Microstructural Characterization and Mechanical Properties of Mg-Zr-Ca Alloys Prepared by Hot-Extrusion for Biomedical Applications

2011 ◽  
Vol 4 (8) ◽  
pp. 2860-2863 ◽  
Author(s):  
Ying-Long Zhou ◽  
Dong-Mei Luo ◽  
Wang-Yu Hu ◽  
Yuncang Li ◽  
Peter Hodgson ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Biomedical Applications ◽  
Hot Extrusion ◽  
Microstructural Characterization

Development and Characterization of New Ti-25Ta-Zr Alloys for Biomedical Applications

2021 ◽  
Vol 1016 ◽  
pp. 137-144
Author(s):  
Pedro Akira Bazaglia Kuroda ◽  
Fernanda de Freitas Quadros ◽  
Mycaela Vieira Nascimento ◽  
Carlos Roberto Grandini
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Elastic Modulus ◽  
Biomedical Applications ◽  
Solution Heat Treatment ◽  
High Hardness ◽  
Microstructural Characterization ◽  
Β Phase ◽  
Cp Ti ◽  
Microscopy Techniques

This paper deals with the study of the development, structural and microstructural characterization and, selected mechanical properties of Ti-25Ta-50Zr alloy for biomedical applications. The alloy was melted in an arc furnace and various solution heat treatments were performed to analyze the influence of the temperature and time on the structure, microstructure, microhardness and elastic modulus of the samples. The structural and microstructural results, obtained by X-ray diffraction and microscopy techniques, showed that the solution heat treatment performed at high temperatures induces the formation of the β phase, while solution heat treatment performed at low temperatures induces the formation of the α” and ω metastable phases. Regarding the effect of time, samples subjected to heat treatment for 6 hours have only the β phase, indicating that lengthy treatments suppress the α” phase. Regarding the hardness and elastic modulus, the alloy with the α” and ω phases, after treatment performed at a temperature of 500 °C, has a high hardness value and elastic modulus due to the presence of the ω phase that hardens and weakens alloys. The titanium alloys developed in this study have excellent mechanical properties results for use in the orthopedic area, better than many commercial materials such as cp-Ti, stainless steel and Co-Cr alloys.

scholarly journals Enhancing Properties of Aerospace Alloy Elektron 21 Using Boron Carbide Nanoparticles as Reinforcement

2019 ◽  
Vol 9 (24) ◽  
pp. 5470
Author(s):  
Sravya Tekumalla ◽  
Ng Joo Yuan ◽  
Meysam Haghshenas ◽  
Manoj Gupta
Keyword(s):  
Mechanical Properties ◽  
Boron Carbide ◽  
Compressive Loading ◽  
Hot Extrusion ◽  
Microstructural Characterization ◽  
Thermal Insulating ◽  
Damping Characteristics ◽  
B4c Particles ◽  
Superior Mechanical Properties ◽  
Melt Deposition

In this study, the effect of nano-B4C addition on the property profile of Elektron 21 (E21) alloys is investigated. E21 reinforced with different amounts of nano-size B4C particulates was synthesized using the disintegrated melt deposition technique followed by hot extrusion. Microstructural characterization of the developed E21-B4C composites revealed refined grains with the progressive addition of boron carbide nanoparticles. The evaluation of mechanical properties indicated a significant improvement in the yield strength of the nanocomposites under compressive loading. Further, the E21-2.5B4C nanocomposites exhibited the best damping characteristics, highest young’s modulus, and highest resistance to ignition, thus featuring all the characteristics of a material suitable for several aircraft applications besides the currently allowed seat frames. The superior mechanical properties of the E21-B4C nanocomposites are attributed to the refined grain sizes, uniform distribution of the nanoparticles, and the thermal insulating effects of nano-B4C particles.

Mechanical and Microstructural Characterization of the Ti-25Ta-25Nb Alloy for Dental Applications

2016 ◽  
Vol 869 ◽  
pp. 935-939 ◽  
Author(s):  
M.R. Seixas ◽  
C. Bortolini Jr. ◽  
R.T. Konatu ◽  
A. Pereira Jr. ◽  
Ana Paula Rosifini Alves Claro
Keyword(s):  
Mechanical Properties ◽  
Titanium Alloys ◽  
Biomedical Applications ◽  
Cold Work ◽  
Microstructural Characterization ◽  
Nickel Titanium ◽  
Low Elastic Modulus ◽  
Nickel Titanium Alloys ◽  
Dental Applications

Titanium and its alloys have been used in biomedical applications due to their excellent properties such as high corrosion resistance, biocompatibility and mechanical properties. In orthodontics, initially, it was common to use nickel-titanium alloys, however due to allergic reactions of patients, new titanium alloys containing elements such as niobium and tantalum are being studied. The Ti-25Ta-25Nb alloy is a β-titanium alloy and it has a low elastic modulus. In the present work, the ternary alloy was evaluated after cold work by swaging followed by solubilization treatment. Microstructure and mechanical properties were evaluated after each step of the process. Results were similar to find in the literature for this alloy obtained by other processing rote.

