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Online since: September 2019
Authors: Adel Saoudi, Farida Khamouli, Djahida Lerari, Khaldoun Bachari, L'Hadi Atoui
Thermomechanical treatment is known to improve the mechanical properties of metallic materials.
The correlation between mechanical properties, chemical composition and/or process parameters was widely investigated by neural networks modelling.
For instance, Khalaj et al. [15] investigated the effect of chemical composition coupled with some mechanical properties on the ultimate tensile strength of API X70 whereas Azimzadegan et al. [16] studied the impact properties of this steel.
Thus, final mechanical properties of high strength low alloy steels are directly affected by ferrite grain size.
According to this figure, all sensitivity factors are positive.
The correlation between mechanical properties, chemical composition and/or process parameters was widely investigated by neural networks modelling.
For instance, Khalaj et al. [15] investigated the effect of chemical composition coupled with some mechanical properties on the ultimate tensile strength of API X70 whereas Azimzadegan et al. [16] studied the impact properties of this steel.
Thus, final mechanical properties of high strength low alloy steels are directly affected by ferrite grain size.
According to this figure, all sensitivity factors are positive.
Online since: April 2013
Authors: Yong Ho Choi, Ki Bong Han
Carbon nanotube has attracted great research attentions due to its outstanding electrical, physical, mechanical, chemical properties.
Based on its excellent properties, the carbon nanotube is promising nanoscale material for novel electrical, mechanical, chemical, and biological devices and sensors.
Introduction Carbon nanotube (CNT) has attracted great research attentions due to its outstanding electrical, physical, mechanical, chemical properties.[1-5] Based on its excellent properties, CNT is promising nanoscale material for novel electrical, mechanical, chemical, and biological devices and sensors. [4-8] Depending on the number of walls, CNT is categorized into single walled carbon nanotube (SWCNT) and multi walled carbon nanotube (MWCNT).
The several factors of etching CNTs film were systematically studied.
Electronic properties of single-walled carbon nanotube networks.
Based on its excellent properties, the carbon nanotube is promising nanoscale material for novel electrical, mechanical, chemical, and biological devices and sensors.
Introduction Carbon nanotube (CNT) has attracted great research attentions due to its outstanding electrical, physical, mechanical, chemical properties.[1-5] Based on its excellent properties, CNT is promising nanoscale material for novel electrical, mechanical, chemical, and biological devices and sensors. [4-8] Depending on the number of walls, CNT is categorized into single walled carbon nanotube (SWCNT) and multi walled carbon nanotube (MWCNT).
The several factors of etching CNTs film were systematically studied.
Electronic properties of single-walled carbon nanotube networks.
Online since: June 2014
Authors: Yu Tao Xu, Dan Jiang, Jian Feng Ren, Shu Tao Zhao
Introduction
In power system, the mechanical properties parameter of high voltage circuit breaker (HV) is an important basis of judgment and guarantee the normal work of the circuit breaker, it has a close relationship with safe and reliable of power grid [1].
In the test of high voltage circuit breaker's mechanical characteristic parameters, the parameters about breaker’s moving contact is very important.
K-means clustering algorithm is a continuously iterative process, the main factors of influencing the clustering results are as follows: number of clustering k, the initial clustering center and the distance between objects .
Due to the L * a * b color space separate color and brightness thoroughly, it overcome influence of illumination of color differentiation, the factors affecting the size of the weighted Euclidean distance is mainly on the *a and *b, the weighted of and *b should as far as possible big, and because the object of study mainly distributed on *a coordinates, so it should have a maximum value, after repeated experiments, the best values are: 0.01, 1.00, 0.1.
For this purpose, the segmentation result affects the final experiment results directly, in view of the different types of images, the final segmentation quality evaluation indexes are different.
In the test of high voltage circuit breaker's mechanical characteristic parameters, the parameters about breaker’s moving contact is very important.
K-means clustering algorithm is a continuously iterative process, the main factors of influencing the clustering results are as follows: number of clustering k, the initial clustering center and the distance between objects .
