Fabrication of biomedical Ti-24Nb-4Zr-8Sn alloy with high strength and low elastic modulus by powder metallurgy

2019 ◽  
Vol 772 ◽  
pp. 968-977 ◽  
Author(s):  
Xia Li ◽  
Shulong Ye ◽  
Xini Yuan ◽  
Peng Yu
Keyword(s):  
Elastic Modulus ◽  
Powder Metallurgy ◽  
High Strength ◽  
Low Elastic Modulus

Zr–Si biomaterials with high strength and low elastic modulus

2011 ◽  
Vol 32 (8-9) ◽  
pp. 4598-4602 ◽  
Author(s):  
Chunliu Li ◽  
Yongzhong Zhan ◽  
Wenping Jiang
Keyword(s):  
Elastic Modulus ◽  
High Strength ◽  
Low Elastic Modulus

Effect of HA Content on Microstructure and Compression Properties of Ti-Nb-Sn/HA Composites Fabricated by Plasma Current Activated Sintering

2015 ◽  
Vol 816 ◽  
pp. 705-710
Author(s):  
Xiao Peng Wang ◽  
Yu Yong Chen ◽  
Fan Tao Kong ◽  
Shu Long Xiao
Keyword(s):  
Grain Size ◽  
Elastic Modulus ◽  
Compression Test ◽  
Compression Strength ◽  
High Strength ◽  
Plasma Current ◽  
Activated Sintering ◽  
Compression Properties ◽  
Low Elastic Modulus ◽  
Sintering Properties

Novel bio-composites were synthesized by plasma current activated sintering from the Ti-35Nb-2.5Sn/HA powders ball-milled for 12 h. The aim of this study was to investigate the effects of HA content (5, 10 and 15 wt%) on sintering properties, microstructure and compression properties of Ti-35Nb-2.5Sn/HA bio-composites. Results indicated that sintering rate decreased slightly with the increase of HA content. The phases of sintered composites were mainly˰ڂ˽̤̹˼˰̘̑˼˰Ca3(PO4)2(TCP), TiO2, CaTiO3and TixPy. The grain size of sintered composites reduced with the increasing of HA content, and sintered composites with ultra fine grains were fabricated finally. The compression test showed that all the sintered composites had low elastic modulus and high compression strength. The elastic modulus of Ti-35Nb-2.5Sn/15HA sintered composites was 22GPa with a high strength of 877MPa.

Characterization of Ti-27Nb-13Zr Alloy Produced by Powder Metallurgy

2012 ◽  
Vol 77 ◽  
pp. 178-183
Author(s):  
Marcio W.D. Mendes ◽  
Ana Helena Almeida Bressiani ◽  
José Carlos Bressiani
Keyword(s):  
Elastic Modulus ◽  
Powder Metallurgy ◽  
Vickers Hardness ◽  
High Vacuum ◽  
High Strength ◽  
Hardness Test ◽  
High Energy ◽  
Vacuum Furnace ◽  
Mean Values ◽  
13Zr Alloy

Titanium alloy are widely used in biomedical applications due to their excellent properties such as high strength, good corrosion resistance and excellent biocompatibility. Researches are being developed with elements such as Nb and Zr that reach all criterions for excellent biocompatibility and provide titanium alloys with Young’s modulus close to human bone. The aim of this work was to produce Ti-27Nb-13Zr alloy with different milling times by powder metallurgy process. The mixtures were performed by high energy milling and sintering in high vacuum furnace with temperature of 1300 °C / 3 h. The microstructures of samples were analyzed by SEM and XRD, while the mechanical behavior was evaluated by elastic modulus and Vickers hardness test. The diffraction results of sintering treatment indicate that the alloys are composed of α and β phases. Images obtained by SEM indicate the formation of equiaxial structures. Vickers hardness measurements from sintered samples with 1300 °C / 3 h indicate mean values around 413, 473 and 609 HV for 2, 6 and 10 hours of milling, respectively. The values of elastic modulus enable use the alloy as biomaterial.

Preparation and Characterisation of New Titanium Based Alloys for Orthopaedic and Dental Applications

2006 ◽  
Vol 15-17 ◽  
pp. 71-76 ◽  
Author(s):  
A. Nouri ◽  
X.B. Chen ◽  
Peter D. Hodgson ◽  
Cui E Wen
Keyword(s):  
Elastic Modulus ◽  
Titanium Alloys ◽  
High Strength ◽  
Porous Titanium ◽  
Vacuum Furnace ◽  
Powder Metallurgy Method ◽  
Porous Metals ◽  
X Ray Diffraction ◽  
Low Elastic Modulus ◽  
Dental Applications

Various types of titanium alloys with high strength and low elastic modulus and, at the same time, vanadium and aluminium free have been developed as surgical biomaterials in recent years. Moreover, porous metals are promising hard tissue implants in orthopaedic and dentistry, where they mimic the porous structure and the low elastic modulus of natural bone. In the present study, new biocompatible Ti-based alloy foams with approximate relative densities of 0.4, in which Sn and Nb were added as alloying metals, were synthesised through powder metallurgy method. The new alloys were prepared by mechanical alloying and subsequently sintered at high temperature using a vacuum furnace. The characteristics and the processability of the ball milled powders and the new porous titanium-based alloys were characterised by X-ray diffraction, optical microscopy and scanning electron microscopy .The mechanical properties of the new titanium alloys were examined by Vickers microhardness measurements and compression testing.

