنده
چکیده
High-resolution electron backscatter diffraction (EBSD) was used to examine the grain structure in long rods of ultrafine-grain (UFG) commercial-purity titanium produced for medical implants. The UFG material was obtained by equal channel angular pressing (ECAP) using a Conform scheme followed by rod drawing. The microstructure was found to be bimodal consisting of relatively coarse elongated grains containing well-developed substructure and ultrafine grains. The mean grain size was 0.3 μm, and the fraction of high-angle boundaries was 45%. The material had a strong 1010 < ̄ >-fiber texture. An analysis of the microstructure–properties relationship showed that the increase in material strength developed during severe plastic deformation resulted from grain refinement and substructure evolution in comparable measure. & 2015 Elsevier B.V. All rights reserved.
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