Due to the L * a * b color space separate color and brightness thoroughly, it overcome influence of illumination of color differentiation, the factors affecting the size of the weighted Euclidean distance is mainly on the *a and *b, the weighted of and *b should as far as possible big, and because the object of study mainly distributed on *a coordinates, so it should have a maximum value, after repeated experiments, the best values are: 0.01, 1.00, 0.1.
For this purpose, the segmentation result affects the final experiment results directly, in view of the different types of images, the final segmentation quality evaluation indexes are different.
Online since: April 2015
Authors: Andrzej Kiełbus, Bartłomiej Dybowski, Mirosław Szala, Tadeusz Hejwowski
As the protectors work in water environment, one of the main degradation factors is cavitation erosion.
Introduction Magnesium alloys are promising structural material due to their low density and acceptable mechanical properties [1].
This led to development of magnesium alloys containing rare earth elements, which exhibit better properties.
As the sacrificial anodes are used mainly in protection of hulls of ships, one of the factors strongest affecting their operating time are mass losses created due to cavitation erosion.
McNaughton, Correlation of cavitation erosion behavior with mechanical properties of metals, Wear. 140 (1990) pp. 63–82
Introduction Magnesium alloys are promising structural material due to their low density and acceptable mechanical properties [1].
This led to development of magnesium alloys containing rare earth elements, which exhibit better properties.
As the sacrificial anodes are used mainly in protection of hulls of ships, one of the factors strongest affecting their operating time are mass losses created due to cavitation erosion.
McNaughton, Correlation of cavitation erosion behavior with mechanical properties of metals, Wear. 140 (1990) pp. 63–82
Online since: May 2012
Authors: Da Jun Yuan, Xue Yan Liu, Ming Jing Jiang
So it’s important to carry out research on the soil tensile properties and the tension fracturing mechanism.
But perfect constitutive models to describe the extension properties of clay have not been established.
DEM can simulate the loading process of soil vary from strain softening to strain hardening[15], This provides a new way to explore soil mechanical properties.
In this paper, the soil properties are studied though biaxial compression test and biaxial extension test.
But in the unloading process, mechanical properties of the sample displays significantly different from the loading process.
But perfect constitutive models to describe the extension properties of clay have not been established.
DEM can simulate the loading process of soil vary from strain softening to strain hardening[15], This provides a new way to explore soil mechanical properties.
In this paper, the soil properties are studied though biaxial compression test and biaxial extension test.
But in the unloading process, mechanical properties of the sample displays significantly different from the loading process.
Online since: April 2012
Authors: Joanna Michalska
Hydrogen entering into steel affects its electrochemical properties and may enhance the susceptibility to environmental degradation.
Hydrogen entering into steel affects its electrochemical properties and may enhance the susceptibility to environmental degradation [1].
The effect of hydrogen on the microstructure and mechanical properties of stainless steels are well documented [2-4], while the effect of hydrogen on passivity and corrosion resistant has been reported to a lesser extent.
Industrial systems made from these steels are usually designed for a 40-year service life and long-term mechanical and corrosion properties.
Therefore, it is also of great importance to examine the effect of hydrogen on electrochemical properties of superaustenitic and austenitic-ferritic steels.
Hydrogen entering into steel affects its electrochemical properties and may enhance the susceptibility to environmental degradation [1].
The effect of hydrogen on the microstructure and mechanical properties of stainless steels are well documented [2-4], while the effect of hydrogen on passivity and corrosion resistant has been reported to a lesser extent.
Industrial systems made from these steels are usually designed for a 40-year service life and long-term mechanical and corrosion properties.
Therefore, it is also of great importance to examine the effect of hydrogen on electrochemical properties of superaustenitic and austenitic-ferritic steels.
Online since: December 2012
Authors: Sina Alizadeh Ashrafi, Ali Davoudinejad, Abdolkarim Niazi
Aluminum alloys offer number of various interesting mechanical and thermal properties which classified them among most commonly used lightweight metallic materials.
