scholarly journals REVIEW OF MATERIALS AND TECHNOLOGICAL METHODS USED IN THE MANUFACTURE OF ENDOPROSTHESIS IN TRAUMATOLOGY AND ORTHOPAEDICS

2017 ◽  
Vol 2 (3) ◽  
pp. 13-17
Author(s):  
AV V Kolsanov ◽  
AN N Nikolaenko ◽  
VV V Ivanov ◽  
SA A Prichodko ◽  
PV V Platonov
Keyword(s):  
Corrosion Resistance ◽  
Musculoskeletal System ◽  
Surface Finish ◽  
High Corrosion Resistance ◽  
Specific Strength ◽  
The Third ◽  
High Specific Strength ◽  
Different Types ◽  
Low Modulus ◽  
Technological Methods

Traumas and diseases of the musculoskeletal system are the second among the causes of temporary disability of the population, and the third among the causes of disability and mortality. An effective method of treatment is endoprosthetics. ; Every year across the globe 500-1000 patients per 1 million of population require prosthetics. The development of endoprostheses is progressing in various spheres: design of the implant parts, methods of fixation, use of various materials, different types of surface finish of implants. Endoprostheses that are currently produced and used in traumatology and orthopaedics are unified, i.e. ; standardized - all of them have different size, but their shape is the same. This imposes serious limitations on the use of implantation in difficult clinical cases. The way out can be the use of personified implants, designed and manufactured with the use of modern rapid prototyping technologies. In this case, the use of titanium will fully implement the most important advantages of this direction: the best biocompatibility, high corrosion resistance, low modulus of elasticity, high specific strength and endurance.

Estimate Biocompatibility and Injection-Molding Processability of Ti-Based Metallic Glasses for Dental Implant

2008 ◽  
Vol 57 ◽  
pp. 216-219
Author(s):  
Jeong Jung Oak ◽  
Hisamichi Kimura ◽  
Akihisa Inoue
Keyword(s):  
Corrosion Resistance ◽  
Metallic Glass ◽  
Metallic Glasses ◽  
High Corrosion Resistance ◽  
Specific Strength ◽  
Glass Forming ◽  
High Specific Strength ◽  
Medical Reports ◽  
Superior Corrosion Resistance

Recently, Ti-based metallic glasses aim at biomaterials with their high specific strength and superior corrosion resistance. Their high workability also shows a good performance for mass production under the energy saving environment. In this study, we started investigation of the design of Ti-based metallic glasses with the restricted alloying elements for biocompatibility and characteristic evaluation of the optimized Ti-based metallic glasses with higher glass forming ability for dental implants. These Ti-based metallic glasses do not contain Al, V and Ni elements which are well known to be neurotoxicity and cytotoxicity for human body. Current medical reports of impracticability by these elements have been a hot issue in biomaterials science. Newly designed Ti-based metallic glasses exhibit good performances. Especially, the optimized Ti-based metallic glass has high corrosion resistance with better passivity in a wide passivation range in simulated body fluids at 310K. In addition, biocompatibility of Ti-based metallic glass was also evaluated by cell culture in vitro. Excellent biocompatibility of Ti-based metallic glass show high potentials to be applied as biomaterials that necrosis of osteoblast (SaOS2) was not detected in this study.

Metallic Coatings for Brazing Aluminum Alloys

2019 ◽  
Author(s):  
A.A. Suslov
Keyword(s):  
Corrosion Resistance ◽  
Aluminum Alloys ◽  
Oxide Film ◽  
Structural Materials ◽  
Contact Melting ◽  
Parent Material ◽  
Metallic Coatings ◽  
Specific Strength ◽  
High Specific Strength ◽  
Modern Engineering

Because of their high specific strength and satisfactory corrosion resistance, aluminum alloys belong to the group of fundamental structural materials in modern engineering. Their wide use has been made possible as a result of developing advanced methods of processing and producing permanent joints by welding or brazing. However, the application of brazing aluminum alloys is limited because of the problems in removing the strong and chemically resistant oxide film. These problems can be overcome by using metallic coatings which themselves do not oxidize during heating in vacuum and, when deposited, the oxide film is broken up and can be removed from the surface of the parent material. The most promising method is to use metallic coatings in the form of individual components of the brazing alloy which forms in contact melting of the deposited coatings with aluminum in heating for brazing. This brazing method is referred to as contact-reactive brazing and is used widely for brazing aluminum alloys. This article provides an overview of the contact-reactive brazing process.

