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Online since: September 2013
Authors: Joseph E. Edeh, James Mzuaor Aburabul, Manasseh Joel
Test results show that the properties of RAP improved with GSA treatment.
The properties of RAP are largely dependent on the properties of the constituent materials and asphalt concrete type used in the old pavement.
Research has established typical range of particle size distribution, physical, chemical, engineering and mechanical properties of RAP [2,4,5].
Little, Evaluation of Structural Properties of Lime Stabilized Soils and Aggregates, Summary of Findings Prepared for National Lime Association, Vol. 1, 1999, 97 p
Osinubi, Influence of compaction delay on the properties of cement stabilized lateritic soil.
Online since: March 2021
Authors: Edward H. Jiménez Calderon, Marco Rosero, Magdalena Diaz
The physicochemical properties of natural Allophane were studied.
There are many studies on Allophane, its physical-chemical properties and its uses as a catalyst in oil refining. [7-9].
The factors that affect the surface area are the porosity, the size and geometric shape of the particle since the surface area increases when the particle size decreases.
Use Bragg's law to determine crystallographic properties.
The allophanes have similar properties to the zeolites, for which they have similar applications as absorbent and as catalyst.
Online since: July 2015
Authors: Andreas Bührig-Polaczek, David Joop, Simon Heupel, Christian Schnatterer, Daniela Zander
The corrosion properties were investigated by climatic corrosion tests (VDA 621-415) and immersion testing in 0.1M NaCl solution at a pH of 7.5.
Taking into account the linear regions of both diagrams, the combination AZ91 HP + EN AW 5083 showed superior corrosion properties in 0.1M NaCl solution in comparison to AM50 HP + EN AW 6082.
The predominant factor for the corrosion properties of these galvanic couplings is supposed to be the difference of standard potentials.
In contrast, the alternating tested coated segments of the standard-profile exhibited effective anticorrosive properties.
Superior corrosion properties of the AZ91 HP + EN AW 5083 combination were found, due to the higher Al and Mg contents in the cast and wrought alloys respectively, resulting in lower galvanic activity.
Online since: November 2017
Authors: Wei Min Chen, Juan Chen, Qin Li, Li Jun Zhang, Na Ta
Introduction Ni-based superalloys, mainly consisting of disordered face-centered cubic γ matrix phase (fcc_A1 structure) and ordered γ′ precipitate phase (fcc_L12 structure), usually possess excellent high-temperture mechanical properties and are thus widely used as ideal materials for highly loaded trubine blades in aero-engine and powder generation gas turbine.
Therefore, one of the key factors limiting the lifetime of TBCs lies on the interdiffusion between the bond-coat and the underlying Ni-based superalloy [10].
In this case, the thermodynamic factors and mobility parameters in the numerical inverse method are only treated as the numerical parameters without any physical meaning.
Those factors lead to the fact that the rate of Al atoms transferring to the interface is larger than that leaving the interface.
Jiang, Thermodynamic properties of the Al-Fe-Ni system acquired via a hybrid approach of calorimetry, first-principles and CALPHAD, Acta Mater. 57 (2009) 5324-5341
Online since: September 2013
Authors: A. Nirmala Grace, C. Santhosh, M. Saranya, S. Felix, V. Uma, N. Pradeep, R. Ramachandran
Other techniques like Raman spectroscopy and XRD were also employed to know the physico-chemical properties of the samples.
Introduction Carbon Nanotubes have been paid most attention among the research community because of its interesting and superior chemical, electronic, physical and mechanical properties.
Other techniques like Raman spectroscopy, XRD were also employed to know the physico-chemical properties of the samples.
In Carbon Nanotubes Properties and Applications, (ed.)
Advanced ceramics: Combustion synthesis and properties, Mater Sci. 16 (1993) 533
Online since: October 2010
Authors: An Du, Rui Na Ma, Yong Zhe Fan
The FATT50 (the fracture appearance transition temperature) of the rotors was predicted as a function of ratio of the two peak current densities (Ipr / Ip ) tested by electrochemical potentiodynamic reaction method, temperature of electrolyte, J-factor and grain size ( N ).
