Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: December 2022
Authors: Clodualdo Aranas Jr., Yuan Tian, Jubert Pasco, Kanwal Chadha
The polished sample was then analyzed using a Hitachi SU70 equipped with HKL Channel5 software to determine the morphology of grains, phases present, and crystallographic orientation using Electron Backscatter Diffraction (EBSD) analysis.
The MP1 region in the left shows huge grains that are mostly FCC (94.94 %), which is much higher than the as-printed samples (55.7 % [2]).
A higher volume fraction of the FCC phase reflects a more ductile material due to a larger number of independent slip systems [7], which is also the goal when solutionizing heat treatment was applied.
EBSD analysis of the heat-treated samples revealed huge FCC grains in the MP1 region and a refined acicular martensite microstructure in the MS1 region.
The MP1 region in the left shows huge grains that are mostly FCC (94.94 %), which is much higher than the as-printed samples (55.7 % [2]).
A higher volume fraction of the FCC phase reflects a more ductile material due to a larger number of independent slip systems [7], which is also the goal when solutionizing heat treatment was applied.
EBSD analysis of the heat-treated samples revealed huge FCC grains in the MP1 region and a refined acicular martensite microstructure in the MS1 region.
Online since: October 2009
Authors: Hitoshi Kohri, Ichiro Shiota, Atsushi Yumoto, Takashi Hashimoto
The original
particle size of MoS2 is 2-10 µm and the grain shows
flat and flaky shape.
The MoS2 grains are covered with small spherical grain of Cu of 1-2 µm in diameter.
Niwa: Tribology of Babbitt Metal with Solid Lubricants, AUSTRIB2006, paper number 0126
The MoS2 grains are covered with small spherical grain of Cu of 1-2 µm in diameter.
Niwa: Tribology of Babbitt Metal with Solid Lubricants, AUSTRIB2006, paper number 0126
Online since: September 2018
Authors: Antonio Vanderlei dos Santos, Tatieli Pivoto Anibele, Mauro Cesar Marchetti, Renato Przyczynski
Soon after, it was sieved by using the Bertel sieve, 0,589 opening, number 28 from the Tyler standard series.
The rounded-shaped larger grains were described as foundry sand mixed with other dust types.
The diameter of such grains measures from 4.8 mm to 0.075 mm [3].
Additionally, morphologically compact particles were also noticed, probably related to quartz grains present in the analyzed sample of waste.
The rounded-shaped larger grains were described as foundry sand mixed with other dust types.
The diameter of such grains measures from 4.8 mm to 0.075 mm [3].
Additionally, morphologically compact particles were also noticed, probably related to quartz grains present in the analyzed sample of waste.
Online since: August 2013
Authors: Aziz Azizan, Mohammed S. Kahtan, Ibrahim Hafed, Rahmat Azmi
In order to avoid any particle segregation due to gravity and grain size effects, the basic and additive element powders were mixed manually in a small glass container for 30 min.
Capillary force attracts the W-W grains together and help slide and rearrange the W particles to be more closely compacted.
Acknowledgements The authors would like to thank the Universiti Sains Malaysia (Incentive Research grant number (1001/227/PBAHAN/8044001) and the University of Omar Al-Mukhtar Libya for their motivation and encouragement in carrying out this work.
Fang, Microstructure and properties of fine grained W–15wt.% Cu composite sintered by microwave from the sol–gel prepared powders, J.
Capillary force attracts the W-W grains together and help slide and rearrange the W particles to be more closely compacted.
Acknowledgements The authors would like to thank the Universiti Sains Malaysia (Incentive Research grant number (1001/227/PBAHAN/8044001) and the University of Omar Al-Mukhtar Libya for their motivation and encouragement in carrying out this work.
Fang, Microstructure and properties of fine grained W–15wt.% Cu composite sintered by microwave from the sol–gel prepared powders, J.
