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Online since: March 2009
Authors: Masumi Saka, Hironori Tohmyoh, M. Muraoka, Yang Ju, K. Sasagawa
Finally, regarding evaluation of mechanical and electrical properties of the micro/nanomaterials, the concentrated-mass cantilever technique in atomic force acoustic microscopy and the four-point atomic force microscope technique are shown to be powerful tools, respectively.
Excellent properties of carbon nanotube such as mechanical, electrical, optical and thermal properties are expected to be used in many fields of applications.
Finally, the special techniques based on atomic force microscopy (AFM) for evaluating the electrical [11] and mechanical properties of MNMs [12] are reported.
However, in the actual situation, it is not an easy task to determine the temperature of atoms in advance because the temperature of atoms is affected by a number of factors such as the current density, substrate temperature and the geometry of the slit.
Moreover, new techniques based on atomic force microscopy are powerful tools in evaluation of electrical and mechanical properties of micro/nanomaterials.
Online since: November 2021
Authors: Nitin Ambhore, Dinesh Kamble, Devendra Agrawal
The process having unique advantages like material properties remains unchanged, development of heat affected zone and stresses are eliminated as occurred in laser machining and stamping process, low tool as well as tool changing cost, capability of machining variety of materials with complex profile.
The findings are used for the manufacturing of micromesh used in fire alarms due to superior properties of SS-430 as mesh material. 2.
SS-430 is having wide applications due to high corrosion resistance, biocompatibility, better mechanical properties, a wide range of applications and compatibility with photochemical machining process.
GRA system is used to represent the grade of correlation between two sequences so that the distance of two factors can be measured discretely.
L27 orthogonal array considers all possible combination for three factors and three levels during experimentation.
Online since: September 2011
Authors: Ji Jie Zeng, An Hui Cai, Xiao Song Li
Different processing liquid for processing, the depth of residual stress generated is much the same, but closer to the surface, the worse the cooling capacity (quench degrees) and surface physical properties of processing fluids, the greater the residual stress.
In this paper, Under different processing conditions, the distribution of EDM surface residual stress often used by cold-working die steel (Cr12MoV)during mold manufacturing is investigated and the influence factors and causes is analyzed, and proposed measures to reduce the residual stress.
In summary, the distribution of residual stress is not solely determined by the discharge energy put into between the electrodes, when the discharge current peaks and the combination of pulse width is not the same, discharge current peak value will affect the surface residual stress, and pulse width will affect the depth of distribution of the stress.
After two kinds of processing liquid processing of the reason why there are differences between the residual stress distribution is due to the different cooling capacity (quench degrees) and surface physical properties.
(3) Different processing fluids for EDM, the depth of residual stress generated is much the same, but closer to the surface, the worse the cooling capacity (quench degrees) and surface physical properties of processing fluids, the greater the residual stress
Online since: September 2012
Authors: Ji Xiang Luo
It is the matrix-inclusion interfacial damage and the matrix crack propagation damage that resulted in the poor properties above.
It is concluded that number of inclusions has much affect on the tension strength, and the fewer the inclusions is, the more strength the model has.
Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing, 1993, A172(1-2): 63~69 [4] Llorca J.
,Gonzalaez C.Microstructural factors controlling the strength and ductility of fiber-reinforced metal-matrix composites.
The influence of fiber distribution on the mechanical response of a particulate metal matrix composites.
Online since: July 2019
Authors: Vesselin Nikolov, Vanya Zaharieva, Peter Petrov, Maria P. Nikolova, Emil H. Yankov, Stefan Valkov
The results indicate the suitability of both mild and severe EtO sterilization methods for improvement of the desired physicochemical properties of gradient TiN/TiO2 coatings.
The process affects some physicochemical properties of biomaterials such as surface chemistry, energy, and wettability that are proved to play important roles in bio-recognition and acceptance by the surrounding tissue [8].
