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Online since: May 2025
Authors: Ojo S. I. Fayomi, Ugbede W. Abuh
Row number one is for the development of the control sample.
The Rockwell hardness number of the samples was then evaluated using ASTM E18 standards.
Vafaeian, Influence of grain refinement on the electrochemical behaviour of AISI 430 ferritic stainless steel in an alkaline solution.
The Rockwell hardness number of the samples was then evaluated using ASTM E18 standards.
Vafaeian, Influence of grain refinement on the electrochemical behaviour of AISI 430 ferritic stainless steel in an alkaline solution.
Online since: August 2013
Authors: Shi Gang Xin, Qing Huang, Cui Tian Guo
So far a number of reports are mainly about the nickel plating on AZ series magnesium alloy and little information has been reported on ME20M magnesium alloy[3,13,14].
It can be attributed to the rare earth element in the ME20M magnesium alloys, which decreases the size of grains and increases the strength of magnesium alloys.
The diameter of bigger nodular structure was 10 mm, which is composed of a number of smaller granules.
It can be attributed to the rare earth element in the ME20M magnesium alloys, which decreases the size of grains and increases the strength of magnesium alloys.
The diameter of bigger nodular structure was 10 mm, which is composed of a number of smaller granules.
Online since: January 2013
Authors: Hui Li, Hai Hong Fan, Jin He Fan
Although researchers to bubbling fluidized bed flow characteristics inside the large number of experiments and numerical simulation, but because the gas solid two phase flow of complexity, the flow characteristics inside the fluidized bed research remains to be in the further.
Gas distributor is a plate with a certain number of holes.
In the static bed height is 300mm, due to bubbles not closed, the bubbles left no grain, there is no analysis on the left of bubble particle.
Gas distributor is a plate with a certain number of holes.
In the static bed height is 300mm, due to bubbles not closed, the bubbles left no grain, there is no analysis on the left of bubble particle.
Online since: November 2025
Authors: Jana Sobotová, Ludmila Džuberová
This phenomenon is also reflected in the observed microstructure: a more robust Si-network and a greater number of observable precipitates within the network
The observed microstructure features a finer silicon network with a smaller number of precipitates within individual grains with minor failures in the Si-network, where it is not completely compact, as compared to the as-built or T170 state.
The observed microstructure features a finer silicon network with a smaller number of precipitates within individual grains with minor failures in the Si-network, where it is not completely compact, as compared to the as-built or T170 state.
Online since: October 2013
Authors: Xue Hong Liao, Wan Qing Xiong, Quan Xin Zhu, Jian Lei, Wen Xiang Ye
Meanwhile photogenerated electrons and holes respectively from conduction band and valence band can also be captured by impurity energy levels and separating the electrons and holes, which lead to a decreasing of rate of their recombination, increase the lifetime of carriers and increase the number of carriers in per unit time and per unit volume.
This may be due to that when the doping amount is less than the optimum amount, with the increase of dopant concentration, the number of the doped ion trap provides increased, enhance the inhibition ability of electron/hole recombination and the photocatalytic performance improves.
The samples of 0.2% Ce and 0.5% Fe doped TiO2 sintered at 500oC for 2 h, XRD patterns show that the crystal is anatase and SEM pictures show the morphology is small grain of porous spherical structure.
This may be due to that when the doping amount is less than the optimum amount, with the increase of dopant concentration, the number of the doped ion trap provides increased, enhance the inhibition ability of electron/hole recombination and the photocatalytic performance improves.
The samples of 0.2% Ce and 0.5% Fe doped TiO2 sintered at 500oC for 2 h, XRD patterns show that the crystal is anatase and SEM pictures show the morphology is small grain of porous spherical structure.
Online since: June 2019
Authors: Sergey Sidelnikov, Roman Galiev, Vladimir Ber, Ruslan Sokolov, Vadim Bespalov, Anton Samchuk, Yuriy Gorbunov, D. Voroshilov
Despite the large number of works devoted to the study of the properties and machining technologies of alloys Al-Mg system [3-13], obtaining longish deformed semi-finished products from these alloys is an urgent task for production.
The following data chosen as the initial data and boundary conditions for modeling: the material of the workpiece is an aluminum alloy, the material of the instrument is tool steel; billet material isotropic; the conditions of contact interaction between the workpiece and the rolls were accepted according to the Siebel law with the friction index at the metal deformation in the rolls ψr = 0.9 and on the die ψd = 0.3; friction on the contact of the rolls and the die were not taken into account; relative reduction during rolling 50 %; the initial temperature of the workpiece Tb = 400-550°C, heat exchange with the environment and the tool; the initial temperature of the die (Td) and of the rolls (Tr) varied from 100 to 200°C, and heat exchange with the environment and the workpiece takes place; the number of finite elements into which the workpiece is divided was 32 thousand pieces.
Zhang, The effect of grain boundary character evolution on the intergranular corrosion behavior of advanced Al-Mg-3wt%Zn alloy with Mg variation.
