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Online since: November 2011
Authors: Jian Zhong Cui, Ke Qin, Hui Xue Jiang
Schematic diagrams of the casting process at (a) initial and (b) steady states
Table 1 Casting parameters of the composite ingot
Casting temperature
[℃{TTP}8451
]
Casting speed
[mm/min]
Water flow rate
[L/min]
3004 aluminun alloy695
4045 aluminun alloy:680
70
80
Table 2 Nominal composition of 3004 and 4045 alloys
Elements
Mn
Mg
Si
Fe
Al
3004 Wt%
4045 Wt%
1.5
0.05
1.2
0.05
0.3
10
0.7
0.8
Balanced
Balanced
To study the temperature field around the composite interface during the casting process, temperature in the interface and in the cooling plate was measured, measurement points in different positions are corresponded to thermal couples with different number.
It can be seen that in the 4045 alloy some needle-like primary silicon crystals (black part) are distributed at the boundaries of the coarse α-Al grains (white part); whereas in the 3004 alloy some manganese particles (black dots) are embedded in the α-Al matrix (white part).
It can be seen that in the 4045 alloy some needle-like primary silicon crystals (black part) are distributed at the boundaries of the coarse α-Al grains (white part); whereas in the 3004 alloy some manganese particles (black dots) are embedded in the α-Al matrix (white part).
Online since: April 2015
Authors: Anna G. Knyazeva, Alexsey Pobol, George Goranskyi, S.N. Sorokova
Therefore significantly reduces the possibility of the grain growth.
As the number of points of computational mesh of this axis is fixed at this step leads to the change and the need to consider the calculation grid deformations in equations (1) - (5).
As the number of points of computational mesh of this axis is fixed at this step leads to the change and the need to consider the calculation grid deformations in equations (1) - (5).
Online since: June 2013
Authors: Wei Juan Li, Sheng Li Li, Ji Guang Li, Dong Wang, Jun Liu, Tao Xu
Introduction
In the series of high temperature proton conductors, the CaZrO3-base doped Al3+, Ga3+, In3+ or Sc3+ ceramic materials have a good chemical stability and resistance to heat shocks [1],as well as can be considered as a pure proton conductor at the range of operating temperatures whose proton transference number is above 0.99 [2-4].
The conductivities of proton conducting ceramics not only depend on material compositions, but also interrelate to the microstructure such as gain size, character of grain boundary related to the casting and sintering process [6-8].
The conductivities of proton conducting ceramics not only depend on material compositions, but also interrelate to the microstructure such as gain size, character of grain boundary related to the casting and sintering process [6-8].
Online since: October 2013
Authors: Wen Quan Huang, Yu Cong Liu, Chang Niu Yang, Ze Gang Sun, Lei Chen
This paper presents a structure evaluation method of the supporting plate of the steaming bucket, the evaluation indicator model is built based on fuzzy comprehensive evaluation theory, and the calculation of the structure evaluation is accomplished, so as to realize the better structure of the supporting plate, and maximize the scientific design of the plate correctly, which reduces fermented grains loss and production cost and to increase liquor distilling efficiency and liquor yield.
For example, evaluation matrix of hip range of motion is as follows: The same fuzzy evaluation matrix of the indicator layer and project layer can be obtained, finally can get all the fuzzy comprehensive evaluation matrix of project layer (is the layers of project number), such as the judgment matrix of the motion : D.
For example, evaluation matrix of hip range of motion is as follows: The same fuzzy evaluation matrix of the indicator layer and project layer can be obtained, finally can get all the fuzzy comprehensive evaluation matrix of project layer (is the layers of project number), such as the judgment matrix of the motion : D.
Online since: September 2013
Authors: Beáta Šimeková, Ingrid Kovaříková, Erika Hodúlová, Kristián Šalgó, Martin Kmec
However, a number of the inherent features of LSCM make the technique ideally suited to the characterization of worn metallurgical samples [3].
In the interdendritic area, where the borders of the columnar grains (Fig. 3), is excluded eutectics.
In the interdendritic area, where the borders of the columnar grains (Fig. 3), is excluded eutectics.
Online since: March 2013
Authors: Tian Bo Yu, Xiao Xu Huang, Niels Hansen
A number of recovery mechanisms have been proposed primarily based on studies on low strain material, and the objective of the present study is to demonstrate a phenomenologically new recovery mechanism in metals deformed to large strains.
The main driving force for coarsening comes from the grain boundary surface tension at Y-junctions and the curvature of receding boundaries in the vicinity of Y-junctions, although current theories of boundary mobility cannot explain the rapid Y-junction motion observed at low annealing temperatures [4].
The main driving force for coarsening comes from the grain boundary surface tension at Y-junctions and the curvature of receding boundaries in the vicinity of Y-junctions, although current theories of boundary mobility cannot explain the rapid Y-junction motion observed at low annealing temperatures [4].
Online since: February 2015
Authors: Peter B. Béda, Gyula Béda
As examples
Fig.1 A few types of gradient materials [3]
from the literature Fig. 1. shows various types of composites: a) short-fiber, b) long fiber, c) layered, d) particle, e) functionally gradient material, f) polycrystalline with different fracture properties of grain boundary, g) polycrystalline with small interfaces, and h) polycrystalline with thick interfaces.
Acknowledgements The work of the second author was supported by the National Scientific Research Funds of Hungary (OTKA contract number: K81531) References [1] R.D.
Acknowledgements The work of the second author was supported by the National Scientific Research Funds of Hungary (OTKA contract number: K81531) References [1] R.D.
Online since: February 2015
Authors: Shao Hong You, Yu Tao Luo, He Yang, Jie Liu
Pick up the one test point on the experimental plot, and the number of longitudinal samples were five with collected for each test point, and then depth of each sample is 20cm.
Characteristics of the enrichment coefficient and rules of arsenic, cadmium, lead of Rice, wheat grain [J].
Characteristics of the enrichment coefficient and rules of arsenic, cadmium, lead of Rice, wheat grain [J].
Online since: September 2018
Authors: R.L. Soares, Walman Benicio Castro
Increasing of the wheel velocities decreasing grain size and introduces defects.
The increase of wheel velocities from 20 m/s to 40 m/s probably introduces a greater number of defects in the structure, producing a DSC curve with disturbances [8].
The increase of wheel velocities from 20 m/s to 40 m/s probably introduces a greater number of defects in the structure, producing a DSC curve with disturbances [8].