An EBSD investigation of ultrafine-grain titanium for biomedical applications

D’yakonov, G. S.; Zemtsova, E. G.; Mironov, S.; Semenova, Irina P.; Valiev, Ruslan Z.; Semiatin, S. L.

doi:10.1016/j.msea.2015.09.080

Cited by 53 publications

(17 citation statements)

References 17 publications

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“…The Ti grain structures imparted by C-ECAP are comparable to those found by others in UG-Ti [19][20][21]. Likewise, the enhanced cell attachment and proliferation are consistent with prior cell proliferation studies [7,8].…”

Section: Discussionsupporting

confidence: 88%

Effect of surface grain boundary density on preosteoblast proliferation on titanium

Lowe

Reiss

Illescas

et al. 2020

Materials Research Letters

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Studies since 2004 have shown that the cytocompatibility of ultrafine grain (UG) commercial purity (CP) titanium exceeds that of coarse grain (CG) CP titanium (Ti) by 30% to 20-fold. To isolate the factors affecting this large reported variability of CP titanium's cytocompatibility, discs of UG and CG titanium were fabricated with controlled texture and roughness. The discs were seeded with MC3T3-E1 pre-osteoblastic cells and cultured for 72 h. The proliferation of cells on polished UG-Ti exceeded unpolished CG-Ti 3.04-fold. Cell proliferation was found to correlate with a new biophysical parameter, the average grain boundary length per surface-attached cell. IMPACT STATEMENT By eliminating the influences of texture and roughness we have isolated the positive correlation between MC3TE-E1 cell proliferation on titanium and grain boundary length per surface-attached cell.

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Section: Discussionsupporting

confidence: 88%

Effect of surface grain boundary density on preosteoblast proliferation on titanium

Lowe

Reiss

Illescas

et al. 2020

Materials Research Letters

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“…It should be marked that after ECAP-C, most of the grains have an equiaxial shape. This state was previously examined [28] using the electron backscatter diffraction method. Spots with azimuthal blurring were observed on the concentric circles in the diffraction patterns, which testify to the mostly granular structure of the deformation origin ( Figure 1b).…”

Section: Methodsmentioning

confidence: 99%

Impact Toughness of Ultrafine‐Grained Commercially Pure Titanium for Medical Application

et al. 2018

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This study aims at achieving the best combination of strength, ductility, and impact toughness in ultrafine-grained (UFG) Ti Grade 4 produced by equalchannel angular pressing via Conform scheme (ECAP-C) with subsequent cold drawing. UFG structures with various parameters (e.g., size and shape of grains, dislocation density, conditions of boundaries) are formed by varying the treatment procedures (deformation temperature and speed at drawing, annealing temperature). The tensile and impact toughness tests were performed on samples with a V-shaped notch and different structures of commercially pure Ti Grade 4 in the coarse-grained and UFG states. The results demonstrated that grain refinement, higher dislocation density, and their elongated shape were obtained as a result of drawing at 200 С, which led to a decrease in both the uniform elongation at tension and the impact toughness of Ti Grade 4. Short-term annealing at 400-450 C could improve the impact toughness of UFG Ti with a non-significant decrease in strength. This short-term annealing contributes to the dislocation density decrease without considerable grain growth as a result of the recovery and redistribution of dislocations. The dependence of impact toughness on the strain hardening ability of UFG Ti was discussed.

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“…where The M is the Taylor factor (it is 2.6 in the present work), α is a constant (typically equal it is equal to taken to be 0.15) [26], G is denotes the shear modulus of titanium (equal to 40 GPa) [26], b is the Burgers vector, The dislocation density, ρ is calculated as follows:…”

Section: ( )mentioning

confidence: 99%

Influence of cold rolling deformation on mechanical properties and corrosion behavior of Ti-6Al-3Nb-2Zr-1Mo alloy

Guo

Wang

Meng

et al. 2020

Mater. Res. Express

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The effects of cold deformation on tensile properties and corrosion behavior of the Ti-6Al-3Nb-2Zr-1Mo alloy are investigated in the present work. The microstructure of the sample was characterized by means of x-ray diffractometry, scanning electron microscope and electron backscattered diffraction. The corrosion behavior of the alloy in HCl solution was characterized by potentiodynamic polarization test. The results show that the α laths became kinked after cold rolling and the interlamellar spacing decreased to about 0.45 μm at the rolling reduction of 50%. The kinking process closely linked with the development of shear bands within the colonies. EBSD investigations indicated that the α lath exhibited a (0001) texture in the 50% cold-rolled alloy. With the increase of cold deformation strain, the Yield strength of the alloy increases from 811 MPa to 943 MPa. The corrosion resistance of processed samples was higher than as-received sample. Experimental results showed that deformation substructure and texture had an influence on the corrosion rate of this alloy.

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An EBSD investigation of ultrafine-grain titanium for biomedical applications

Cited by 53 publications

References 17 publications

Effect of surface grain boundary density on preosteoblast proliferation on titanium

Effect of surface grain boundary density on preosteoblast proliferation on titanium

Impact Toughness of Ultrafine‐Grained Commercially Pure Titanium for Medical Application

Influence of cold rolling deformation on mechanical properties and corrosion behavior of Ti-6Al-3Nb-2Zr-1Mo alloy

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