Microstructures and Various Properties of Hot-Extruded Mg-Zr-Ca Alloys for Biomedical Applications

2012 ◽  
Vol 232 ◽  
pp. 162-166 ◽  
Author(s):  
Ying Long Zhou ◽  
Dong Mei Luo ◽  
Yun Cang Li ◽  
Cui'e Wen ◽  
Peter D. Hodgson
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Corrosion Behavior ◽  
Biomedical Applications ◽  
Hot Extrusion ◽  
X Ray Diffraction ◽  
Cast Alloys ◽  
Orthopedic Applications ◽  
Potential Use ◽  
Compressive Tests

The microstructures, mechanical properties, corrosion behavior, and biocompatibility of hot-extruded Mg-Zr-Ca alloys have been investigated for potential use in orthopedic applications. The microstructures of the alloys are examined by X-ray diffraction analysis and optical microscopy. The mechanical properties of Mg-Zr-Ca alloys are determined from compressive tests, the corrosion behavior is studied using immersion tests, and biocompatibility is evaluated by cell growth factor using osteoblast-like SaOS2 cell. The experimental results indicate that the hot-extruded alloys have much higher compressive strength than the as-cast alloys and the human bone, and can offer good mechanical properties for orthopedic applications. The hot-extrusion significantly enhances corrosion resistance of the alloys. Among the alloys, the hot-extruded Mg-0.5Zr-1Ca and Mg-1Zr-1Ca alloys possess good combination of mechanical properties, corrosion resistance, and biocompatibility, suggesting that they have a great potential to be good candidates for orthopedic applications.

Enhancing Mechanical Properties of AZ31 Magnesium Alloy Through Simultaneous Addition of Aluminum and Nano-Al2O3

2010 ◽  
Author(s):  
S. Han ◽  
M. E. Alam ◽  
A. M. S. Hamouda ◽  
Q. B. Nguyen ◽  
M. Gupta
Keyword(s):  
Mechanical Properties ◽  
Coefficient Of Thermal Expansion ◽  
Hot Extrusion ◽  
Microstructural Characterization ◽  
Az31 Alloy ◽  
Deposition Technique ◽  
The Matrix ◽  
Characterization Studies ◽  
Melt Deposition ◽  
Work Of Fracture

In the present study, AZ31-Al2O3-Al magnesium nano-composites were successfully synthesized using an innovative disintegrated melt deposition technique followed by hot extrusion. Microstructural characterization studies revealed uniaxial grain size, reasonably uniform distribution of particulates/intermetallics in the matrix and minimal porosity. Physical properties characterization revealed that addition of both nano-Al2O3 and Al reduced the coefficient of thermal expansion (CTE) of monolithic AZ31. The presence of both Al2O3 particulates and aluminum also assisted in improving overall mechanical properties including microhardness, UTS, ductility and work of fracture of AZ31. The results suggest that these composites have significant potential in diverse engineering applications when compared to AZ31 alloy.

An investigation into the effect of ball milling of reinforcement on the enhanced mechanical response of magnesium

2011 ◽  
Vol 45 (24) ◽  
pp. 2483-2493 ◽  
Author(s):  
Meisam Kouhi Habibi ◽  
Khin Sandar Tun ◽  
Manoj Gupta
Keyword(s):  
Mechanical Properties ◽  
Mechanical Response ◽  
Failure Strain ◽  
Hot Extrusion ◽  
Microstructural Characterization ◽  
Microwave Assisted ◽  
The Matrix ◽  
Rapid Sintering ◽  
Powder Metallurgy Route ◽  
Magnesium Composites

Magnesium composites containing as-received and ball-milled (B) Al particles were synthesized through powder metallurgy route using microwave-assisted rapid sintering technique followed by hot extrusion. Microstructural characterization revealed fairly uniform distribution of both as-received and ball-milled (up to 1.626 vol.%) Al particles in the matrix and reduction in average matrix grain size. Compared to monolithic Mg, Mg/Al, and Mg/Al (B) composites exhibited significantly higher strengths and failure strains. The results revealed that strength and failure strain (up to 1.626 vol.% Al) of composites containing ball-milled Al particles remained higher compared to composites containing as-received Al particles. Compared to monolithic Mg, Mg/1.626Al (B) composite exhibited the best mechanical properties improvement with an increase of 78%, 79%, 87%, and 225%, in 0.2%YS, UTS, failure strain and WOF, respectively, while for Mg/1.626Al composite, the improvement was 51%, 53%, 65% and 142%, respectively. The effects of as-received and ball-milled Al particles contribution on the enhancement of mechanical properties of Mg is investigated in this article.