The following data chosen as the initial data and boundary conditions for modeling: the material of the workpiece is an aluminum alloy, the material of the instrument is tool steel; billet material isotropic; the conditions of contact interaction between the workpiece and the rolls were accepted according to the Siebel law with the friction index at the metal deformation in the rolls ψr = 0.9 and on the die ψd = 0.3; friction on the contact of the rolls and the die were not taken into account; relative reduction during rolling 50 %; the initial temperature of the workpiece Tb = 400-550°C, heat exchange with the environment and the tool; the initial temperature of the die (Td) and of the rolls (Tr) varied from 100 to 200°C, and heat exchange with the environment and the workpiece takes place; the number of finite elements into which the workpiece is divided was 32 thousand pieces.
Zhang, The effect of grain boundary character evolution on the intergranular corrosion behavior of advanced Al-Mg-3wt%Zn alloy with Mg variation.
Online since: December 2016
Authors: Pavel Liška, Barbora Nečasová, Jakub Kelar
Density of spruce C22 was approximately 410.0 kg·m-3 and tensile strength parallel to the grain, which exactly was tested here, was approximately 13.0 MPa.
Adhesive system Mark (Fig. 3) Surface treatment Number of test samples [pc.]
The maximum shear strength of the adhesive system stated by each manufacturer is marked by number 0.
Adhesive system Mark (Fig. 3) Surface treatment Number of test samples [pc.]
The maximum shear strength of the adhesive system stated by each manufacturer is marked by number 0.
Online since: April 2020
Authors: Manh Truong Nguyen, Huu Thanh Nguyen, Huu Hue Nguyen
Smooth filler (stone powder) is put into mixed materials with the purpose of adding fine-grained content to aggregate to create aggregate with continuous particle composition with small pore ratio, surface ratio of aggregate reasonably reduces bitumen consumption while still ensuring the required viscosity, with a certain bitumen content, when the proportion of the components of the aggregate is optimal, the composite material will have optimum viscosity. [4, 5, 10].
The selected planning model is the second nonlinear statistical model; the two optimal levels have the following form: Y = bo + b1x1 + b2x2 + b12x1x2 + b11x12 + b22x22 (1) Experimental number: N = 2n + 2n + No = 22 + 2x2 + 1 = 9.
- Number of samples needed: for each scenario experiment with pairs of stone size and corresponding viscosity required at least 3 samples, total 13 x 3 = 39 samples.
The selected planning model is the second nonlinear statistical model; the two optimal levels have the following form: Y = bo + b1x1 + b2x2 + b12x1x2 + b11x12 + b22x22 (1) Experimental number: N = 2n + 2n + No = 22 + 2x2 + 1 = 9.
- Number of samples needed: for each scenario experiment with pairs of stone size and corresponding viscosity required at least 3 samples, total 13 x 3 = 39 samples.
Online since: January 2022
Authors: Karim Touati, Malo Le Guern, Mohamed Boutouil, Nassim Sebaibi, Moussa Gomina, Steve Goodhew, Hasna Louahlia, François Streiff, Athmane Azil
Particle size analysis was performed by mechanical sieving up to 80µm according to the standard XP P94-041 and by laser grain size for particles under 80µm following the standard ISO 13320.
Lifts Specimens number Fibre content (%) Lift 2 3 3.7 ± 0.2 Lift 3 3 2.1 ± 0.2 Lift 4 3 2.3 ± 0.1 Tab. 2: Fibre content measured in laboratory 3.2 Water content in cob mix and walls According to the water contents measured in three cylindrical and three prismatic specimens of three lifts, there is not a significant variation in the water content, with the range of 18.4 % to 21.9 % (Fig.10).
ρ dry (kg/m3) Sepecimens number Cylindrical Prismatic Lift 2 3 1715 ± 11 1660 ± 19 Lift 3 3 1763 ± 22 1762 ± 13 Lift 4 3 1776 ± 44 1873 ± 11 Tab. 3: Dry density of cylindrical and prismatic specimens The variation of dry density shown in Fig.12 is ranging between 1660 and 1873 kg/m3 in (3) lifts.
Lifts Specimens number Fibre content (%) Lift 2 3 3.7 ± 0.2 Lift 3 3 2.1 ± 0.2 Lift 4 3 2.3 ± 0.1 Tab. 2: Fibre content measured in laboratory 3.2 Water content in cob mix and walls According to the water contents measured in three cylindrical and three prismatic specimens of three lifts, there is not a significant variation in the water content, with the range of 18.4 % to 21.9 % (Fig.10).
ρ dry (kg/m3) Sepecimens number Cylindrical Prismatic Lift 2 3 1715 ± 11 1660 ± 19 Lift 3 3 1763 ± 22 1762 ± 13 Lift 4 3 1776 ± 44 1873 ± 11 Tab. 3: Dry density of cylindrical and prismatic specimens The variation of dry density shown in Fig.12 is ranging between 1660 and 1873 kg/m3 in (3) lifts.
Online since: July 2020
Authors: Xi Wu Li, Kai Wen, Hong Lei Liu, Bai Qing Xiong, Xin Yu Lv, Ya Nan Li, Yong An Zhang, Zhi Hui Li, Hong Wei Yan
The total number of measured points was 21.
The total number of brick elements was 10000.
During the X-ray diffraction process, there exists large surface grains and texture orientation according to the diffraction information, which have significant influence on the measurement results.
The total number of brick elements was 10000.
During the X-ray diffraction process, there exists large surface grains and texture orientation according to the diffraction information, which have significant influence on the measurement results.