Evaluation of Developed Texture during Cold-Rolling Deformation of Ti-Nb-Ta-Zr Biocompatible Alloy

2013 ◽  
Vol 592-593 ◽  
pp. 366-369
Author(s):  
Vasile Danut Cojocaru ◽  
Isabelle Thibon ◽  
Doina Raducanu ◽  
Ion Cinca ◽  
Thierry Gloriant ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Orientation Distribution ◽  
Distribution Functions ◽  
Mechanical Processing ◽  
Specific Strength ◽  
High Specific Strength ◽  
Ti Alloys ◽  
Pole Figures ◽  
Cold Rolled ◽  
Rolling Deformation

During the last decade the titanium alloys were extensively used in a variety of applications due to their good mechanical properties, high biocompatibility and corrosion resistance. β-type Ti alloys composed of Nb, Ta and Zr elements have received much attention, because they feature high specific strength, bio-corrosion resistance, no allergic problems and biocompatibility. A Ti-29Nb-9Ta-10Zr (wt.%) alloy was subjected to thermo-mechanical processing and testing. Two states were investigated: recrystallized and 80% cold-rolled. Data concerning phase structure and developed texture, expressed by Inverse Pole Figures (IPFs) and Orientation Distribution Functions (ODFs), was obtained and analyzed.

Hardening Mechanism through Phase Separation of Beta Ti-35Nb-7Zr-5Ta and Ti-35Nb-7Ta Alloys

2012 ◽  
Vol 1487 ◽  
Author(s):  
C. R. M. Afonso ◽  
P. L. Ferrandini ◽  
R. Caram
Keyword(s):  
Phase Separation ◽  
Biomedical Applications ◽  
Metallic Materials ◽  
High Corrosion Resistance ◽  
Coherent Interface ◽  
Hardening Mechanism ◽  
Specific Strength ◽  
Β Phase ◽  
High Specific Strength ◽  
Low Elastic Modulus

AbstractThe β titanium alloys are highly attractive metallic materials for biomedical applications due to their high specific strength, high corrosion resistance and excellent biocompatibility, including low elastic modulus. The aim of this work is the evaluation of hardening mechanism through phase separation in β Ti-35Nb-7Zr-5Ta (TNZT) and Ti-35Nb-7Ta (TNT) alloys. Ingots (50 g) of TNZT and TNT alloys were arc-furnace melted in Ar(g)atmosphere. XRD using synchrotron radiation together with TEM and HRTEM analysis showed the coexistence of two separated phases (β and β’) with similar crystalline structures and slightly different lattice parameters in TNZT and TNT alloys. It was detected a heterogeneous microstructure alternating nanosized dark and bright regions (∼10 nm) with different compositions (Nb-rich β and Ta-Zr-rich β’).In aged condition (400ºC/4h), TNZT and TNT alloys undergoes coherent spinodal decomposition of β phase into two solid solution phases with coherent interface, different compositions and elastic strain associated with nanometric domains of Nb-rich β and Ta-(Zr)-rich β’ phases.

ALCOA 6262

Alloy Digest ◽  
1998 ◽  
Vol 47 (8) ◽  
Keyword(s):  
Residual Stress ◽  
Corrosion Resistance ◽  
Physical Properties ◽  
Surface Treatment ◽  
Tensile Properties ◽  
Surface Finish ◽  
High Strength ◽  
High Corrosion Resistance ◽  
Stress Control ◽  
Applied Coating

Abstract Alcoa 6262 alloy has good machinability with high strength, high corrosion resistance, excellent surface finish, and applied coating acceptance. The T8 temper offers excellent residual stress control. This datasheet provides information on composition, physical properties, and tensile properties. It also includes information on corrosion resistance as well as machining, joining, and surface treatment. Filing Code: AL-351. Producer or source: ALCOA Wire, Rod & Bar Division.

Research Development of the Laser Surface Modification to Improve the Corrosion-Resistance of Titanium and Titanium Alloys

2013 ◽  
Vol 748 ◽  
pp. 184-187 ◽  
Author(s):  
Hui Jun Yu
Keyword(s):  
Corrosion Resistance ◽  
Surface Modification ◽  
Titanium Alloys ◽  
Biomedical Applications ◽  
Influence Factors ◽  
Laser Surface ◽  
Laser Surface Modification ◽  
Specific Strength ◽  
High Specific Strength ◽  
Low Wear

Titanium and titanium alloys are widely used in aeronautical, marine, chemical and biomedical applications and so on, owing to their specific properties such as good corrosion resistance, low densities, high specific strength and modulus, and high-temperature resistance. However titanium and titanium alloys also have many disadvantages, such as low hardness, low wear-resistance and the low corrosion-resistance in some cases, which limit their wider application. Recent years, the corrosion resistance of titanium and titanium alloys is required to elevate in some fields. Proper surface modification can solve the problems effectively. This paper reviews the recent investigations of laser surface modification to improve the corrosion resistant of titanium and its alloys. The microstructures, the corrosion resistance properties, and the influence factors of the coatings were discussed systematically. And the future prospect of the further researches and uses is presented.