Development and Characterization of Ductile Mg∕Y2O3 Nanocomposites

2007 ◽  
Vol 129 (3) ◽  
pp. 462-467 ◽  
Author(s):  
S. F. Hassan ◽  
M. Gupta
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Hot Extrusion ◽  
Microstructural Characterization ◽  
Powder Metallurgy Technique ◽  
Magnesium Matrix ◽  
Mechanical Properties Characterization ◽  
Reinforcement Distribution ◽  
Work Of Fracture

Nano-Y2O3 particulates containing ductile magnesium nanocomposites were synthesized using blend-press-sinter powder metallurgy technique followed by hot extrusion. Microstructural characterization of the nanocomposite samples showed fairly uniform reinforcement distribution, good reinforcement-matrix interfacial integrity, significant grain refinement of magnesium matrix with increasing presence of reinforcement, and the presence of minimal porosity. Mechanical properties characterization revealed that the presence of nano-Y2O3 reinforcement leads to marginal increases in hardness, 0.2% yield strength and ultimate tensile strength, but a significant increase in ductility and work of fracture of magnesium. The fracture mode was changed from brittle for pure Mg to mix ductile and intergranular in the case of nanocomposites.

Development of Mg-Based Biodegradable Wires for Bone Fixation Devices

2017 ◽  
Author(s):  
Zhigang Xu ◽  
Natalia Guarnizo Mendoza ◽  
Daniel Tilley ◽  
Christopher Plott ◽  
Sergey Yarmolenko ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Rare Earth ◽  
Biomedical Applications ◽  
Hot Extrusion ◽  
Cold Drawing ◽  
Rare Earth Alloys ◽  
Bone Fixation ◽  
Post Annealing ◽  
Fixation Devices ◽  
Re Elements

MgZnCa and MgZnCa-RE (Rare Earth) alloys were developed for biomedical applications. Small wires of the alloys were successfully fabricated from the small rods prepared by hot-extrusion followed by multiple cold-drawing passes with intermittent annealing. It was demonstrated that addition of small amounts of rare earth (RE) elements could effectively enhance the mechanical properties of the wires. The ductility or deformability under twisting test was greatly improved by post annealing at relatively high temperatures.

Development of Al-Mg Based Composites Containing Nanometric Alumina Using the Technique of Disintegrated Melt Deposition

2005 ◽  
Vol 23 ◽  
pp. 159-162 ◽  
Author(s):  
K.F. Ho ◽  
Manoj Gupta
Keyword(s):  
Mechanical Properties ◽  
Elastic Modulus ◽  
Dominant Role ◽  
Hot Extrusion ◽  
Microstructural Characterization ◽  
Magnesium Content ◽  
Characterization Studies ◽  
Mechanical Properties Characterization ◽  
Melt Deposition ◽  
Composite Samples

In this study, composites based on Al-Mg/Al2O3 formulation were fabricated using an innovative solidification route followed by hot extrusion. The studies clearly indicate an increase in retention of nanometric alumina with an increase in magnesium content. Microstructural characterization studies of the extruded composite samples displayed fairly uniform distribution of reinforcement phases and minimal porosity. Results of mechanical properties characterization showed that a cumulative increase in magnesium and nanometric alumina content led to an increase in elastic modulus, 0.2% YS and UTS while the ductility of the composite was adversely affected. A comparison between monolithic Al-3.8Mg and Al-3.4Mg/1.4Al2O3 revealed that the presence of nanometric alumina play a dominant role in realizing a significant increase in elastic modulus, 0.2%YS and UTS of the composites.

Influence of Hot-Extrusion on Mechanical Properties of AZ31B Magnesium Alloy Sheet

2005 ◽  
Vol 15 (1) ◽  
pp. 25-30
Author(s):  
Yong-Gil Kim ◽  
Hak-Kyu Choi ◽  
Min-Cheol Kang ◽  
Hae-Yong Jeong ◽  
Cha-Hurn Bae
Keyword(s):  
Mechanical Properties ◽  
Magnesium Alloy ◽  
Hot Extrusion ◽  
Alloy Sheet ◽  
Az31b Magnesium Alloy ◽  
Magnesium Alloy Sheet ◽  
Az31b Magnesium Alloy Sheet
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