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Online since: June 2013
Authors: Gerhard Hirt, Markus Daamen, Silvia Richter
High-manganese TWIP steels are characterized by their extraordinary mechanical properties.
The investigations focused especially on the mechanical properties as a function of microstructure and twinning.
In addition to the increased demands on the mechanical properties, the required steel quality and thus the requirements for the production have also increased rapidly.
In addition to the production, the focus is placed especially on the microstructure, mechanical properties and the dominant forming mechanisms.
Charles, Effect of Second-Phase Particles on the Mechanical Properties of Steel, M.
The investigations focused especially on the mechanical properties as a function of microstructure and twinning.
In addition to the increased demands on the mechanical properties, the required steel quality and thus the requirements for the production have also increased rapidly.
In addition to the production, the focus is placed especially on the microstructure, mechanical properties and the dominant forming mechanisms.
Charles, Effect of Second-Phase Particles on the Mechanical Properties of Steel, M.
Online since: February 2011
Authors: B.H. Xu, Q.F. Liu, Y.Z. Sun, Shu Li Ding
It was shown that the particles of nano-kaolinite is very thin lamellar in shape, whose average thickness, average particle size, are 50 nm and 450 nm respectively.
1.Introduction
The thickness of kaolin platelike particles significantly affects their dispersibility, agglomeration and rheological properties, whenever kaolin is used as a coating, pigment or filler in paper, ceramics, rubber, or polymers (Murray and Kogel, 2005; Ding et al., 2009).
Several author teams examined the mechanochemical effects of grinding of kaolinite on its structure and thermal behavior and subsequent thermal transformationsor sorption properties (Suraj et al., 1997).
The similar conclusions can be concluded that particles, <0.1μm, were difficult to preparation by traditional mechanical grinding or stirring.
Sound cavitation, which produce enormous acceleration and the high-speed collision blow among particles in liquid, is the most important factor in kaolinite of ultrasonic power delamination.
Influence of mechanical grinding to structure and granularity of clay mineral.
Several author teams examined the mechanochemical effects of grinding of kaolinite on its structure and thermal behavior and subsequent thermal transformationsor sorption properties (Suraj et al., 1997).
The similar conclusions can be concluded that particles, <0.1μm, were difficult to preparation by traditional mechanical grinding or stirring.
Sound cavitation, which produce enormous acceleration and the high-speed collision blow among particles in liquid, is the most important factor in kaolinite of ultrasonic power delamination.
Influence of mechanical grinding to structure and granularity of clay mineral.
Online since: September 2015
Authors: Jiří Bydžovský, Tomáš Melichar, Ámos Dufka
When a concrete-steel construction is affected some elements may completely loose their bearing capacity resulting in possible collapse of the construction.
Trouble-free matrix-aggregates contact zone is one of the key factors for preservation of particular material parameters and thus whole construction bearing capacity.
Basic physical and mechanical characteristics were monitored in the age of 28, 45 and 90 days.
To obtain good workability of the fresh mixture with provision of sufficient physical and mechanical parameters was the objective.
The proposed formulas can be evaluated very positively when using the preparation of mixing matrix and combination of both aggregate types with application of support admixture and scattered reinforcement parameters exceeding properties of common maintenance materials were obtained.
Trouble-free matrix-aggregates contact zone is one of the key factors for preservation of particular material parameters and thus whole construction bearing capacity.
Basic physical and mechanical characteristics were monitored in the age of 28, 45 and 90 days.
To obtain good workability of the fresh mixture with provision of sufficient physical and mechanical parameters was the objective.
The proposed formulas can be evaluated very positively when using the preparation of mixing matrix and combination of both aggregate types with application of support admixture and scattered reinforcement parameters exceeding properties of common maintenance materials were obtained.
Online since: July 2013
Authors: Kunal B. Modi, Rajesh J. Tayade, T.K. Pathak, N.H. Vasoya, Thillai Sivakumar Natarajan
The molecular structure and chemical properties of nitrobenzene are given in Table 1.
This may due the various factors such as morphology, surface area, optical bandgap, and density of the ferrite system.
However, in following section we have tried to explain some of the factors affecting in the photocatalytic activity of the composites.
Modi, Infrared spectroscopy and elastic properties of nanocrystalline Mg-Mn ferrites prepared by co-precipitation technique, J.
Modi, Synthesis of nanostructured material by mechanical milling and study on structural property modifications in Ni0.5Zn0.5Fe2O4,Ceram.
This may due the various factors such as morphology, surface area, optical bandgap, and density of the ferrite system.
However, in following section we have tried to explain some of the factors affecting in the photocatalytic activity of the composites.
Modi, Infrared spectroscopy and elastic properties of nanocrystalline Mg-Mn ferrites prepared by co-precipitation technique, J.
