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Online since: July 2017
Authors: Dmitrij Chernikov, Vladimir Glushchenkov
Process schemes and factors improving adhesive properties and wetting quality of the fiber with the alloy are shown.
Moderate thermal effect, the kinetic pressure and other factors of external action can change distance between atoms within few percent and are unable to affect this discrepancy and, as a consequence, the surface energy and wetting quality.
All mechanical characteristics of the obtained samples are higher in comparison with the foundry alloy AlSi9Mg.
Melt treatment by pulsed magnetic fields aimed at controlling the structure and properties of industrial silumins // Russian Journal of Non-Ferrous Metals. 2016.
[5] Li S.H., Chao C.G., «Effects of carbon fiber/Al interface on mechanical properties of carbon-fiber-reinforced aluminum-matrix composites» Met. & Mat.
Moderate thermal effect, the kinetic pressure and other factors of external action can change distance between atoms within few percent and are unable to affect this discrepancy and, as a consequence, the surface energy and wetting quality.
All mechanical characteristics of the obtained samples are higher in comparison with the foundry alloy AlSi9Mg.
Melt treatment by pulsed magnetic fields aimed at controlling the structure and properties of industrial silumins // Russian Journal of Non-Ferrous Metals. 2016.
[5] Li S.H., Chao C.G., «Effects of carbon fiber/Al interface on mechanical properties of carbon-fiber-reinforced aluminum-matrix composites» Met. & Mat.
Online since: February 2013
Authors: Saleh A. Aboukhres, Ali S. Zayed, Hisham A. Ayad, S. Ganesan
Properties of sea waves.
There are some advantageous properties in sea waves that encourage the usage of this source of energy [4], as for example: ¨ Wave energy contains much more kinetic energy compared with wind
¨ Sea waves are the result of wind energy; therefore, it may become ineffective for a period of time depending on some factors as geographical place, season of the year and other weather conditions.
This important factor affects the structure of the system and selection of the right place for this project.
Cnnclusion For designing of projects as the one proposed in this paper, we need to take care of many factors that influence the different characteristics of production.
There are some advantageous properties in sea waves that encourage the usage of this source of energy [4], as for example: ¨ Wave energy contains much more kinetic energy compared with wind
¨ Sea waves are the result of wind energy; therefore, it may become ineffective for a period of time depending on some factors as geographical place, season of the year and other weather conditions.
This important factor affects the structure of the system and selection of the right place for this project.
Cnnclusion For designing of projects as the one proposed in this paper, we need to take care of many factors that influence the different characteristics of production.
Online since: January 2011
Authors: Chen Huang, Hao Wang
Introduction
Silk fabric has graceful appearance and excellent wearing properties so that it has been welcomed by the consumers.
But on the influence of external environmental factors such as UV light, moisture and oxygen, silk fiber has photo-oxidation reaction leading to the degradation of silk protein molecules and become yellow and brittle[1,2,3], which seriously affect silk fabric’s wearing characteristics.
This research investigated changes of the weight and mechanical properties of silk fabrics treated with or without two metal ions (copper sulfate solution and chromium sulfate solution) in different time of light conditions in order to find the way to increase the photostability of silk.
(2) Determination of mechanical properties.
Photodegradation can cause reduction of the weight and tensile properties of the fabric samples, therefore change relation of weight loss and tensile properties of the treated fabrics in sunlight was investigated.
But on the influence of external environmental factors such as UV light, moisture and oxygen, silk fiber has photo-oxidation reaction leading to the degradation of silk protein molecules and become yellow and brittle[1,2,3], which seriously affect silk fabric’s wearing characteristics.
This research investigated changes of the weight and mechanical properties of silk fabrics treated with or without two metal ions (copper sulfate solution and chromium sulfate solution) in different time of light conditions in order to find the way to increase the photostability of silk.
(2) Determination of mechanical properties.
Photodegradation can cause reduction of the weight and tensile properties of the fabric samples, therefore change relation of weight loss and tensile properties of the treated fabrics in sunlight was investigated.