Online since: April 2012
Authors: Zheng Liu, Ping Li Mao, Yuan Ding Huang, Le Zhou
Over the years, many efforts have been devoted to understand the phenomenon of hot tearing.[1-3] Industrial and fundamental studies of this phenomenon show that hot tearing occurs in the late stages of solidification when the volume fraction of solid is above 85-95% and the solid phase is organized in a continuous network of grains.
It is also known that a fine grain structure and controlled casting help to avoid hot cracking.
When the grains are no longer free to moved easily, the liquid mass feeding can not accommodate the strains developed during this stage.
In order to have an internal-consistent CSC for the multicomponent system, a scaling was introduced.[16] The value of is defined as: (5) where n is the number of alloying elements (for a ternary system, n=2), is the content of alloying element k in weight percent, and is the scaling factor for the binary system of magnesium and element k.
It is also known that a fine grain structure and controlled casting help to avoid hot cracking.
When the grains are no longer free to moved easily, the liquid mass feeding can not accommodate the strains developed during this stage.
In order to have an internal-consistent CSC for the multicomponent system, a scaling was introduced.[16] The value of is defined as: (5) where n is the number of alloying elements (for a ternary system, n=2), is the content of alloying element k in weight percent, and is the scaling factor for the binary system of magnesium and element k.
Online since: March 2007
Authors: Je Sik Shin, Sang Mok Lee, B.M. Moon, Bo Hyun Kim
Up until now, it has been reported that the brittleness of high silicon
steels is related to ordered phases (B2 and D03 structure), grain size, impurity on grain boundary etc.,
and the suppression of ordered phases by rapid solidification such as melt-spinning improves the
ductility of the silicon steels [4-6].
Results and discussion In the series of previous investigations, it was difficult to evaluate the unique effect of the ordered phases on cold workability, because solidification segregation, grain growth, oxidation etc. as well as the ordered phases were simultaneously considered [7].
A large number of short and wavy dislocations were observed in the bright-field image by g= 101 two beam along 011 zone axis, as shown in Fig. 3(a).
Results and discussion In the series of previous investigations, it was difficult to evaluate the unique effect of the ordered phases on cold workability, because solidification segregation, grain growth, oxidation etc. as well as the ordered phases were simultaneously considered [7].
A large number of short and wavy dislocations were observed in the bright-field image by g= 101 two beam along 011 zone axis, as shown in Fig. 3(a).
Online since: June 2010
Authors: Veronica Livescu, Ellen K. Cerreta, George (Rusty) T. Gray III
Average grain size of this material was 42 µm.
The samples had 40 µm equiaxed grains following annealing at 600 ºC for 1 hour.
This technique, described elsewhere in detail, enables the collection of twin data in numbers imparting statistical significance.
Usual indicators we are looking for are grain orientation gradients as witnesses of anisotropic deformation, enhanced localized misorientations as potential damage initiation sites, and deformation twins as suggesting a change in the balance of hydrostatic and deviatoric stresses and also potential damage nucleation sites were all examined.
The samples had 40 µm equiaxed grains following annealing at 600 ºC for 1 hour.
This technique, described elsewhere in detail, enables the collection of twin data in numbers imparting statistical significance.
Usual indicators we are looking for are grain orientation gradients as witnesses of anisotropic deformation, enhanced localized misorientations as potential damage initiation sites, and deformation twins as suggesting a change in the balance of hydrostatic and deviatoric stresses and also potential damage nucleation sites were all examined.
Online since: August 2018
Authors: Jun Tong Huang, Xiao Long Hou, Ming Qiang Liu, Zhi Jun Feng, Zhi Hui Hu, Xi Bao Li, Meng Zhang
The same phase was also identified in the case of using NaCl (Fig. 1c) and KCl (Fig. 1d), however, compared to using LiCl, the peak of MA spinel was lower and the peak of Al2O3 and MgO were higher, revealing that large number of MgO and Al2O3 did not react completely.
