Abstract: Titanium and titanium alloys are attractive biomedical materials due to their lower young’s modulus, good mechanical properties such as sufficient strength and biological compatibilities. In this experimental study near beta Ti13Nb13Zr (TNZ) was processed with Equal Angular Channel Pressing (ECAP) and Hydrostatic (HE) extrusion in order to obtain ultrafine grained biomaterials. With these two techniques efficiency were compared for TNZ with its mechanical and microstructural properties. After ECAP of TNZ the grains were observed to be more granular than HE processed Ti13Nb13Zr due to the rotations in the subsequent passes. For the ECAP procedure final grain size was measured as 410 nm. HE applied TNZ specimen had a lamellar structure with 80 nm thickness. For ECAPed TNZ the maximum tensile strength increased only 60 MPA which equals 1.1 times of initial state. HE applied ultrafine grained TNZ maximum mechanical strength was nearly 1.41 times higher than initial state.
Authors: Aslı G. Bulutsuz, Kadir Ozaltin, Witold Chrominski,Mehmet Emin Yurci, and Malgorzata Lewandowska
Keywords: Severe Plastic Deformation, Hydrostatic Extrusion, Beta Titanium