The peak current densities were affected by the grain size parameter N of the material and the temperature T at which the electrochemical polarization test was carried out.
Since all the input independent variables (Ipr / Ip ,T, J-factor and N) of the model obtained by BNN can be obtained by a nondestructive test or from the manufacture report of the steam turbine rotor, this model can be used as a nondestructive method to predict temper embrittlement of in-service turbine rotors.
The use of electrochemical and mechanical property correlations to monitor the degradation of Cr-Mo-V turbine casing steel.
Online since: November 2012
Authors: Bei Zhan Wang, Xiang Deng, Wei Chuan Ye, Hai Fang Wei
In addition, the continuous integer programming problem leads to a large number of redundant solution space with redundant search, thus affecting the convergence speed.
Similar method was used to solve the target assignment and multicast routing optimization problem [30], [31], [32].Integrated with workflow features, through the concept of replacement factor, defined workflow scheduling algorithm based on discrete particle swarm and the definiation is applied to rusk scheduling of workflow[33].
Novel Discrete Particle Swarm Optimization Based on Huge Value Penalty for Solving Engineering Problem [J], Chinese Journal of Mechanical Engineering. 2009, 22(3): 410-418
A hierarchical mamdani - type fuzzy modeling approach with new training data selection and multi - objective optimization mechanisma: A special application for the prediction of mechnical properties of alloy steels[J].
Research on Discrete Multi-objective Optimization Problem [J], MECHANICAL ENGINEERING & AUTOMATION. 2011, 5:206-208.
Online since: September 2017
Authors: I.A. Mustaeva, M.A. Golovnin, S.V. Danilov
Practical interest in texture is concerned to the fact that their presence leads to an anisotropy of physical properties [6, 7], strength and ductility [4, 8-11], as well as the tendency of the material destruction [12-14].
Formed texture in the material at a certain repartition, in the subsequent processing (annealing, deformation), through the mechanism of heredity [15], can materially affect on the orientation-dependent properties of the product.
The cause of texture formation is deformation under severe conditions, in consequence of sliding of dislocations over systems with the maximum Schmid factor [18].
Doroshenko, Investigation of the Effect of a Technology for Al-Mg-Si Alloy Flat Product Manufacture on Anisotropy of Properties, Technology of Light Alloys. 3 (2016) 69-74
Chen, Effects of Heat Treatment and Strain Rate on the Microstructure and Mechanical Properties of 6061 Al Alloy, Int.
Online since: July 2011
Authors: Qiang Liu, Zheng Ming Huang
Miller [4] proposed a yield surface that can be fitted to the plastic flow properties exhibiting plastic compressibility.
In the present paper, a factor of 0.01 with the modulus of the resin is used to deteriorate the stiffness of the failed lamina[13] (the choice of the degradation factor is presented in reference [13]).
Further on, the present study takes skin effect into account that varying geometrical parameters of face layer and core layer affect nonlinear response and ultimate strength of honeycomb sandwich composites.
Journal of Mechanical Physics Solids, Vol. 37(1989), p. 717–733 [2] Zhu H.X., Mills N.J.: The in-plane non-linear compression of regular honeycombs.
International Journal of Mechanical Sciences, Vol.42 (2000), p.729-754 [5] John W.
Online since: April 2013
Authors: Maria Founti, Anna Gazi, George Skevis
Finishing equipment includes two polishing machines that are used to adjust the product thickness to a prescribed tolerance and to give light reflecting properties to the marble surface.
The total score is based on the sum of individual scores given for each indicator, multiplied by a corrective weighting factor.
Each indicator is also multiplied by a corrective weighting factor, W1-W3, also shown in Table 3.
A low “sufficient” score has been assigned to the quarry impact ratio since a large part of the surrounding area is affected by the quarry operations.
Although the population density near the particular quarries is rather low, naturally there is no room for improvement in the corresponding weighting factor (W2) which affects four out of six indicators.
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