When magnified again, each MA spinel crystal grains were round plate with different shapes and sizes, the crystal grain sizes were between 3 and 8 μm.
Further observed from the surface of products, there were small grains with octahedral structure.
When magnified again, each MA spinel crystal grains were round plate with different shapes and sizes, the crystal grain sizes were between 3 and 8 μm.
Further observed from the surface of products, there were small grains with octahedral structure.
Online since: May 2013
Authors: Horng Huei Wu, Ming Feng Li, Tzu Fang Hsu
Bin (×K grains)
bjk
Waveband k (nm)
1
2
3
4
5
584~586
586~588
588~590
590~592
592~594
Light
Grade
j
(mcd)
1
0~50
40
50
60
40
30
2
50~100
30
60
70
60
20
3
100~150
30
40
50
50
40
4
150~200
20
80
40
80
20
5
200~250
40
30
50
60
30
6
250~300
40
30
40
30
50
Similarly, the wavelength is also divided into several wavebands (i.e., K wavebands).
Establish the order identification number, product specification, quantity and due-date for an order received (eg. i).
Step 3.2: t1=.1225+.1225+.1225+.1225+.07+.07=0.63 q1=g1/t1=170K/.63=269841 (grains) Step 3.3: Because d1(=11/15)-T(10/19)=27> F(=18)+B(=5), let oi=0.
(×K grains) Waveband(k) 1 2 3 4 5 Light Grade (j) 1 0.9 9.3 9.9 6 0.9 2 3.15 32.55 34.65 21 3.15 3 3.15 32.55 34.65 21 3.15 4 0.72 7.44 7.92 4.8 0.72 5 0.18 1.86 1.98 1.2 0.18 6 0.36 3.72 3.96 2.4 0.36 Conclusions The make-to-order production strategy is a general production model for the LED-CM plants to satisfy the variety requirement of their customers.
Establish the order identification number, product specification, quantity and due-date for an order received (eg. i).
Step 3.2: t1=.1225+.1225+.1225+.1225+.07+.07=0.63 q1=g1/t1=170K/.63=269841 (grains) Step 3.3: Because d1(=11/15)-T(10/19)=27> F(=18)+B(=5), let oi=0.
(×K grains) Waveband(k) 1 2 3 4 5 Light Grade (j) 1 0.9 9.3 9.9 6 0.9 2 3.15 32.55 34.65 21 3.15 3 3.15 32.55 34.65 21 3.15 4 0.72 7.44 7.92 4.8 0.72 5 0.18 1.86 1.98 1.2 0.18 6 0.36 3.72 3.96 2.4 0.36 Conclusions The make-to-order production strategy is a general production model for the LED-CM plants to satisfy the variety requirement of their customers.
Online since: September 2013
Authors: He Xi Zhang, Dao Cai Chi, Yong Tao Wang, Liu Liu
(2) Drought losses aggravation trend: the crops affected area and the grain losses are increasing: Figure 6 is the changes of the drought disaster over the years, Fitted the changes with quadratic curve, it shows upward trend, and the most serious disaster losses was in the late 1990s.
In 1950s, 1960s, 1970s, 1980s, and between 1999 and 2003, the annual grain losses caused by drought were 120,600 tons, 216,100 tons, 206,600 tons, 512,000 tons and 615,000 tons, the grain losses shown significant growth.
Besides the inadequate investment in engineering construction infrastructure, a large number of water conservancy project are in disrepair, there are more than 780 dilapidated reservoirs and the drought resistance ability can not get full play.
In 1950s, 1960s, 1970s, 1980s, and between 1999 and 2003, the annual grain losses caused by drought were 120,600 tons, 216,100 tons, 206,600 tons, 512,000 tons and 615,000 tons, the grain losses shown significant growth.
Besides the inadequate investment in engineering construction infrastructure, a large number of water conservancy project are in disrepair, there are more than 780 dilapidated reservoirs and the drought resistance ability can not get full play.