A Newly Developed Biocompatible Titanium Alloy and its Scaffolding by Powder Metallurgy

2012 ◽  
Vol 520 ◽  
pp. 201-207 ◽  
Author(s):  
Cui'e Wen ◽  
Yun Cang Li
Keyword(s):  
Elastic Modulus ◽  
Powder Metallurgy ◽  
Bone Cell ◽  
Ti Alloy ◽  
Biological Fixation ◽  
In Vitro Biocompatibility ◽  
Porous Ti ◽  
Low Elastic Modulus

Titanium and some of its alloys have received considerable attention for biomedical applications in recent years due to their excellent biocompatibility, high corrosion resistance and relatively low elastic modulus when compared to other metallic implant materials such as Co-Cr alloys and stainless steels. However, these alloys can still suffer from inadequate biocompatibility; lack of biological fixation and biomechanical mismatch with the properties of bone in vivo. In this study, a new biocompatible Ti alloy, Ti4Ta4Sn, consisting of alpha and beta phases was fabricated and their mechanical properties were investigated. Moreover, the Ti alloy was scaffolded into a porous structure using powder metallurgy with an architecture and elastic modulus mimicking those of cancellous bone. Cell culture results indicated that the new porous Ti alloy scaffold possesses excellent in vitro biocompatibility.

scholarly journals Beta Ti-45Nb and Ti-50Nb Alloys Produced by Powder Metallurgy for Aerospace Application

2010 ◽  
Vol 660-661 ◽  
pp. 405-409 ◽  
Author(s):  
G.V. Martins ◽  
Cosme Roberto Moreira Silva ◽  
C.A. Nunes ◽  
Vladimir J. Trava-Airoldi ◽  
L.A. Borges ◽  
...  
Keyword(s):  
Elastic Modulus ◽  
Powder Metallurgy ◽  
Titanium Alloys ◽  
Substantial Reduction ◽  
Weight Ratio ◽  
High Strength ◽  
Beta Phase ◽  
Cold Isostatic Pressing ◽  
Specific Mass ◽  
Beta Titanium

Beta titanium alloys parts are used on advanced aerospace systems because of their high strength to weight ratio and excellent corrosion resistance. Production of powder metallurgy titanium alloys components may lead to a substantial reduction in the cost, compared to those produced by conventional cast and wrought processes, because additional working operations and material waste can be avoided. In this work, beta Ti-45Nb and Ti-50Nb were produced by the blended elemental technique, followed by uniaxial and cold isostatic pressing with subsequent densification by sintering. Sintered samples were characterized for phase composition by XRD, microstructure by SEM, hardness by Vickers indentation, specific mass by the Archimedes method and elastic modulus by resonance ultrasound. The sintered samples presented only the beta phase, higher hardness and lower elastic modulus when compared to Ti6Al4V alloy and experimental specific mass value near theoretical specific mass. These characteristics are adequate for application on several aerospace parts.

The Mechanical Properties of a New Titanium Alloys with Low Modulus

2007 ◽  
Vol 351 ◽  
pp. 243-247 ◽  
Author(s):  
Hong Hua Wang ◽  
Chen Rong ◽  
Di Zhang
Keyword(s):  
Mechanical Properties ◽  
Fatigue Crack ◽  
Elastic Modulus ◽  
Cold Working ◽  
High Strength ◽  
Deformation Energy ◽  
Α Phase ◽  
Low Elastic Modulus ◽  
High Elasticity ◽  
Low Modulus

We developed a new titanium alloy with high strength, low elastic modulus, high elasticity and plasticity after cold working. Thermo mechanical processing, ageing, recrystallization after cold working was conducted to change the mechanical properties. The release of the elastic deformation energy after cold working is help to get the low modulus, however, the precipitation of α phase hamper the formation and propagation of the fatigue crack. Recrystallization after cold working could refine the grain size from 100μm to 1～5μm. Cold working after recrystallization absolutely restricts the propagation of the fatigue crack. As a result, the fatigue strength was increased, and the same time, it keeps the low elastic modulus.

Phase Transformation of Biomedical Metastable β Titanium Alloy during Aging

2009 ◽  
Vol 610-613 ◽  
pp. 1168-1173
Author(s):  
Ai Hong Guo ◽  
Wen Fang Cui ◽  
Yi Zhou Wu ◽  
Xiang Hong Liu ◽  
Lian Zhou
Keyword(s):  
Phase Transformation ◽  
Elastic Modulus ◽  
Biomedical Application ◽  
High Strength ◽  
Tensile Tests ◽  
High Plasticity ◽  
Aging Condition ◽  
Β Phase ◽  
Low Elastic Modulus ◽  
Strength And Plasticity

A kind of metastable β type Ti-30Nb-13Zr-0.5Fe (wt.%) alloy for biomedical application was newly designed and developed. In order to exam the phase transformation during aging and its effects on the mechanical properties, the alloy was β solubilized and aged at 350°C-550°C for 4 hours. The microstructures were observed by OM and TEM, and the phase structures were identified by XRD. The tensile tests were performed with various aged microstructures. The results show that a lot of ω phase precipitates during aging at 350°C, leading to the increase of strength and elastic modulus and drastic decrease of plasticity. Aging at 450°C, dot α phase uniformly precipitates from metastable β phase. The good combination of high strength 、high plasticity and low elastic modulus was obtained under this aging condition. With increasing aging temperature and aging time α precipitations coarsen and precipitation free zones (PFZ) along prior β grain boundaries form, which are the main reasons to lower the strength and plasticity.

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