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Online since: March 2016
Authors: Ting Biao Guo, Yu Tian Ding, Zhi Jia, Jun Cao
Introduction Ultrafine-grained materials have been studied by many scholars due to their excellent physical and mechanical properties.
This is an important process for a material’s microstructure and mechanical properties.
Therefore, these two factors make recrystallization more likely to occur.
Thus, for some metal materials, within a certain temperature range, the temperature will affect flow properties.
Therefore, deformation at a relative lower temperature and an appropriate speed is increased the material’s mechanical properties.
Online since: April 2010
Authors: Anatoly P. Babichev, Khaled Hamouda, Tahar Sayah, J.P. Ankudimov, P.J. Ankudimov, Mohamed Nadjib Benallal, D. Saidi, M.A. Djema
Complex Change in Superficial Layer Properties of Specimen Obtained by Metallurgical Powder under Vibration Process Method Khaled Hamouda 1, a, T.
The principle of the process depends on the properties of a work-piece, which is affected by the environment and mechanical behavior, or mechanical operation by the smallest particles, smoothing of its micro-roughness and plastic deformation of a superficial layer.
Also the process conditions can be summarized by: modes of vibration, characteristic of the process, coating technology and mechanical properties of the specimen.
The role of temperature is not limited by the decrease in resistance of a material to the plastic deformation and mechanical properties of metals and alloys, also with taking into consideration the temperature effect, a brittle zone will be found as a result of low and moderate degrees of temperature.
Technical properties for the machine with a heat chamber The purpose of the experimental study is featured by forming of an anticorrosion coating metal (aluminum, zinc compositions and their alloys) on preheating the powder materials.
Online since: February 2013
Authors: Arash Rashidi, Amir Mostafapour, Vahid Rezazadeh, Salar Salahi
FSP has been successfully applied to various aluminum alloys in order to improve their mechanical properties [4, 5].
In FSW and FSP, the critical process parameters, that could affect the weld quality and mechanical properties, are rotational speed, feed rate, tilt angle, plunge depth and tool design.
For investigating the channel properties a 9Mpix digital camera was utilized.
Comparison of fabricated channel properties between FSC and MFSC.
Giles TL, Zhilyaev AP, Srinivasan Swaminathan, Mahoney, The effect of friction stir processing on the microstructure and mechanical properties of an aluminum lithium alloy.
Online since: May 2022
Authors: Radu Cojocaru, Lia-Nicoleta Botila, Horia Florin Daşcău
The cost of magnesium and its alloys is one of the factors that limits their use on a very large scale (the cost of Mg is 3.5-6 times higher than that of steel and 1.7-2.8 times higher compared to that of aluminum) [1-5].
Magnesium-deformable alloys are of particular interest due to the possibility of obtaining more homogeneous structures and better mechanical properties, compared to similar parts made of cast alloys.
Due to the specific physical properties of magnesium, its welding requires low and well controlled energy.
Due to its very low electro-negative potential, magnesium is susceptible to galvanic corrosion, thus affecting the performance of mechanical joints in conductive environments.
Ebert, Magnesium: properties-applications-potential, Mater.
Online since: January 2013
Authors: Si Rong Yu, Jun Xu, Xiao Hua Zhang, Qiang Yao, Shu Miao Xu
An SII TG/DTA6300 differential thermal analyzer was used to determine the heat storage properties of these alloys.
After integrating a series of factors, Al-12Si-2Mg-15Cu alloy was selected as the heat storage alloy.
An obvious feature of solar radiation is that it is affected by weather factors such as the circadian variation, cloud and rain, etc.
According to these results, Al-12Si-2Mg-15Cu alloy and Al-12Si-5Mg-5Cu alloy had better thermal physical properties.
Effect of Thermal Cycles on the Thermal Physical Properties of Al-12Si-2Mg-15Cu Alloy.
Online since: October 2010
Authors: An Hua Peng, Zhi Ming Wang
Introduction Molded parts precision, performance and efficiency are the three main factors that slows down the development of RPM, in which the four main factors affecting accuracy of FDM parts can be summarized as follows: ① Errors caused by prototyping system, referring to the localization accuracy and repeatability of localization accuracy of nozzle motion; ② Principle errors caused during the triangulation and slicing process; ③ Errors caused by nozzle with a certain diameter; ④ Errors caused by material shrinkage.
