scholarly journals Study of the Influence of the Granulometric Composition of Electrospark Cobalt-Chromium Powders on the Physical and Mechanical Properties of Additive Products

2019 ◽  
Vol 23 (4) ◽  
pp. 57-71
Author(s):  
E. V. Ageev ◽  
A. Y. Altuhov ◽  
A. N. Novikov
Keyword(s):  
Mechanical Properties ◽  
Granulometric Composition ◽  
Physical And Mechanical Properties ◽  
Cobalt Chromium

Physical and Mechanical Properties of Injection Molded Co-Cr-Mo Alloy Powder for Orthopedic Applications

2016 ◽  
Vol 1133 ◽  
pp. 80-84
Author(s):  
Nurhaslina Johari ◽  
Rosliza Sauti ◽  
Noorsyakirah Abdullah ◽  
Nurazilah Mohd Zainon ◽  
Bakar Meh ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heating Rate ◽  
Physical And Mechanical Properties ◽  
Magnetic Behavior ◽  
High Strength ◽  
Extraction Process ◽  
Cobalt Chromium ◽  
Surgical Implants ◽  
Injection Molded ◽  
Superior Corrosion Resistance

Cobalt-chromium alloys are commonly used for surgical implants because of their high strength, superior corrosion resistance, non-magnetic behavior, and biocompatibility. Cobalt-Chromium-Molybdenum (Co-Cr-Mo) applications include prosthetic replacements of hips. This paper presents the attempt to produce metallic implant using Co-Cr-Mo powder by MIM process, focusing on the effects of different heating rate during sintering process at 1380°C. Co-Cr-Mo powder were mixed homogeneously with palm oil and conventional binders respectively with powder loading 65 vol% and was injection molded using vertical injection molding machine with the nozzle temperature of 160°C to produce green compacts. The binders then was removed by solvent extraction process and sintered in vacuum condition at atmosphere 10-5 mbar at temperature 1380 °C with varied heating rate; 0.5°C/min, 1.0°C/min and 3.0°C/min . Results indicated that sintered density and tensile strength varied from 8.100 gcm-3 to 8.200 gcm-3 and 546.971 MPa to 798.767 MPa respectively. The mechanical properties comply with the international standard (ASTM F75).

Sintering Effects on the Microstructure and Mechanical Properties of CoCrMo Alloy

2016 ◽  
Vol 1133 ◽  
pp. 259-263 ◽  
Author(s):  
Mohd Hasnan Abdull Hamid ◽  
Fazira Suriani Mohamed Fadzil ◽  
Mohd Asri Selamat ◽  
M.A. Ahmad
Keyword(s):  
Mechanical Properties ◽  
Sintering Temperature ◽  
Rupture Strength ◽  
Physical And Mechanical Properties ◽  
Hydraulic Press ◽  
Zinc Stearate ◽  
Knee Joints ◽  
Cobalt Chromium ◽  
Cocrmo Alloy ◽  
Microstructure And Mechanical Properties

Cobalt chromium molybdenum (CoCrMo) alloy is widely used in artificial hip and knee joints because of their excellence corrosion and wear resistance, as well as good mechanical properties and biocompatibility. This study investigates the effect of sintering temperature on the microstructure and mechanical properties of CoCrMo using powder metallurgy technique. CoCrMo powder was mixed with zinc stearate and then put into the shaker mixer at 65 rpm for 3 hours. The powder was then compacted at a pressure of 18T using an automated hydraulic press and sintered at a temperature in the range of 1200 – 1400 °C under 95 Vol% N2/ 5 Vol% H2atmosphere. The microstructure, physical and mechanical properties of the samples are analyzed using scanning electron microscopy (SEM), Vickers’s microhardness tester and transverse rupture strength (TRS). The study reveals that the density, hardness and strength of CoCrMo samples increase as sintering temperature increases.

Forecasting Water Saturation of Fill Grounds in Urban Infrastructure Conditions by Mathematical Modeling Based on the Main Hydrophysical Characteristic

2018 ◽  
Vol 9 (3) ◽  
pp. 485
Author(s):  
Anna V. CHELOVECHKOVA ◽  
Irina V. KOMISSAROVA ◽  
Dmitry I. EREMIN
Keyword(s):  
Mathematical Modeling ◽  
Mechanical Properties ◽  
Mathematical Model ◽  
Granulometric Composition ◽  
Water Saturation ◽  
Physical And Mechanical Properties ◽  
Urban Infrastructure ◽  
Regression Equations ◽  
Wide Range ◽  
Software Product

A technique is proposed for forecasting water saturation of fill and undisturbed grounds used in construction when making a foundation. Dependencies are established between the content of individual granulometric fractions of grounds and their physico-mechanical properties. Reliable regression equations are obtained, which formed the basis of a mathematical model for predicting the water saturation of grounds. A software product has been developed, the work of which was tested using the example of the basic hydro-physical characteristics of the grounds differing in their properties (black earth and salt earth). The results obtained reliably prove the possibility of using the model and software product in a wide range of granulometric composition values and physical and mechanical properties of grounds.

