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Online since: July 2015
Authors: Wojciech Homik, Zbigniew Matuszak, Barbara Ciecińska
It is possible the laser alloying, densification, porosity removal, homogenization, fine-grained structure making, smoothing, hardening, tempering annealing, etc. [4-7].
On the specimens test surfaces number: 2, 4, 6 irrespective of option, were covered by corrosion directly after the treatment.
On the specimens test surfaces number: 2, 4, 6 irrespective of option, were covered by corrosion directly after the treatment.
Online since: April 2015
Authors: Tjipto Sujitno, Harun Nur Rosyid, Aris Widyo Nugroho
It is well known that the precipitation of the chemical compound phases on the grain boundaries leads to forming precipitation hardening effect.
At this temperature the chromium atom difussivity can start to be more significant and the number of localized CrN and CrC precipitation phenomena or called as sensitization phenomena may occur resulting in decrease in corrosion resistance.
At this temperature the chromium atom difussivity can start to be more significant and the number of localized CrN and CrC precipitation phenomena or called as sensitization phenomena may occur resulting in decrease in corrosion resistance.
Online since: December 2014
Authors: Hui Wang, Ping An Liu, Ling Ke Zeng, Yan Chun Liu, Wen Cheng Zhu, Xiao Su Cheng, Qian Ying Liang
Table 1 Technical indexes of raw materials
Raw materials
Particle size(nm)
Specific surface area(m2/g)
TiO2
30
-
TiO2
40
-
TiO2
50
-
TiO2
60
-
Ordinary carbon black
-
58.664
acetylene carbon black
-
138.921
Table 2 Prescription of synthesizing TiC
number
formula
1
TiO2 (30 nm)
Ordinary carbon black
2
TiO2 (40 nm)
Ordinary carbon black
3
TiO2 (50 nm)
Ordinary carbon black
4
TiO2 (60 nm)
Ordinary carbon black
5
TiO2 (30 nm)
acetylene carbon black
6
TiO2 (40 nm)
acetylene carbon black
7
TiO2 (50 nm)
acetylene carbon black
8
TiO2 (60 nm)
acetylene carbon black
The preparation process
Synthesis conditions: nano powders were synthesized viathe continuous synthesis furnace which has the independent intellectual property rights at the synthesis temperature range between 1100℃, 1200℃, 1300℃ and1400℃.
Measurements The purity and the grain size of the synthesized nano powders were characterized by the neo-confucianism D/Max-III full-automatic X diffractometer (Japan), and the neo-confucianism D/Max-1200 tape automatic X-ray diffractometer (Japan), respectively.
Measurements The purity and the grain size of the synthesized nano powders were characterized by the neo-confucianism D/Max-III full-automatic X diffractometer (Japan), and the neo-confucianism D/Max-1200 tape automatic X-ray diffractometer (Japan), respectively.
Online since: March 2015
Authors: Hai Lang Liu, Yi Ping Huang, Hang Li, Hai Hua Yu, Li Wan, Jun Wei Duan, Rui Bin Zhang
Therefore, when the grid is divided in the scanning area and its vicinity were regional breakdown, but far away from the region where the grid can draw too thick, which can significantly reduce the number of units, saving computing time.
After heating, cooling system make the workpiece temperature drop rapidly,which make the surface of the metal grains did not grow up, which can get a uniform dense surface structure.
After heating, cooling system make the workpiece temperature drop rapidly,which make the surface of the metal grains did not grow up, which can get a uniform dense surface structure.
Online since: August 2023
Authors: Philippe Garnier, Clement Sart, Emilie Prevost, Jerome Dubois, Benjamin Vianne
Although experimentally many occurrences of pillar-to-pillar collapse have been observed, other modes were also present in significant numbers, indicating a strong sensitivity of the pattern collapse to slight process variabilities.
Mielniczuk, Rupture of an evaporating liquid bridge between two grains, Acta Geophysica 62(5), https://doi.org/10.2478/s11600-014-0225-6
Mielniczuk, Rupture of an evaporating liquid bridge between two grains, Acta Geophysica 62(5), https://doi.org/10.2478/s11600-014-0225-6
Online since: May 2024
Authors: Hassane Mes-Adi, Hanae Chabba, Meryem Taoufiki, Abderrahim Barroug, Ahmed Jouaiti
Both scientific and industrial research pursuits are dedicated to the precise and comprehensive modulation of microstructural attributes (density, imperfections, grain dimensions, surface texture, crystal alignment, and an array of additional parameters).
