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Online since: July 2021
Authors: Sergey P. Bogdanov, Maxim М. Sychov, Nikolay A. Khristiuk, A.V. Anisimov
The tribotechnical properties of the obtained coatings on rollers - friction pairs are determined.
- Unloading the reactor, cleaning the surface of the plate from the mixture, analyzing the properties of the coating.
Oxide phases were also not identified, which indicates that the acidification of the surface is insignificant and does not affect its physical and mechanical properties.
Duh, Evaluation of microstructures and mechanical properties of chromized steels with different carbon content, Surface and Coatings Technology 177-178 (2004) 525-531
Lin, Tribological properties evaluation of AISI 1095 steel chromized at different temperatures, Surface and coatings technology 188-189 (2004) 550-555
- Unloading the reactor, cleaning the surface of the plate from the mixture, analyzing the properties of the coating.
Oxide phases were also not identified, which indicates that the acidification of the surface is insignificant and does not affect its physical and mechanical properties.
Duh, Evaluation of microstructures and mechanical properties of chromized steels with different carbon content, Surface and Coatings Technology 177-178 (2004) 525-531
Lin, Tribological properties evaluation of AISI 1095 steel chromized at different temperatures, Surface and coatings technology 188-189 (2004) 550-555
Online since: July 2014
Authors: Rong Jie Yang, Xian Quan Jiang, Ai Min Jiang, Jin Yang, Rong Yu
Because of the characteristics of both one dimensional nanostructure and excellent physical and chemical properties, the kinds of novel nanomaterials -tungsten carbide nanowires, have important academic significance and practical meaning.
The rapid intrinsic growth characteristic of nanometer WC grain during sintering process lead nano-grained cemented carbides with excellent mechanical performances is not acquired [10].
Fig.1(f) shows SEM images of the materials synthesized at 1200 °C starting from a mechanical mixture of WO3 and CNTs.
The needles are not grown on a flat substrate but only on a substrate with a curvature, so the curve radius of the substrate is a key factor that affects the nucleation of the WC needle.
Carbides Properties, Production, and Application., Plenum Press: New York, 1971
The rapid intrinsic growth characteristic of nanometer WC grain during sintering process lead nano-grained cemented carbides with excellent mechanical performances is not acquired [10].
Fig.1(f) shows SEM images of the materials synthesized at 1200 °C starting from a mechanical mixture of WO3 and CNTs.
The needles are not grown on a flat substrate but only on a substrate with a curvature, so the curve radius of the substrate is a key factor that affects the nucleation of the WC needle.
Carbides Properties, Production, and Application., Plenum Press: New York, 1971
Online since: August 2010
Authors: Hong You Li, Xiao Mei Liu, Qing Juan Zheng, Yi Jian Huang, Yu Ying Shi
Analysis of Fractional derivative model for MR Damping system
LIU Xiaomei a, HUANG Yijian b, LI Hongyou, ZHENG Qingjuan, SHI Yuying
College of Mechanical Engineering and Automation, Huaqiao University, Xiamen Fujian China
a
liuxm@hqu.edu.cn, byjhuang@hqu.edu.cn
Keywords: fractional derivative model; MR Fluid; MR damper; nonlinear system.
It is demonstrated that the controlling current affects the order of the fractional system significantly, the increasing of the currents lead to the increasing of systemic order, strengthen the influence of viscosity remarkably and weaken the influence of inertia simultaneously.
This concept results in fractional-order differential stress-strain relations, that provide good curve-fitting properties, require only few parameters and lead to causal behavior.
However, it is known that these models probably result poor curve-fitting properties unless enough parameters are considered.
In Eq(2.1),σdefines the stress and εis the strain; K is a proportionality factor; αis the order of derivative which commonly taken to range between 0 and 1.
It is demonstrated that the controlling current affects the order of the fractional system significantly, the increasing of the currents lead to the increasing of systemic order, strengthen the influence of viscosity remarkably and weaken the influence of inertia simultaneously.
This concept results in fractional-order differential stress-strain relations, that provide good curve-fitting properties, require only few parameters and lead to causal behavior.
However, it is known that these models probably result poor curve-fitting properties unless enough parameters are considered.
In Eq(2.1),σdefines the stress and εis the strain; K is a proportionality factor; αis the order of derivative which commonly taken to range between 0 and 1.
Online since: July 2022
Authors: Stefan Carosella, Peter Middendorf, Florian Helber
Geßler et al. [10] and Beier [11] have shown, that the tensile properties of a composite laminate are barely affected.
It has been shown, that bending properties were reduced by up to 15 % for all of the binder systems tested.
