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Online since: February 2021
Authors: Prithu Mishra, Shruti Sood, Pradeep Khanna, Mayank Pandit
Here the powders are not fully melted and the increased temperature on the grain surface is responsible for the fusion of powders [6].
These processes can bring about desired improvements in porosity levels, precipitate phases, grain size, grain orientation and mechanical properties [69].
The ST time should be brief enough to limit grain growth and at the same time long enough to dissolve the unwanted precipitates.
High layer resolution although produces a better surface finish, the greater number of layers required to achieve the desired geometry are responsible for a significant increase in the product lead time.
High layer resolution can provide better surface finish but the build time increases due to the necessity of greater number of layers required to achieve the desired geometry.
These processes can bring about desired improvements in porosity levels, precipitate phases, grain size, grain orientation and mechanical properties [69].
The ST time should be brief enough to limit grain growth and at the same time long enough to dissolve the unwanted precipitates.
High layer resolution although produces a better surface finish, the greater number of layers required to achieve the desired geometry are responsible for a significant increase in the product lead time.
High layer resolution can provide better surface finish but the build time increases due to the necessity of greater number of layers required to achieve the desired geometry.
Online since: September 2003
Authors: Cheng Yong Wang, C. Rolf
The number of effective cutting diamond grits and their effective depth of cut depend on the segment
position and protrusive height of the diamond grits on it.
It has been found that the number of the effective cutting diamond grits of the segment increase with the increase of the depth of cut.
The AErms of AE signal not only indicated the brittle fracturing process of stone but also gave some information about the properties of different minerals, grain boundary, and pre-existing cracks in grains [3, 21-22].
The load per diamond is also calculated referring to the number of effective cutting edges, which are measured in the tests.
A new method is proposed to calculate the number of effective diamond grits on the surface of segment.
It has been found that the number of the effective cutting diamond grits of the segment increase with the increase of the depth of cut.
The AErms of AE signal not only indicated the brittle fracturing process of stone but also gave some information about the properties of different minerals, grain boundary, and pre-existing cracks in grains [3, 21-22].
The load per diamond is also calculated referring to the number of effective cutting edges, which are measured in the tests.
A new method is proposed to calculate the number of effective diamond grits on the surface of segment.
Online since: August 2012
Authors: Jainagesh A. Sekhar, G.S. Reddy, Mallikarjuna N. Nadagouda
The grain size was about 10 micons.
The colony count numbers were not reduced by the stainless steel surface compared to the number of colonies observed from the bacterial solution.
The original grain structure is magnified in (a1) and (b1) and (b2).
The SS316L grain size is about 10 microns and the SS304 has an average grain size of about 35 microns.
The original grain size is no longer visible in 13(c) and 13(d).
The colony count numbers were not reduced by the stainless steel surface compared to the number of colonies observed from the bacterial solution.
The original grain structure is magnified in (a1) and (b1) and (b2).
The SS316L grain size is about 10 microns and the SS304 has an average grain size of about 35 microns.
The original grain size is no longer visible in 13(c) and 13(d).
Online since: March 2008
Authors: Shahrum Abdullah, W. Mark Rainforth, A.K.A. Ihsan, M. Hassan, Mariyam Jameelah Ghazali
Detailed secondary electron microscopy (SEM)
performed on the longitudinal cross sections of the worn alloys indicates that the subsurface deformed
layer beneath the worn surfaces is composed of a number of distinct layers like the mechanically
mixed layer (MML), the shear deformed and bulk layers with increased hardness as the surface was
approached.
Considering that the displacement was a direct result of shear deformation, the equivalent plastic strain, ε was calculated from the shear angle between grain boundaries and the normal to the worn surface, θ [2,4,5,11]; θ ε tan 3 3 = (1) by assuming that the shear deformation is parallel to the surface (refer to Figure 2).
The deformed structures consist of rotated and elongated primary grains towards the sliding direction.
Considering that the displacement was a direct result of shear deformation, the equivalent plastic strain, ε was calculated from the shear angle between grain boundaries and the normal to the worn surface, θ [2,4,5,11]; θ ε tan 3 3 = (1) by assuming that the shear deformation is parallel to the surface (refer to Figure 2).