Online since: November 2006
Authors: Carlos Maurício Fontes Vieira, Sérgio Neves Monteiro
Effect of the Particle Size of the Grog on the Properties and Microstructure of Bricks
C.
The effect of the grog addition up to 20 wt.% on the properties and microstructure of bricks fired at 700 o C was evaluated.
The results indicated that both the particle size and the amount of grog addition changed the fired properties of the clayey body.
Dried technological properties of the compositions.
Fired technological properties of the compositions.
The effect of the grog addition up to 20 wt.% on the properties and microstructure of bricks fired at 700 o C was evaluated.
The results indicated that both the particle size and the amount of grog addition changed the fired properties of the clayey body.
Dried technological properties of the compositions.
Fired technological properties of the compositions.
Online since: March 2015
Authors: Yan Li, Jian Can Yang, Zhen Liu
The mechanical properties of these welded joints were investigated.
The loss of rare earth oxides of electrode had little effect on the mechanical properties of welded joints.
From Table 5, it can be seen that the mechanical properties of the three specimens are close.
Therefore, the loss of rare earth oxides had little effect on the mechanical properties of welded joints.
The loss of rare earth oxides of electrode had little effect on the mechanical properties of welded joints.
The loss of rare earth oxides of electrode had little effect on the mechanical properties of welded joints.
From Table 5, it can be seen that the mechanical properties of the three specimens are close.
Therefore, the loss of rare earth oxides had little effect on the mechanical properties of welded joints.
The loss of rare earth oxides of electrode had little effect on the mechanical properties of welded joints.
Online since: September 2017
Authors: Mirabela Georgiana Minciună, Petrică Vizureanu, Mohd Mustafa Al Bakri Abdullah, Andrei Victor Sandu, Dragoș Cristian Achiței
After quenching and tempering heat treatments, are obtained good mechanical properties in biphasic alloys, maintaining the plasticity characteristics in reasonable limits.
Vanadium influence on mechanical properties of Ti-Al alloys Fig. 2.
The alloy has a good corrosion resistance in different corrosive solutions and high mechanical properties (Fig. 2).
These alloys are sensitive to actions of non-metallic inclusions, which affect the mechanical properties [7,8,9].
The obtained values are in the 50...60 HRC limits, fact that guarantee good mechanical properties.
Vanadium influence on mechanical properties of Ti-Al alloys Fig. 2.
The alloy has a good corrosion resistance in different corrosive solutions and high mechanical properties (Fig. 2).
These alloys are sensitive to actions of non-metallic inclusions, which affect the mechanical properties [7,8,9].
The obtained values are in the 50...60 HRC limits, fact that guarantee good mechanical properties.
Online since: July 2013
Authors: Carlos A. Mora Santos, Orlando Susarrey Huerta, Vicente Flores Lara, Jorge Bedolla Hernández, Maribel A. Mendoza Nuñez
Some main mechanical properties such as elastic moduli, elongation and creep depend on the fiber properties [16].
Fig. 1 Microstructure of filter paper Filter paper, whose physical and mechanical properties are shown in Table 1, has a well-defined anisotropy in their mechanical properties associated with a elasto-plastic behavior in a preferential orientation of the fibers in the Machine Direction (MD), Figure 2.
Table 1 Physical and Mechanical Properties of Filter Paper.
Properties and Performance of Natural-Fiber Composites.
Fiber properties and their influence on paper structure.
Fig. 1 Microstructure of filter paper Filter paper, whose physical and mechanical properties are shown in Table 1, has a well-defined anisotropy in their mechanical properties associated with a elasto-plastic behavior in a preferential orientation of the fibers in the Machine Direction (MD), Figure 2.
Table 1 Physical and Mechanical Properties of Filter Paper.
Properties and Performance of Natural-Fiber Composites.
Fiber properties and their influence on paper structure.
Online since: October 2013
Authors: Chen Yan, Lin Pan, Zhu Lin
On the foundation of researching adhesion mechanism of superalloy honing stone, theoretical analysis and mathematical modeling of parameters were made that affecting the wear particle adhesion rate of superalloy honing stone, then inspect and verify the relation between the adhesion rate and processing parameters through the experiment.