Modi, Synthesis of nanostructured material by mechanical milling and study on structural property modifications in Ni0.5Zn0.5Fe2O4,Ceram.
Online since: October 2014
Authors: Yu Ming Ma, Lin Liu
System Properties
Hardware section of power distribution station computer monitoring system.
Unbalanced factor alarm: When the three-phase current or three-phase voltage transformation and distribution system imbalance (customizable range), the computer can automatically record the time, station number, loop through multimedia speakers sound alarm names
Resulting in system crash, software crash, system files are missing. ③Due to the different means of communication and surveillance systems used for event recording mode, the communication time is very important, it requires fast response aspects of surveillance systems have higher requirements. ④Interface capacity is not enough, the data of switch knife cannot be into the monitoring system so that intuitive wiring diagram is affected.
Beijing: Mechanical Industry Press, 2004; [3] Yang Yue.
Beijing: Mechanical Industry Press, 2003; [4]Zhang Wen-Liang,Tang Guang-Fu, Zha Kun-Peng etal.
Unbalanced factor alarm: When the three-phase current or three-phase voltage transformation and distribution system imbalance (customizable range), the computer can automatically record the time, station number, loop through multimedia speakers sound alarm names
Resulting in system crash, software crash, system files are missing. ③Due to the different means of communication and surveillance systems used for event recording mode, the communication time is very important, it requires fast response aspects of surveillance systems have higher requirements. ④Interface capacity is not enough, the data of switch knife cannot be into the monitoring system so that intuitive wiring diagram is affected.
Beijing: Mechanical Industry Press, 2004; [3] Yang Yue.
Beijing: Mechanical Industry Press, 2003; [4]Zhang Wen-Liang,Tang Guang-Fu, Zha Kun-Peng etal.
Online since: August 2018
Authors: Nurul Aimi Ghazali, Arina Sauki, Noor Fitrah Abu Bakar, Siti Humaira Naqiah Azmi, Wan Asma Wan Ibrahim
One of the factors is high initial cost of OBM, especially when it comes to formulate drilling fluid based on synthetic or mineral oil [1].
Effects of Ligni n on Mud Rheology and Filtration Properties at Different Temperatures Table 3 shows the properties of lignin-mud at different temperatures.
The pH of lignin did not significantly affect the PV values of the mud since the PV values were about the same with commercial lignin properties.
Another mud properties that can be compared was HTHP filtrate volume.
S., American Society of Mechanical Engineers.
Effects of Ligni n on Mud Rheology and Filtration Properties at Different Temperatures Table 3 shows the properties of lignin-mud at different temperatures.
The pH of lignin did not significantly affect the PV values of the mud since the PV values were about the same with commercial lignin properties.
Another mud properties that can be compared was HTHP filtrate volume.
S., American Society of Mechanical Engineers.
Online since: August 2010
Authors: Cai Liang Huang, X. Chen, Zhe Zhang, Fu You Xu
Inclined angle is one determinative factor for cable sag and
nonlinearity, thus the displacement, stress and frequency of cable will be affected [9].
Inclined angle affect in-plane frequencies more.
Initial stress affects frequencies of long cable greater.
Property of Nonlinear Parametric Vibration of CFRP Cables [J].China Journal of Highway and Transport, (2007), 20(1):41~48
Analysis of dynamic properties for CFRP stayed cables [J].Journal of Harbin Institute of Technology, (2008), 8:47~50
Inclined angle affect in-plane frequencies more.
Initial stress affects frequencies of long cable greater.
Property of Nonlinear Parametric Vibration of CFRP Cables [J].China Journal of Highway and Transport, (2007), 20(1):41~48
Analysis of dynamic properties for CFRP stayed cables [J].Journal of Harbin Institute of Technology, (2008), 8:47~50
Online since: October 2011
Authors: Mostafa Tazimi, S. Sobhan Nabavi, Seyyed Mohammad Javadi
Finally results indicate that the most influencing factor over these chemical reactions and CH4 and H2S conversions is reactor temperature.
Carbon black is widely used as filler in elastomers, tires, plastics and paints to modify the mechanical, electrical and optical properties of materials in which it is used [8], [9].As the prices of fossil fuel natural gas resources become important alternatives to replace increasingly exhausted reserves of high quality natural gases for the production of hydrogen and carbon black [2], [10].
Results show that the major factor influencing CH4 and H2S conversions is temperature.
Based on the presented results, the following conclusions may be drawn: The major factor influencing CH4 and H2S conversions is reactor temperature.
Since CH4 conversion occurs at lower temperatures compared with H2S conversion, the reactor temperature is significantly affected by the amount of CH4.