The NPT (isothermal-isobaric) ensemble, i.e., the number of atoms N, the pressure of the system P, and the temperature T are held constant.
Furthermore, microstructural effects, including grain boundaries or defects within the material, contribute to the distribution of stresses within the Al structure, leading to diverse responses in distinct directions. 2.2.
The underlying algorithm involves determining the number of particles inside the spatial interval r to r+Δr.
The number of Fcc structures starts to decrease and continues this trend until the deformation reaches 0.174.
The NPT (isothermal-isobaric) ensemble, i.e., the number of atoms N, the pressure of the system P, and the temperature T are held constant.
Furthermore, microstructural effects, including grain boundaries or defects within the material, contribute to the distribution of stresses within the Al structure, leading to diverse responses in distinct directions. 2.2.
The underlying algorithm involves determining the number of particles inside the spatial interval r to r+Δr.
The number of Fcc structures starts to decrease and continues this trend until the deformation reaches 0.174.
Online since: January 2015
Authors: Vera Murgul, Nikolay Vatin, Radmila Sinđić Grebović, Željka Radovanović, Sretena Dimovska, Nina Serdar
The largest number of damages from the earthquake was registered in the buildings built of stone and clay brick blocks.
In the period 1990-2000, because of the wars in the region and the imposed economic sanctions, a large number of individual objects are built of concrete block or clay brick block, that do not have the minimum required compressive strength.
After the earthquake of 1979, the large number of stone masonry buildings was repaired.
In the case of strong earthquakes, it can be expected that the largest number of human casualties and damages will be registered in the buildings with masonry structure.
The testing of aggregates consisted of determining: granulometric composition, fineness modulus (M) and the density of the saturated surface of dry grains (γzz).
In the period 1990-2000, because of the wars in the region and the imposed economic sanctions, a large number of individual objects are built of concrete block or clay brick block, that do not have the minimum required compressive strength.
After the earthquake of 1979, the large number of stone masonry buildings was repaired.
In the case of strong earthquakes, it can be expected that the largest number of human casualties and damages will be registered in the buildings with masonry structure.
The testing of aggregates consisted of determining: granulometric composition, fineness modulus (M) and the density of the saturated surface of dry grains (γzz).
Online since: September 2019
Authors: Riad Badji, Nabil Bensaid, Mohamed Farid Benlamnouar, Mohamed Hadji, Yazid Laib Dit Laksir, Tahar Saadi, Sabah Senouci
Welding process is a multi-field technique mobilizing a great number of electric, thermal and thermo-mechanical phenomena.
These methods are a powerful tool that uses a special design to study the parameter space with small number of experiments through orthogonal arrays [12-13].
In this research larger-the-better is chosen, which can be calculated as following equation: (Eq. 1) Where S/N are the signal-to-noise ratio, n is the number of repetitions for an experimental combination, and a performance value of the kth experiment.
The number of experiments required can be tiny room to 9.
Rolled microstructure of X70 base material is composed of polygonal ferrite α (white color) and pearlite P (black color), containing about 75% ferrite with a range of ferrite grain sizes between 4 to 8µm. 304L austenitic stainless steel composed mainly of austenitic phase γ (about average diameter of 22µm) with a small amount of dispersed carbide particles and precipitated phases in austenite grain boundary.
These methods are a powerful tool that uses a special design to study the parameter space with small number of experiments through orthogonal arrays [12-13].
In this research larger-the-better is chosen, which can be calculated as following equation: (Eq. 1) Where S/N are the signal-to-noise ratio, n is the number of repetitions for an experimental combination, and a performance value of the kth experiment.
The number of experiments required can be tiny room to 9.
Rolled microstructure of X70 base material is composed of polygonal ferrite α (white color) and pearlite P (black color), containing about 75% ferrite with a range of ferrite grain sizes between 4 to 8µm. 304L austenitic stainless steel composed mainly of austenitic phase γ (about average diameter of 22µm) with a small amount of dispersed carbide particles and precipitated phases in austenite grain boundary.