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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.
Online since: April 2012
Authors: Yuan Ding Huang, Ping Li Mao, Zheng Liu, 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.
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
Online since: March 2007
Authors: Sang Mok Lee, B.M. Moon, Bo Hyun Kim, Je Sik Shin
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).
Online since: June 2010
Authors: George (Rusty) T. Gray III, Veronica Livescu, Ellen K. Cerreta
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.
Online since: May 2013
Authors: Tzu Fang Hsu, Ming Feng Li, Horng Huei Wu
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.
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.
Online since: July 2015
Authors: Taisiia O. Berestok, Anatoliy S. Opanasyuk, Denys I. Kurbatov, Hyeon Sik Cheong, Andreu Cabot
In particular, we detail here the influence of condensation time on the crystal phase, texture quality, lattice constants, grain size, coherent scattering domain size (CSD), microstrain, stress and concentration of dislocations.
The grain size and microstrain in the direction perpendicular to the crystallographic planes (002) are in the range L ~ 26-42 nm and e ~ (0.59-3.09)×10-3, respectively.
There are a number of reports devoted to the investigation of structural properties of ZnO deposited by different methods [18, 19, 20, 21, 22].
The pole density was calculated using the equation: , where and are the integral intensity of the i- diffraction peak for the film samples and the standards, respectively; and N is the number of lines in the diffraction pattern.
The average dislocation density, which forms the boundaries of the blocks, is [30], where n is the number of dislocations in each of the six faces of the block.
Online since: December 2012
Authors: Adele Carradò
Target HA Substrate Ti Fluency [J/cm2] 2.6 Dynamical pressure [Pa] 30 Pa H2O vapours Distance target-substrate [mm] 40 Pulse repetition rate [Hz] 2 Number of pulses 20000 Substrate temperature [°C] 400 Coating thickness [µm] 1.2 2.2.
Pulsed laser deposition hydroxyapatite surface is compact and well-crystallized and exhibits a quite irregular morphology: some grain-like particles and droplets - partially covered with a thin film and embedded in a bigger particle - were observed by FESEM on the surface of the film (Fig. 3a).
In Fig. 3b, the spin-coated sol-gel hydroxyapatite coating reveals grains of between ca. 100 and 200 nm, these grains resulted in a “coral-like'' surface.
Some parts of the coating consist of small grains (100-200 nm), with other parts show bigger wire agglomerates of ca. 400 nm).
Moreover, the HA layer presents an important porosity after grit-blasting, between the various grains, associated with the high fabrication temperature.
Online since: February 2024
Authors: Oleksandr Kuprin, Margarita Bortnitskaya, Orest Ostash, Roman Chepil, Volodymyr Sverdun, Igor Kolodiy, Vitaliy Belous, Viktoriya Podhurska, Tetiana Prikhna
An analysis of the intensity distribution of the carbide lines revealed the presence of a strong {111} texture, meaning that the grains are predominantly oriented by the {111} crystallographic planes parallel to the sample surface.
The intensity distribution analysis of the carbide lines showed that the {220} texture was present, indicating that the grains are predominantly oriented with {220} crystallographic planes parallel to the sample surface.
In #1 coating homogeneous fine-grained microstructure forms (Fig. 2 c).
This is consistent with our previous grain size calculations, where this coating was characterized by the smallest grain size (9.3 nm).
Both coatings have no columnar structure, and some number of macroparticles on the surface is indicated.
Showing 18761 to 18770 of 28518 items