Mechanical Properties-Graded Ti Alloy Implants for Orthopedic Applications

2009 ◽  
Vol 631-632 ◽  
pp. 205-210 ◽  
Author(s):  
Taek Kyun Jung ◽  
Hiroaki Matsumoto ◽  
Tadasu Abumiya ◽  
Naoya Masahashi ◽  
Mok Soon Kim ◽  
...  
Keyword(s):  
Young’S Modulus ◽  
Distal Part ◽  
Young's Modulus ◽  
High Strength ◽  
Ti Alloy ◽  
Heated Zone ◽  
Artificial Hip Joint ◽  
Artificial Hip ◽  
Orthopedic Applications ◽  
Start Temperature

. Low Young’s modulus is attained by controlling phase stability of  (bcc) Ti-Nb-Sn alloys consisting of non-cytotoxic elements, based on experimental results that Young’s modulus decreases with decreasing temperature toward ” (orthorhombic) martensitic transformation start temperature (Ms). Cold groove rolled, metastable  (Ti-35%Nb)-4%Sn alloy exhibits low Young’s modulus of about 40 GPa at 297 K, measured by the free resonance vibration method. This value is much lower than that of Ti-6%Al-4%V and close to that of human cortical bone. By heating one edge of the groove rolled rod to 573 K for 4 h, hardness and Young’s modulus are found to increase significantly at the heated zone and to change depending on distance from the heated zone. The increase in hardness is explained mainly by fine  precipitation and additionally by microstructure refinement through reverse transformation ”→ of deformation-induced martensite. From these results, an advanced stem having high strength at the necked part can be developed for a new artificial hip joint, keeping low Young’s modulus at the distal part implanted in a femur.

Biomechanical evaluation of artificial hip joint stem with Young's modulus gradation

2021 ◽  
Vol 2021.74 (0) ◽  
pp. C52
Author(s):  
Ryosuke NAKAI ◽  
Kiyohide OCHIAI ◽  
Motoki WASA ◽  
Shuji HANADA ◽  
Etsuo CHOSA ◽  
...  
Keyword(s):  
Young’S Modulus ◽  
Hip Joint ◽  
Young's Modulus ◽  
Artificial Hip Joint ◽  
Artificial Hip ◽  
Biomechanical Evaluation

Achieving high strength and low Young’s modulus in martensitic Ti-Nb-O alloys

2021 ◽  
pp. 130308
Author(s):  
E.S.N. Lopes ◽  
L.U. dos Santos ◽  
R. Caram ◽  
K.N. Campo
Keyword(s):  
Young’S Modulus ◽  
Young's Modulus ◽  
High Strength

The Tensile Behavior of High-Strength Carbon Fibers

2016 ◽  
Vol 22 (4) ◽  
pp. 841-844 ◽  
Author(s):  
Tye Langston
Keyword(s):  
Young’S Modulus ◽  
Carbon Fibers ◽  
Young's Modulus ◽  
Weak Link ◽  
Fiber Strength ◽  
Fiber Surface ◽  
High Strength ◽  
Carbon Filament ◽  
Specific Strength ◽  
Macro Scale

AbstractCarbon fibers exhibit exceptional properties such as high stiffness and specific strength, making them excellent reinforcements for composite materials. However, it is difficult to directly measure their tensile properties and estimates are often obtained by tensioning fiber bundles or composites. While these macro scale tests are informative for composite design, their results differ from that of direct testing of individual fibers. Furthermore, carbon filament strength also depends on other variables, including the test length, actual fiber diameter, and material flaw distribution. Single fiber tensile testing was performed on high-strength carbon fibers to determine the load and strain at failure. Scanning electron microscopy was also conducted to evaluate the fiber surface morphology and precisely measure each fiber’s diameter. Fiber strength was found to depend on the test gage length and in an effort to better understand the overall expected performance of these fibers at various lengths, statistical weak link scaling was performed. In addition, the true Young’s modulus was also determined by taking the system compliance into account. It was found that all properties (tensile strength, strain to failure, and Young’s modulus) matched very well with the manufacturers’ reported values at 20 mm gage lengths, but deviated significantly at other lengths.

High‐entropy eutectic composites with high strength and low Young's modulus

2020 ◽  
Author(s):  
Tapabrata Maity ◽  
Konda Gokuldoss Prashanth ◽  
Özge Balcı ◽  
Grzegorz Cieślak ◽  
Maciej Spychalski ◽  
...  
Keyword(s):  
Young’S Modulus ◽  
Young's Modulus ◽  
High Strength ◽  
High Entropy

scholarly journals Kinetics of Capability Aging in Ti-13Nb-13Zr Alloy

Crystals ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 693 ◽  
Author(s):  
Myoungjae Lee ◽  
In-Su Kim ◽  
Young Hoon Moon ◽  
Hyun Sik Yoon ◽  
Chan Hee Park ◽  
...  
Keyword(s):  
Mechanical Strength ◽  
Young’S Modulus ◽  
Mechanical Performance ◽  
Young's Modulus ◽  
Solution Treatment ◽  
High Strength ◽  
Biomedical Implant ◽  
13Zr Alloy ◽  
American Society ◽  
Kinetics Of

Metals for biomedical implant applications require a simultaneous achievement of high strength and low Young’s modulus from the viewpoints of mechanical properties. The American Society for Testing and Materials (ASTM) standards suggest two types of processing methods to confer such a mechanical performance to Ti-13Nb-13Zr alloy: solution treatment (ST) and capability aging (CA). This study elucidated the kinetics of CA process in Ti-13Nb-13Zr alloy. Microstructural evolution and mechanical change were investigated depending on the CA duration from 10 min to 6 h. The initial ST alloy possessed the full α′-martensitic structure, leading to a low strength, low Young’s modulus, and high ductility. Increasing CA duration increased mechanical strength and Young’s modulus in exchange for the reduction of ductility. Such a tendency is attributed to the decomposition of α′ martensite into (α+β) structure, particularly hard α precipitates. Mechanical compatibility (i.e., Young’s modulus compensated with a mechanical strength) of Ti-13Nb-13Zr alloy rarely increased by changing CA duration, suggestive of the intrinsic limit of static heat treatment.