In this study cutting speed and feed rate variations mostly affected surface roughness and tool life.
A Comparative Study on the Microstructures and Mechanical Properties of Al 6061 Alloy and the MMC Al 6061/TiB2/12p.
Met, Some factors affecting wear on cemented carbide tools, Inst.
[5] Joseph R.Davis et al, Properties and Selection: Nonferrous Alloys and Special-Purpose Materials,Volume 2,Metals Handbook ,10th Edition 1990
In this study cutting speed and feed rate variations mostly affected surface roughness and tool life.
A Comparative Study on the Microstructures and Mechanical Properties of Al 6061 Alloy and the MMC Al 6061/TiB2/12p.
Met, Some factors affecting wear on cemented carbide tools, Inst.
[5] Joseph R.Davis et al, Properties and Selection: Nonferrous Alloys and Special-Purpose Materials,Volume 2,Metals Handbook ,10th Edition 1990
Online since: May 2007
Authors: Bai Xiang Hu, Guo Liang Zheng, Pin Qi Xia
MRF
materials experience reversible changes in physical properties such as viscosity, plasticity, elasticity
and shear modulus when subjected to different magnetic fields.
They studied the vibration problem of a simply supported sandwich beam with an MRF core and discussed the variable properties of MRF in structural vibration control.
The natural frequencies and loss factors of MRF sandwich beam are investigated by means of numerical simulating and experimental study.
Al has low damping and relatively high stiffness properties compared with those of MRF.
factors are shifted to a higher lever when the applied magnetic field increases.
They studied the vibration problem of a simply supported sandwich beam with an MRF core and discussed the variable properties of MRF in structural vibration control.
The natural frequencies and loss factors of MRF sandwich beam are investigated by means of numerical simulating and experimental study.
Al has low damping and relatively high stiffness properties compared with those of MRF.
factors are shifted to a higher lever when the applied magnetic field increases.
Online since: October 2012
Authors: Quan Xiao Liu, Wen Cai Xu, Yan Na Yin
Introduction
Surface sizing is mainly to increase paper mechanical strength, smoothness, glossiness, printability and other properties in paper industry [1-3].
The factors, which affect the printing gloss paper, are mainly surface smoothness, gloss, etc.
The factors, which affect the printing gloss paper, are mainly surface smoothness, gloss, etc.
However, with thicker coatings, paper folding and tear substantially reduced, and the coating viscosity increase, affecting the printing operation.
The mechanical properties of sized papers were compared, the results shown in Table 6.
The factors, which affect the printing gloss paper, are mainly surface smoothness, gloss, etc.
The factors, which affect the printing gloss paper, are mainly surface smoothness, gloss, etc.
However, with thicker coatings, paper folding and tear substantially reduced, and the coating viscosity increase, affecting the printing operation.
The mechanical properties of sized papers were compared, the results shown in Table 6.
Online since: January 2019
Authors: Qiang Shen, Qiang Guo Luo, Ke Jia Kang, Peng Fan, Jian Zhang, Lian Meng Zhang
The effects of SiC additions (from 0.5 to 3wt%) on the microstructure and mechanical properties are mainly investigated.
Fischmeister, Controlling factors for the Brittle-to-Ductile Transition in Tungsten Single Crystals, Science, 282(1998) 1293-1295
Hong, The effect of HfC content on mechanical properties HfC-W composites, Int.
Ning, Microstructure and mechanical properties of W-Zr reactive materials, Mater.
Hong, Microstructure and mechanical properties of SiC-nanowire-augmented tungsten composites, J.
Fischmeister, Controlling factors for the Brittle-to-Ductile Transition in Tungsten Single Crystals, Science, 282(1998) 1293-1295
Hong, The effect of HfC content on mechanical properties HfC-W composites, Int.
Ning, Microstructure and mechanical properties of W-Zr reactive materials, Mater.
Hong, Microstructure and mechanical properties of SiC-nanowire-augmented tungsten composites, J.