For mechanical properties such as good high temperature plastic and low thermal conductivity, in early grinding , namely happens that the abrasive particles or the surface adheres to the superalloy material, the adhesion covers the oilstone effective grinding surface, which leads to a partial or full loss of cutting ability, and serious adhesion may result in the abrasive particles blunting, grinding force and temperature increasing, then oilstones lose cutting ability quickly, which will greatly reduce the grinding efficiency.
The oilstone adhesion is the result of a comprehensive action of many factors, so the adhesion rate is a function of multiple-factor.
In order to discuss the relationship between the adhesion mechanism and the adhesion rate as well as the influencing factors, it is crucial to build the mathematical model of the oilstone adhesion rate.
It reflects the influence on the adhesion rate related to the physical and mechanical properties of superalloy, the grinding characteristics of oilstones and honing parameters.
For mechanical properties such as good high temperature plastic and low thermal conductivity, in early grinding , namely happens that the abrasive particles or the surface adheres to the superalloy material, the adhesion covers the oilstone effective grinding surface, which leads to a partial or full loss of cutting ability, and serious adhesion may result in the abrasive particles blunting, grinding force and temperature increasing, then oilstones lose cutting ability quickly, which will greatly reduce the grinding efficiency.
The oilstone adhesion is the result of a comprehensive action of many factors, so the adhesion rate is a function of multiple-factor.
In order to discuss the relationship between the adhesion mechanism and the adhesion rate as well as the influencing factors, it is crucial to build the mathematical model of the oilstone adhesion rate.
It reflects the influence on the adhesion rate related to the physical and mechanical properties of superalloy, the grinding characteristics of oilstones and honing parameters.
Online since: November 2013
Authors: Hong Zhi Cui, Wei Lun Wang, Peng Yang
These basic parameters can be used to describe the linear and non-linear visco-elastic properties and even the destruction properties usually.
Thus, larger range of information of asphalt mixture can be analyzed without time and equipment constraints.As typical visco-elastic material, the properties of asphalt mixture are affected by many factors (such as temperature, frequency, time and load) and can not be derived easily.
Through nonlinear least squares fitting and time-temperature principle, the master curve and the factors were derived.
At 50℃, both shift factors were identical.
Fig.2 Fitting result of shift factors for A and B mixtures at 40℃ Usually, the master curve at certain temperature could be taken as reference when the impact of frequency on the properties of asphalt mixture was studied.
Thus, larger range of information of asphalt mixture can be analyzed without time and equipment constraints.As typical visco-elastic material, the properties of asphalt mixture are affected by many factors (such as temperature, frequency, time and load) and can not be derived easily.
Through nonlinear least squares fitting and time-temperature principle, the master curve and the factors were derived.
At 50℃, both shift factors were identical.
Fig.2 Fitting result of shift factors for A and B mixtures at 40℃ Usually, the master curve at certain temperature could be taken as reference when the impact of frequency on the properties of asphalt mixture was studied.
Online since: March 2004
Authors: I.S. Kim, Baig Gyu Choi, Seong Moon Seo, Chang Yong Jo
Microstructural evolution during high temperature exposure and its effects on tensile and
stress rupture properties of the Ni-base superalloy B1900 have been studied.
The resultant microstructure may alter mechanical properties of the alloy significantly.
Size and volume fraction of �� particle and temperature are important factors that govern deformation mechanism of particle cutting or dislocation by-passing [4].
Tensile and stress rupture tests were applied to compare mechanical properties of the as-cast and thermally exposed specimens.
It is well known that the rafted structure of �/�� improves creep properties of superalloys at high temperature.
The resultant microstructure may alter mechanical properties of the alloy significantly.
Size and volume fraction of �� particle and temperature are important factors that govern deformation mechanism of particle cutting or dislocation by-passing [4].
Tensile and stress rupture tests were applied to compare mechanical properties of the as-cast and thermally exposed specimens.
It is well known that the rafted structure of �/�� improves creep properties of superalloys at high temperature.