scholarly journals Novel Ultralight-Weight Complex Concentrated Alloys with High Strength

Materials ◽  
2019 ◽  
Vol 12 (7) ◽  
pp. 1136 ◽  
Author(s):  
Yuefei Jia ◽  
Yandong Jia ◽  
Shiwei Wu ◽  
Xindi Ma ◽  
Gang Wang
Keyword(s):  
Young’S Modulus ◽  
Young's Modulus ◽  
High Strength ◽  
Low Density ◽  
Light Alloys ◽  
Good Ductility ◽  
Specific Strength ◽  
High Specific Strength ◽  
Low Modulus

To explore a novel high strength and low modulus ultralight-weight complex concentrated alloys (ULW-CCAs), a series of light alloys are designed and explored based on some low-density and low modulus elements, such as Al, Li, Mg, Ca, Si, and Y. An Al19.9Li30Mg35Si10Ca5Y0.1 (at %) CCA with a high specific strength of 327 KPa·m−3 is successfully developed. After adjusting the composition, the Al15Li35Mg48Ca1Si1 CCA with the good compressive plasticity is successfully developed. The Al15Li38Mg45Ca0.5Si1.5 and Al15Li39Mg45Ca0.5Si0.5 CCAs exhibit good plasticity of >45%, and >60%, respectively. These ULW-CCAs show the high specific strength, good ductility, and low Young’s modulus, as compared with the previously reported CCAs.

Improved Structural Joint Concepts

2005 ◽  
Author(s):  
Carl May ◽  
Henry Wilson ◽  
J. Donn Hethcock ◽  
Tim Davis
Keyword(s):  
Composite Materials ◽  
Test Results ◽  
Lap Joint ◽  
Specific Strength ◽  
The Third ◽  
High Specific Strength ◽  
Joint Properties ◽  
Structural Joint ◽  
Structural Engineer ◽  
Materials Used

The joining of composite materials used in airframe structures has always presented a challenge to the structural engineer. As part of a Survivable Affordable Repairable Airframe Program (SARAP) agreement, research on three advanced joining concepts was conducted to identify and validate designs that would provide improved structural efficiency when compared to conventional joining methods. The first involves using finger joints in thin laminates to produce a joint with high specific strength compared to typical joining methods. The second utilizes a derivative of needling for stabilized dry fabric pre-forms to improve through-the-thickness laminate and joint properties. The third concept focuses on compression preload to improve the performance of a typical lap joint. Within each concept, coupon or element tests were used to validate the performance of these alternative configurations. This paper presents both analytical predictions and test results documenting the effects of these improved joining methods.

COMPARISON OF THE STRUCTURE OF MORBIDITY BY THE RESULTS OF PREVENTIVE MEDICAL EXAMINATIONS AND OF PROFESSIONAL MEDICAL EXAMINATIONS

2021 ◽  
Author(s):  
T.V. Veselova ◽  
◽  
D.V. Chentsov ◽  
Keyword(s):  
Musculoskeletal System ◽  
Digestive System ◽  
Metabolic Disorders ◽  
Circulatory System ◽  
Endocrine System ◽  
The Third ◽  
Different Types ◽  
Group 2 ◽  
Medical Examinations ◽  
Group 1

Abstract. The aim of the study was to compare the structure of morbidity revealed by the results of preventive medical examination with the structure of morbidity revealed by the results professional examination. Group 1 included 146 999 men aged 20-60, who underwent professional examination, group 2 - 424 770 men aged 21-60 who had undergone preventive medical examinations. In both groups, diseases of the circulatory system are in first place in terms of detection (group 1 – 24,37%, 2 – 41,41%). In second place in the course of preventive medical examinations are diseases of the endocrine system, nutritional disorders and metabolic disorders (16,94%), and in case of professional examination - diseases of the eye and its adnexa (15,46%). The third place in the course of professional examination is - diseases of the respiratory system (14,65%), with preventive medical examinations - diseases of the digestive system (9.83%). Since the diseases of the musculoskeletal system are not separately taken into account during the clinical examination, they are classified in the category «Other diseases». However, it should be noted that during the professional examination, this group of diseases is detected in 21% of cases. Taking into account the figures obtained for the detection of diseases of the musculoskeletal system, it seems important to focus the attention of occupational medicine specialists on this in order to develop and introduce measures to improve the health of the musculoskeletal system into corporate programs. These differences are associated with a different volume of research conducted for different types of medical examinations, as well as with the fact that a number of diseases of the circulatory system and the endocrine system are a contraindication for employment in contact with harmful labor factors. A higher level of detection of infectious pathology and neoplasms in case of professional examination requires a more thorough analysis.

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