Mathematical Analysis of MWCNT Based Aluminum Alloy Metal Matrix Composite

2016 ◽  
Vol 852 ◽  
pp. 98-103
Author(s):  
P.S. Samuel Ratna Kumar ◽  
S. John Alexis ◽  
D.S. Robinson Smart
Keyword(s):  
Aluminium Alloy ◽  
Metal Matrix Composite ◽  
Young’S Modulus ◽  
Matrix Composite ◽  
Metal Matrix ◽  
Young's Modulus ◽  
High Strength ◽  
Multiwall Carbon Nanotube ◽  
Aspect Ratios ◽  
Marine Applications

The interest in Multiwall Carbon Nanotube (MWCNT) as reinforcement for Aluminium alloy has been growing considerably because of its significant properties such as high Strength, elastic modulus, flexibility and high aspect ratios which makes the combination for being used in aerospace, automobile and marine applications. This work mainly focuses on the theoretical analysis of Strength and Young’s modulus of MWCNT addition with Aluminium 5083 metal matrix composite for different compositions like 1, 1.25, 1.5 and 1.75 weight %, representing that the MWCNT are effective reinforcement. The predicted value shows that, the addition of MWCNT is increasing the Young’s modulus and Strength for the composite compared to the AA5083 (Aluminium alloy).

Formation of Alumina Layer on Ti Alloy for Artificial Hip Joint

2014 ◽  
Vol 614 ◽  
pp. 200-205 ◽  
Author(s):  
Rohit Khanna ◽  
Tomiharu Matsushita ◽  
Tadashi Kokubo ◽  
Hiroaki Takadama
Keyword(s):  
Heat Treatment ◽  
Hip Joint ◽  
Thick Layer ◽  
Cold Spraying ◽  
Ti Alloy ◽  
Good Adhesion ◽  
Time Duration ◽  
Alumina Layer ◽  
Artificial Hip Joint ◽  
Artificial Hip

The purpose of this research is to form a layer of alumina on Ti-6Al-4V alloy for hip joint by deposition of Al layer on the Ti alloy and its subsequent oxidation. In this work, a thick layer of Al was deposited onto the Ti alloy by cold spraying. The reaction layer of Al3Ti was formed by heat treatment of cold sprayed Al at 640°C in air/Ar atmosphere to ensure a good adhesion between cold sprayed Al layer and the Ti alloy. A thick Al3Ti layer formed by heat treatment of Al layer at 640°C for 12 h in air, was subjected to heat treatment at 850°C for 96 h in air to form a-alumina and Al2Ti. Thus, alumina scales can be formed on the top surface of the Ti alloy and can be densified by increasing the time duration of heat treatment.

Fibers of Bamboo and Hem Palm Tree

2001 ◽  
Vol 702 ◽  
Author(s):  
Shigeyasu Amada
Keyword(s):  
Young’S Modulus ◽  
Elastic Properties ◽  
Volume Fraction ◽  
Young's Modulus ◽  
Simple Procedure ◽  
High Strength ◽  
Tensile Tests ◽  
Palm Tree ◽  
Bamboo Fibers ◽  
The One

ABSTRACTBamboo is a typical composite material which is axially reinforced by very strong fibers. So that, the fibers play an important role for the bamboo structure. The elastic properties of the bamboo culm have been measured only by tensile test so far, which needs a large specimen. Recently ultra-sonic technique, which has a simple procedure and uses a small specimen, has been applied to woods as well as metals. This report reviews about the elastic properties of bamboo and Hemp palm fibers. The Young's modulus and Poisson's ratio of the bamboo fibers are measured by ultra-sonic method with a transmitting wave. On the other hand, the strength of the bamboo and Hemp palm fibers are measured by the tensile tests. Using the volume fraction of fibers in the specimen and mixture principle, the Young's modulus and strength of the fibers and parenchyma were obtained. The fiber has a high strength up to 1GPa and an strong anisotropic property because its axial Young's modulus has 7 times higher than the one in the transverse direction.

Development of Biomedical Near β Titanium Alloys

2009 ◽  
Vol 618-619 ◽  
pp. 303-306 ◽  
Author(s):  
Zhen Tao Yu ◽  
Gui Wang ◽  
Xi Qun Ma ◽  
Matthew S. Dargusch ◽  
Jian Ye Han ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Titanium Alloys ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Solution Treatment ◽  
High Strength ◽  
Alloy Chemistry ◽  
Solution Treated ◽  
Strength And Plasticity ◽  
Hot Rolled

The effects of alloy chemistry and heat treatment on the microstructure and mechanical properties of Ti-Nb-Zr-Mo-Sn near  type titanium alloys have been investigated. Near β titanium alloys consisting of non-toxic alloying elements Mo, Nb, Zr, Sn possess a low Young’s modulus, and moderate strength and plasticity. As the hot rolled TLM alloy (Ti-25Nb-3Zr-3Mo-2Sn) possesses high strength and low Young’s modulus a detailed investigation is performed for this alloy. Solution treatment of the hot rolled TLM alloy reduces strength and increases ductility without affecting the Young’s modulus. Ageing of the solution treated TLM alloy reduces elongation and increases the Young’s modulus with little change in strength. Both solution treated and aged conditions show features of two stage yielding associated with a strain induced martensitic transformation.

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