Carbon black is widely used as filler in elastomers, tires, plastics and paints to modify the mechanical, electrical and optical properties of materials in which it is used [8], [9].As the prices of fossil fuel natural gas resources become important alternatives to replace increasingly exhausted reserves of high quality natural gases for the production of hydrogen and carbon black [2], [10].
Results show that the major factor influencing CH4 and H2S conversions is temperature.
Based on the presented results, the following conclusions may be drawn: The major factor influencing CH4 and H2S conversions is reactor temperature.
Since CH4 conversion occurs at lower temperatures compared with H2S conversion, the reactor temperature is significantly affected by the amount of CH4.
Online since: October 2014
Authors: Zambri Harun, Wan Mohd Faizal Wan Mahmood, Lok Bee Seng, Muhammad Ahmar Zuber, Zulkhairi Zainol Abidin
Interpolation Techniques in Computational Particle Tracking Inside a Direct-Injection Diesel Engine Cylinder
Lok Bee Seng1,a, Muhammad AhmarZuber1,b,
Wan Mohd Faizal Wan Mahmood1,2,c, Zulkhairi Zainol Abidin1,2,d
and Zambri Harun1,2,e
1Department of Mechanical and Materials Engineering, Faculty of Engineering and Built
Environment, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia
2Centre for Automotive Research, Faculty of Engineering and Built Environment,
Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia
abichen1989@hotmail.com, bahmarzuber@yahoo.com, cwmfaizal@eng.ukm.my,
dzza@eng.ukm.my, ezambri@eng.ukm.my
Keywords: Soot, particle tracking, interpolation, trilinear, radial basis function.
Movement of soot particles are examined through the selection factors of particle's initial coordinate (r,Ɵ,z) and soot concentration level at different instant crack angle.
It has been used widely nowadays in automotive field since it has a better fuel efficiency property compared to gasoline engine but it has drawback such as the formation of soot and other pollutants [1].
It happens since interpolation technique computes its result which is affected by the parameter value on the previous time-step where RBF and trilinear interpolation takes on the different value on the related parameter.
By knowing the properties and movement tendency of soot particles, solution to minimize or even control the tendency of soot particles to stick on cylinder wall will have a higher successful probability.
Movement of soot particles are examined through the selection factors of particle's initial coordinate (r,Ɵ,z) and soot concentration level at different instant crack angle.
It has been used widely nowadays in automotive field since it has a better fuel efficiency property compared to gasoline engine but it has drawback such as the formation of soot and other pollutants [1].
It happens since interpolation technique computes its result which is affected by the parameter value on the previous time-step where RBF and trilinear interpolation takes on the different value on the related parameter.
By knowing the properties and movement tendency of soot particles, solution to minimize or even control the tendency of soot particles to stick on cylinder wall will have a higher successful probability.
Online since: May 2014
Authors: Tie Qiang Gang, Zhi Qiang Zhang, Yi Kai Yi
For the tools with coating materials of TiAlN, Al2O3, TiN, TiC, we can calculate the wear rate according to the Usui mathematical model of tool wear, and then consider thickness factor of TiC coating.
And the coating thickness affects the performance of heat insulation and bonding strength between coating and matrix directly.
The associated physical properties of the coating materials are listed in Table 1.
Physical properties of the coating materials Material Density [g/cm³] Melting Point [°C] Hardness [GPa] Elastic Modulus [GPa] Thermal Conductivity [W/m·K] Thermal Expansion [10-6/°C-1] TiAlN 4.5 2980 32.5 420 0.2604 4.8 Al2O3 3.9 2050 23 530 0.3024 8 TiN 5.2 2950 21 260 0.294 9.3 TiC 4.9 3150 32 500 0.1961 7.7 In AdvantEdge models, we set the tool’s rake angle of 5°, clearance angle of 10°, corner radius of 0.02 mm, and the corresponding cutting parameters are listed in Table 2.
Effect of TiC coatIng Thickness TiC coating exhibits high hardness and resistance to mechanical and abrasive wears.
And the coating thickness affects the performance of heat insulation and bonding strength between coating and matrix directly.
The associated physical properties of the coating materials are listed in Table 1.
Physical properties of the coating materials Material Density [g/cm³] Melting Point [°C] Hardness [GPa] Elastic Modulus [GPa] Thermal Conductivity [W/m·K] Thermal Expansion [10-6/°C-1] TiAlN 4.5 2980 32.5 420 0.2604 4.8 Al2O3 3.9 2050 23 530 0.3024 8 TiN 5.2 2950 21 260 0.294 9.3 TiC 4.9 3150 32 500 0.1961 7.7 In AdvantEdge models, we set the tool’s rake angle of 5°, clearance angle of 10°, corner radius of 0.02 mm, and the corresponding cutting parameters are listed in Table 2.
Effect of TiC coatIng Thickness TiC coating exhibits high hardness and resistance to mechanical and abrasive wears.