Visn. Nac. Akad. Nauk Ukr. 2019. (4):42-49

N.I. Khripta
Kurdyumov Institute for Metal Physics of the National Academy of Sciences of Ukraine, Kyiv

According to the materials of scientific report at the meeting of the Presidium of NAS of Ukraine, February 27, 2019

The required properties of metallic biomaterials are analyzed in view of their biochemical/biomechanical compatibility, high X-ray contrast, and reduced magnetic susceptibility. As established, the purposeful alloying and/or thermomechanical treatment result in acceptable biocompatibility characteristics of metallic materials such as high corrosion resistance in biological fluids, reduced elastic modulus, increased degree of reversible deformation and fatigue life. The method of ultrasonic impact treatment (UIT) is developed for the nanostructuring and mechanochemical oxidation of the surface layers of metallic alloys by surface severe plastic deformation. The efficiency of the method is illustrated by experimental results indicating on the increased corrosion resistance, reversible deformation, and fatigue resistance at cyclic loads of the Zr1Nb, Ti6Al4V, ZrTiNb, and TiZrNbTa alloys. The advantages of the developed UIT process in the sense of solving the problem of biomechanical compatibility of metallic materials and producing the orthopedic constructions and implants are shown.
Keywords: zirconium/titanium alloys, structure, ultrasonic impact treatment, ultrafine/nano grains, deformation, oxidation, corrosion resistance.

Language of article: ukrainian



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