Second, with temperature increasing, it gradually changes to high-elastic state and finally to melted state where it shows rheological property, very important property for FDM process.
Extrusion temperature determines the bonding properties of materials, accumulation property, filament material liquidility and extruded filament width.
However, not a fixed value is the width of extrusion filament, subject to influence of many factors such as nozzle diameter, layer thickness, extrusion speed, scanning speed, extrusion temperature, envelope temperature, coefficient of adhesion, shrinkage rate, and so on.
In addition, there also exist other factors affecting parts accuracy such as principle error, error caused by numerical control system and error caused by material shrinkage etc..
Online since: February 2017
Authors: Elammaran Jayamani, Sinin Hamdan, Muhammad Khusairy bin Bakri, Kok Heng Soon
This includes the use of traditional composites, such as carbon and glass fiber, as it is advantageously reasonable strong in their mechanical properties and performance.
The reason behind it was due to the facts of its lightweight, combustible, degradable and combustible factors.
The reasons behind increasing in sound absorption of the materials were due to several factors, such as fiber loading, types of fibers and etc.
Riva Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) and Wheat Straw Fibre Composites: Thermal, Mechanical Properties and Biodegradation Behavior.
Physical Parameters Affecting Acoustic Absorption Characteristics of Fibrous Materials.
Online since: December 2011
Authors: Wei Lin Xu, Gui Jie Liang, Jie Xu, Xiao Lin Shen, Mu Yao
The oligo-PEG, with small coil size, can be easily penetrated into mesopores of TiO2 photoelectrode, while the mechanical stability of the SPE can also be maintained by crosslinking.
The factor of weight ratio of CA cross linker in the hybrid plays an important role in determining the intersegmental distance and free volume of the polymer matrix, which sequentially affects the electrochemical activity of the conductive ions and then the ionic conductivity of the polymer electrolyte.
The oligo-PEG, with small coil size, can be easily penetrated into mesopores of TiO2 photoelectrode, while the mechanical and thermal stabilities of the SPE can also be maintained by crosslinking.
The Cyclic voltammetry (CV) and AC electrochemical impedance spectroscopy (EIS) were used to determine the electrochemical properties of the SPEs at room temperature by a PARSTAT2273 Advanced Electrochemical System (Princeton, America).
The weight ratio of CA affected the molecular aggregation structure of the synthesized polymer matrix.
Online since: August 2020
Authors: Alexey Vasilchenko, Artem Ruban, Oleksandr Blyznyuk, Yuliia Bezuhla
Effect of content of synthetic aluminosilicates in medium-density polyethylene on the fire hazard characteristics and mechanical properties of compositions is investigated.
These fire retardants are entered both individually and in the form of synergistic mixtures, given their effect on the change in the complex of mechanical, dielectric and other properties.
In the article effect of finely dispersed inorganic fillers on the thermal and mechanical properties of polyethylene compositions was studied.
The fire hazard properties of the samples of compositions were studied by the method of fire tube according to DSTU EN ISO 4589-3:2018 [14], the oxygen index was determined according to DSTU-N B EN 1991-1-2:2010 [20], and the mechanical properties were studied according to DSTU EN ISO 527-2:2018 [19].
In terms of their physical and mechanical properties, the studied compositions are not inferior to the known ones.
Online since: May 2016
Authors: Lu Min Chen, Qi Lin
Flow properties of powder are the result of collective forces acting on the individual particles.
The flow of particulates affects manufacturing efficiency and dictates the quality of the end product, so many industries still rely heavily on flow properties.
The flow properties of particulates depend upon the combined effects of a large number of physical and environmental variables.
Here we focused on some factors to explore: Fig.3 is the influence of some factors on the particle orientation.
In optimization design, this paper analyzes several main factors affecting the deflection angle of particles, selected level according to actual need, not consider interactions between factors and meet the requirements of test design
Showing 9211 to 9220 of 25935 items