Obtaining Fine-Grained Concrete with the Use of Ash Gidrogelei and Conducting Final Testing

2019 ◽  
Vol 802 ◽  
pp. 69-77
Author(s):  
Alexandra Viktorovna Semenyutina ◽  
Igor Yuryevich Podkovyrov ◽  
Galina Vladimirovna Podkovyrova ◽  
Viktoria Alekseevna Semenyutina
Keyword(s):  
Mechanical Properties ◽  
Power Plants ◽  
Granulometric Composition ◽  
Physical And Mechanical Properties ◽  
Fine Grained ◽  
Ash And Slag Waste ◽  
Slag Waste

The article is devoted to the use of waste power plants. The basic physical and mechanical properties are investigated and the optimal compositions of fine concrete are developed. The optimal granulometric composition of ash and slag waste was selected for use as aggregates for concrete

PEMANFAATAN KAYU AKASIA MANGIUM (Acacia mangium Willd) UNTUK MEBEL

2012 ◽  
Vol 4 (1) ◽  
pp. 1
Author(s):  
Djoko Purwanto
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Physical Properties ◽  
Treatment Process ◽  
Acacia Mangium ◽  
Physical And Mechanical Properties ◽  
Wood Fibers ◽  
Test Parameters ◽  
Mechanical And Physical Properties ◽  
Scale Scores

Timber Acacia mangium (Acacia mangium, Willd) for Furniture. The study aims to determine the mechanical and physical properties and the decorative value (color and fiber) wood of acacia mangium with using finishing materials. This type of finishing material used is ultran lasur natural dof ,ultran lasur classic teak, aqua politur clear dof, aqua politur akasia dan aqua politur cherry. After finishing the wood is stored for 3 months. Test parameters were observed, namely, physical and mechanical properties of wood, adhesion of finishing materials, color and appearance of the fiber, and timber dimensions expansion. The results showed that the mechanical physical properties of acacia wood qualified SNI. 01-0608-89 about the physical and mechanical properties of wood for furniture, air dry the moisture content from 13.78 to 14.89%, flexural strength from 509.25 to 680.50 kg/cm2, and compressive strength parallel to fiber 342.1 - 412.9 kg/cm2. Finishing the treatment process using five types of finishing materials can increase the decorative value (color and fiber) wood. Before finishing the process of acacia mangium wood has the appearance of colors and fibers and less attractive (scale scores 2-3), after finishing acacia wood fibers have the appearance of colors and interesting and very interesting (scale 4-5).Keywords: mangium wood, mechanical properties, decorative value, finishing, furniture.

Physical and Mechanical Properties of Tenun Pahang Fabrics using Alternative Yarns

2016 ◽  
Vol 13 (2) ◽  
pp. 67
Author(s):  
Engku Liyana Zafirah Engku Mohd Suhaimi ◽  
Jamil Salleh ◽  
Suzaini Abd Ghani ◽  
Mohamad Faizul Yahya ◽  
Mohd Rozi Ahmad
Keyword(s):  
Mechanical Properties ◽  
Physical And Mechanical Properties ◽  
The Other ◽  
Silk Fabrics ◽  
Recovery Angle ◽  
Made In

An investigation on the properties of Tenun Pahang fabric performances using alternative yarns was conducted. The studies were made in order to evaluate whether the Tenun Pahang fabric could be produced economically and at the same time maintain the fabric quality. Traditional Tenun Pahang fabric uses silk for both warp and weft. For this project, two alternative yarns were used which were bamboo and modal, which were a little lower in cost compared to silk. These yarns were woven with two variations, one with the yarns as weft only while maintaining the silk warp and the other with both warp and weft using the alternative yarns. Four (4) physical testings and three (3) mechanical testings conducted on the fabric samples. The fabric samples were evaluated including weight, thickness, thread density, crease recovery angle, stiffness and drapability. The results show that modal/silk and bamboo silk fabrics are comparable in terms of stiffness and drapability, hence they have the potential to replace 100% silk Tenun Pahang.

Basic set of experiments for determination of mechanical properties of sand

2014 ◽  
Vol 62 (1) ◽  
pp. 129-137
Author(s):  
A. Sawicki ◽  
J. Mierczyński
Keyword(s):  
Mechanical Properties ◽  
Soil Mechanics ◽  
Physical And Mechanical Properties ◽  
Local Strain ◽  
Initial State ◽  
Laboratory Equipment ◽  
Additional Information ◽  
Basic Set ◽  
Initial Anisotropy

Abstract A basic set of experiments for the determination of mechanical properties of sands is described. This includes the determination of basic physical and mechanical properties, as conventionally applied in soil mechanics, as well as some additional experiments, which provide further information on mechanical properties of granular soils. These additional experiments allow for determination of steady state and instability lines, stress-strain relations for isotropic loading and pure shearing, and simple cyclic shearing tests. Unconventional oedometric experiments are also presented. Necessary laboratory equipment is described, which includes a triaxial apparatus equipped with local strain gauges, an oedometer capable of measuring lateral stresses and a simple cyclic shearing apparatus. The above experiments provide additional information on soil’s properties, which is useful in studying the following phenomena: pre-failure deformations of sand including cyclic loading compaction, pore-pressure generation and liquefaction, both static and caused by cyclic loadings, the effect of sand initial anisotropy and various instabilities. An important feature of the experiments described is that they make it possible to determine the initial state of sand, defined as either contractive or dilative. Experimental results for the “Gdynia” model sand are shown.

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