The deformed structures consist of rotated and elongated primary grains towards the sliding direction.
Online since: January 2021
Authors: Lahcene Mebarki, Abdelyamine Boukhobza, Kamel Fedaoui, Lazhar Baroura, Karim Arar
The compaction pressure influences the number and size of the pores.
The characteristics of the powders DESIGNATION: C Carbon black from natural gas DESIGNATION: Fe Iron Powder DESIGNATION: Co Cobalt Powder DESIGNATION: W Tungsten Powder Technical Index Technical requirement Technical Index Technical requirement Technical Index Technical requirement Technical Index Technical requirement Humidity ℅ ≤ 0.5 Purety (%) ≥ 98 Iron Fe (%) ≤ 0.30 Iron Fe (%) Av grain ≤ 0.1 Ash content ℅ ≤ 0.1 Oxygen O2 % ≤ 0.6 Carbone C % ≤ 2.50 Oxygen O2 % ≤ 0.25 Volatile substance ℅ ≤ 1.5 Apparent density g/cm3 0.7 Oxygen O2 % ≤ 0.50 Chloride residue (%) ≤ 0.13 Results and Discussion In iron alloys, since the iron particle generally has a spherical shape with a regular microstructure of the grain boundaries, as the diffusion in these spherical particles has a higher activation energy than non-spherical particles.
The characteristics of the powders DESIGNATION: C Carbon black from natural gas DESIGNATION: Fe Iron Powder DESIGNATION: Co Cobalt Powder DESIGNATION: W Tungsten Powder Technical Index Technical requirement Technical Index Technical requirement Technical Index Technical requirement Technical Index Technical requirement Humidity ℅ ≤ 0.5 Purety (%) ≥ 98 Iron Fe (%) ≤ 0.30 Iron Fe (%) Av grain ≤ 0.1 Ash content ℅ ≤ 0.1 Oxygen O2 % ≤ 0.6 Carbone C % ≤ 2.50 Oxygen O2 % ≤ 0.25 Volatile substance ℅ ≤ 1.5 Apparent density g/cm3 0.7 Oxygen O2 % ≤ 0.50 Chloride residue (%) ≤ 0.13 Results and Discussion In iron alloys, since the iron particle generally has a spherical shape with a regular microstructure of the grain boundaries, as the diffusion in these spherical particles has a higher activation energy than non-spherical particles.
Online since: December 2014
Authors: Decio Lopes Cardoso, Talita Bassegio Kaminski, Francine Stelle Goldoni, Guilherme Irineu Venson, Camila Daiane Cancelier
These results suggest that RHA promoted the formation of new products filling the pore space of the composite, changing the clayey material in a nature of a continuum, while the BSS promoted a substantial aggregation of the particles, wherein the soil reinforcement transformed clay in a particulate material coarser grain size.
There comes a binding effect, due to the increase in the number of contacts between the soil particles, and the strengthening of preexisting contacts.
Joint-analysis of the effects listed above suggests a substantial aggregation of the particles, wherein the reinforcement transformed the clayey soil into a particulate material of coarser grain size.
There comes a binding effect, due to the increase in the number of contacts between the soil particles, and the strengthening of preexisting contacts.
Joint-analysis of the effects listed above suggests a substantial aggregation of the particles, wherein the reinforcement transformed the clayey soil into a particulate material of coarser grain size.
Online since: May 2007
Authors: Sung Yong Shim, Su Gun Lim, Hwan Goo Seong, Jin Ho Jeong
The microstructure of resultant specimens
were characterized by measuring grain sizes of primary austenite and its solid fraction, using an
optical microscope equipped with a digital image analyzer.
For this reason, the aspect ration was higher, but solid fraction was smaller because of smaller number of nuclei when compared to those at 10 deg.
For this reason, the aspect ration was higher, but solid fraction was smaller because of smaller number of nuclei when compared to those at 10 deg.
Online since: July 2011
Authors: Hong Peng Tian
Therefore, features and trends of edge detection based on GM(1,1) can be summarized as:
1) Determination of the pixel number in grey modeling.
Now, the number of pixels in GM(1,1) in most case are fixed, such as four, nine, twenty-five etc. 2) Determination of the threshold in judging the prediction error.