But beyond the mechanical performance losses, the utilization of tackifying agents also affects preform permeabilities.
Various factors such as the influence of solvent- and water-based release agents, tooling materials, tooling temperatures and consolidation forces were taken into consideration and their suitability for DFP processes was analyzed.
Middendorf, Dry Fibre Placement: The Influence of Process Parameters on Mechanical Laminate Properties and Infusion Behaviour, Polymers 2021, Vol. 13 (21), DOI: https://doi.org/10.3390/polym13213853, 2021
It has been shown, that bending properties were reduced by up to 15 % for all of the binder systems tested.
But beyond the mechanical performance losses, the utilization of tackifying agents also affects preform permeabilities.
Various factors such as the influence of solvent- and water-based release agents, tooling materials, tooling temperatures and consolidation forces were taken into consideration and their suitability for DFP processes was analyzed.
Middendorf, Dry Fibre Placement: The Influence of Process Parameters on Mechanical Laminate Properties and Infusion Behaviour, Polymers 2021, Vol. 13 (21), DOI: https://doi.org/10.3390/polym13213853, 2021
Online since: July 2010
Authors: Uwe Erb
In the early years of research on nanocrystalline structures, materials were often available only in
small quantities, insufficient to measure their mechanical properties by tensile testing.
At the same time the coefficient of friction dropped by a factor of 2.
This is more or less the same what is observed for nanocrystalline electroforms: the same properties are either not strongly affected by grain size or show considerable changes when the microstructure is refined.
It has been shown that several properties (e.g. the Young's modulus, thermal expansion and saturation magnetization) are not strongly affected by the presence of high concentrations of these defects.
Aust, in Processing and Properties of Nanocrystalline Materials, C.
At the same time the coefficient of friction dropped by a factor of 2.
This is more or less the same what is observed for nanocrystalline electroforms: the same properties are either not strongly affected by grain size or show considerable changes when the microstructure is refined.
It has been shown that several properties (e.g. the Young's modulus, thermal expansion and saturation magnetization) are not strongly affected by the presence of high concentrations of these defects.
Aust, in Processing and Properties of Nanocrystalline Materials, C.
Online since: June 2013
Authors: Zai Ji Zhan, Run Guo Zheng
Recent research results showed that the addition of non-metallic second phase particles such as oxides, borides and carbides could remarkably improve mechanical properties and wear resistance of metal matrix composites [1-4].
The wear of the composites was mainly affected by mechanical wear when the electrical current is low.
However, with the increase of the applied load, the mechanical wear of the composites increased according to Archard’s wear equation.
There could be an optimized load for a certain application in high speed sliding electrical contact because load was a factor related to both the electrical heating, frictional heat and abrasive wear.
Paulmier et al. [10] indicated that the passage of electrical current favors oxidation by increasing the surface temperature, and modified the mechanical properties of the oxides and substrate.
The wear of the composites was mainly affected by mechanical wear when the electrical current is low.
However, with the increase of the applied load, the mechanical wear of the composites increased according to Archard’s wear equation.
There could be an optimized load for a certain application in high speed sliding electrical contact because load was a factor related to both the electrical heating, frictional heat and abrasive wear.
Paulmier et al. [10] indicated that the passage of electrical current favors oxidation by increasing the surface temperature, and modified the mechanical properties of the oxides and substrate.
Online since: July 2014
Authors: Hai Ying Zhang, Yu Feng Shu
This translation agency’s installation is complicated, energy consumption, easy to wear, easy to affect accuracy.
A reasonable choice of wearing material Embedded PLC based control milling machine for the study, studied six different carbon and silicon content of the steel milling machine hardness, impact toughness , tensile strength, elongation and reduction of area , and analyze the friction and wear properties .
Author: Haiying Zhang, male, Birthday:1968.12, professor, Mechanical engineering teaching and researching Address: College of Electrical and Mechanical, DongGuan Polytechnic ,No.3 University Road ,Songshan Lake Sci.
Mechanical design [M] Beijing: Higher Education Press, 2005
Austempering temperature on the influence of microstructure and properties of low alloy wear-resistant steel [J].
A reasonable choice of wearing material Embedded PLC based control milling machine for the study, studied six different carbon and silicon content of the steel milling machine hardness, impact toughness , tensile strength, elongation and reduction of area , and analyze the friction and wear properties .
Author: Haiying Zhang, male, Birthday:1968.12, professor, Mechanical engineering teaching and researching Address: College of Electrical and Mechanical, DongGuan Polytechnic ,No.3 University Road ,Songshan Lake Sci.