The concentrations (in at%) of the observed chemical elements were calculated by normalizing the areas of the corresponding photoelectron peaks to their relative sensitivity factors.
Mainil-Varlet, Effect of thermal treatment on sterility, molecular and mechanical properties of various polylactides. 2.
Prociow, Structural and surface properties of TiO2 thin films doped with neodymium deposited by reactive magnetron sputtering, Materials Science-Poland, 31(1) (2013) 71-79
Online since: May 2023
Authors: Fauzilah Ismail, Ainie Abdul Shukor, Niraku Rosmawati Ahmad, Ahmad Kamil Arshad, Faizah Kamarudin
There are various factors which will affect the pattern details of cracks and the crack propagation kinetics.
These factors are the composition of the desiccating material, temperature, humidity, layer thickness and field effect like drying rate, mechanical properties and substrate [4].
Basic Properties Test.
The kaolin clay properties summarised in Table 1.
Table 1 Kaolin clay properties.
Online since: October 2007
Authors: Chao Ying Xie, Hong Jiang
One of the factors that affect grain refinement in ECAE is the temperature of the billet in which deformation and recrystallization take place [2].
The coupling between the heat transfer problem and the mechanical problem was due to the temperature-dependent material properties and the internal heat generated.
The thermophysical properties of CP-Ti and H13 at four different pressing temperatures are listed in Table 1.
emissivity of 0.63.The thermophysical properties of CP-Ti used in the simulations are listed in table1.
The thermophysical properties of CP-Ti used in the simulations Temperature Thermal expansion Specific heat Thermal conductivity (°C) (10-6°C-1) (J/kg.
Online since: April 2019
Authors: Justus Uchenna Anaele, Anthony Nnamdi Nnodum, Gaius Chukwuka Nzebuka, Chijioke Peter Egole
Lee and Kuo [12], studied the microstructural and mechanical properties in alloy 690 weldments.
Iwuoha [15], studied the influence of electrode coating on mechanical properties of structural steels.
Therefore, there is need to determine how the electrode covering affects the overall mechanical properties of ASS weldments.
Raj, (2002): Determination of Gradients in Mechanical Properties of 2.25Cr-1Mo Weldments Using Shear-Punch Tests.
Kuo, (1999): Microstructure and mechanical properties in alloy 690 weldments.
Online since: May 2014
Authors: Ai Ke Qiao, Zhan Zhu Zhang
Finite element method is widely used to study the factors that affect ISR and to improve stent designs to minimize ISR [2,3,5-11].
The material properties of the models are taken from the literature as shown in Table1 [12].
Fig. 1 Models of the artery and the stents Table 1 Material properties Composition Stent Artery Plaque Material Element Model of material Elasticmodulus (GPa) Poisson's ratio Yield strength (GPa) 304 stainless steel C3D8R Bilinearity, isotropy 193 0.27 0.207 Calcified plaque C3D4 Linearity, isotropy 0.00175 0.499 Calcified artery C3D4 Linearity, isotropy 0.00219 0.499 The stents are virtually deployed inside the artery using the commercial tool ABAQUS.
Moreover, the stent is implanted in the artery perpetually, so the service life of the stent is also affected by the structural mechanics.
A long-term mechanical effect of stent scaffolding would exist because of the existing of stent.
Online since: September 2011
Authors: Hua Bin Wen, Yu Lin Zhan, Hai Bo Liu
Though characterized with excellent mechanical properties and good durability, high strength concrete has poor ductility.
In practical engineering, mechanical properties of high strength concrete are often improved by adulterating fiber in concrete.
According to test results, the basic mechanical properties of steel materials are shown in table 1, basic mechanical properties of C80 concrete are shown in table 2.
In the process of internal force redistribution, the yield of the steel bar and the cracking of concrete are factors that affect the moving of the zero moment point.
Therefore, the steel bar is the main factor that affects the bearing capacity of the prestressed beam of high strength concrete - steel fiber concrete.
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