For example, the data sequences are preprocessing before the Grey relational grades are calculated or after the edge detection is finished, some improved measures are implemented. 5) Compared with the technique based on GM(1,1), the methods based on Grey relational analysis are more mature and approaching to specific applications, such as crack detection of the pavement image[24] and edge detection of pests in stored grain image [14], and the image type is extended from visible-light image to remote sensing image and IR image. 5 Conclusions Currently, although the application of Grey theory in image processing is far from maturation and has a long way to go before it is widely used like fuzzy theory, more and more researchers at home and abroad have paid attention to Grey theory for its feasibility and efficiency in image engineering [2].
Investigate on image’s edge detection of pests in stored grain based on grey relational analysis [J].
Now, the number of pixels in GM(1,1) in most case are fixed, such as four, nine, twenty-five etc. 2) Determination of the threshold in judging the prediction error.
For example, the data sequences are preprocessing before the Grey relational grades are calculated or after the edge detection is finished, some improved measures are implemented. 5) Compared with the technique based on GM(1,1), the methods based on Grey relational analysis are more mature and approaching to specific applications, such as crack detection of the pavement image[24] and edge detection of pests in stored grain image [14], and the image type is extended from visible-light image to remote sensing image and IR image. 5 Conclusions Currently, although the application of Grey theory in image processing is far from maturation and has a long way to go before it is widely used like fuzzy theory, more and more researchers at home and abroad have paid attention to Grey theory for its feasibility and efficiency in image engineering [2].
Investigate on image’s edge detection of pests in stored grain based on grey relational analysis [J].
Online since: October 2011
Authors: Nan Jun Lai
National Development and Reform Commission said they adopt fiscal policies to support, support part of the grain into fuel ethanol, To the end of Eleventh Five-Year, the proportion ethanol gasoline consumption accounts for the national gasoline consumption increased from less than 20% to over 50% [7].
An explanation is that the temperature rise of seawater caused to a large number of gas hydrates decomposition, the greenhouse effect caused by methane gas made the global temperature increase suddenly, and the oxygen deficit of seawater resulted in a large number of marine organism extinction and migration.
Grain Distribution Technology , 2010, 4:36~43
An explanation is that the temperature rise of seawater caused to a large number of gas hydrates decomposition, the greenhouse effect caused by methane gas made the global temperature increase suddenly, and the oxygen deficit of seawater resulted in a large number of marine organism extinction and migration.
Grain Distribution Technology , 2010, 4:36~43
Online since: September 2012
Authors: Wei Min Wang
So far, it has a large number of high conductivity of solid materials to replace the liquid electrolyte.
Organic plasticizer Plasticizer dissolved in the polymer matrix can effectively increase the polymer chain movement, reducing the polymer's glass transition temperature, and also played the role of solvation, and promote full dissolution and ionization of the lithium salt, increase the number of carrierto improve the problem of low conductivity of solid polymer electrolyte, in particular the low-temperature electrical properties.
BK Choi, et al. study found that of PEO / inorganic nano grain boundary ionic conductivity contribution to the enhancement of the ionic conductivity from Lewis O atoms in the Lewis acid sites of the inorganic particles and polymer matrix acid-alkali.
McLachlan, An equation for the conductivity of binary mixtures with anisotropic grain structures[J], Journal of Physics C: Solid State Physics, 1987, 20(7): 865-878
Organic plasticizer Plasticizer dissolved in the polymer matrix can effectively increase the polymer chain movement, reducing the polymer's glass transition temperature, and also played the role of solvation, and promote full dissolution and ionization of the lithium salt, increase the number of carrierto improve the problem of low conductivity of solid polymer electrolyte, in particular the low-temperature electrical properties.
BK Choi, et al. study found that of PEO / inorganic nano grain boundary ionic conductivity contribution to the enhancement of the ionic conductivity from Lewis O atoms in the Lewis acid sites of the inorganic particles and polymer matrix acid-alkali.
McLachlan, An equation for the conductivity of binary mixtures with anisotropic grain structures[J], Journal of Physics C: Solid State Physics, 1987, 20(7): 865-878