Mechanical design [M] Beijing: Higher Education Press, 2005
Austempering temperature on the influence of microstructure and properties of low alloy wear-resistant steel [J].
Online since: May 2013
Authors: Satish Chinchanikar, A. P. Kulkarni, S. K. Choudhury
Kulkarni3, c
1Ph.D scholar, Mechanical Engineering Department, Indian Institute of Technology, Kanpur, India
2 Professor, Mechanical Engineering Department, Indian Institute of Technology, Kanpur, India
3 Associate professor, Mechanical Engineering Department, Vishwakarma Institute of Information Technology, Pune, India
asatish@iitk.ac.in, bchoudhry@iitk.ac.in, capk_31173@rediffmail.com
Keywords: Interface temperature, Tool-work thermocouple, hardened steel, Turning, Coated inserts.
Experimental observations indicate that the interface temperature is higher for harder work material and get affected mostly by cutting speed followed by feed.
Introduction Heat generated in machining operation is an important factor in addressing metal cutting issues like dimensional accuracy, surface integrity and tool life.
Interface temperature was observed to be more influenced by thermal properties of the workpiece and tool coating.
Brandao, Turning hardened steel using coated carbide at high cutting speeds, Journal of Brazilian Society of Mechanical Science and Engineering 30(2) (2008) 104-109
Experimental observations indicate that the interface temperature is higher for harder work material and get affected mostly by cutting speed followed by feed.
Introduction Heat generated in machining operation is an important factor in addressing metal cutting issues like dimensional accuracy, surface integrity and tool life.
Interface temperature was observed to be more influenced by thermal properties of the workpiece and tool coating.
Brandao, Turning hardened steel using coated carbide at high cutting speeds, Journal of Brazilian Society of Mechanical Science and Engineering 30(2) (2008) 104-109
Online since: February 2014
Authors: Yu Chen, Zhe Guo
And its adsorption properties of arsenic in aqueous solution were studied by static adsorption experiments.
Activated carbon has unique pore structure, abundant surface active functional groups, along with chemical stability, high mechanical strength, acid, alkali and heat resistance, insolubility in water and organic solvents, it is an excellent adsorbent.
So it is speculated that under the same concentration of impreganated Fe(Ⅲ) salt, the stronger the oxidation of Fe(Ⅲ) salt is, the larger improvement the surface chemical properties of activated carbon can obtain.
So the impregnatin time will affect the adsorption properties of adsorbent.
Fig.3 Effect of impregnation time on adsorption capacity Fig.4 Effect of curing temperature on adsorption capacity The effect of curing temperature on adsorption The loading of ferric oxide hydrate on activated carbon relys on the adsorption and transformation of Fe3+ , this two processes occur during the evaporation or chemical precipition of the cure, so curing temperature is one of the key factors that determine the adsorption properties of Fe-AC.
Activated carbon has unique pore structure, abundant surface active functional groups, along with chemical stability, high mechanical strength, acid, alkali and heat resistance, insolubility in water and organic solvents, it is an excellent adsorbent.
So it is speculated that under the same concentration of impreganated Fe(Ⅲ) salt, the stronger the oxidation of Fe(Ⅲ) salt is, the larger improvement the surface chemical properties of activated carbon can obtain.
So the impregnatin time will affect the adsorption properties of adsorbent.
Fig.3 Effect of impregnation time on adsorption capacity Fig.4 Effect of curing temperature on adsorption capacity The effect of curing temperature on adsorption The loading of ferric oxide hydrate on activated carbon relys on the adsorption and transformation of Fe3+ , this two processes occur during the evaporation or chemical precipition of the cure, so curing temperature is one of the key factors that determine the adsorption properties of Fe-AC.
Online since: August 2013
Authors: Pei Yu Zhang, Yan Li
The performances of CMUTs are strongly dependent on the geometrical properties of the single cells and their arrangement within each element as well.
Electrostatic interactions for 3-D coupled-field simulations are also performed to help investigate the electro-mechanical properties of the CMUTs.
Design and simulation The properties of CMUTs mainly rely on the geometrical profile of single elements as well the schemes within each cells.
Those above should result in CMUTs with good and stable properties.
E.Powers “A new imaging technique based on the nonlinear properties of tissues,” in Proc.
Electrostatic interactions for 3-D coupled-field simulations are also performed to help investigate the electro-mechanical properties of the CMUTs.
Design and simulation The properties of CMUTs mainly rely on the geometrical profile of single elements as well the schemes within each cells.
Those above should result in CMUTs with good and stable properties.
E.Powers “A new imaging technique based on the nonlinear properties of tissues,” in Proc.