Search results

For instance, the electrodepositing coat of Ni has only mechanical embedment effect on grains and matrix, so it can’t supply enough bonding force for its interface with grains and matrix.
But little effects have been obtained and abnormal breaking off for grains cannot be effectively controlled.
Fig.1 Topography of the brazed diamond grain Fig.2 Different resultant at the brazing interface As can be clearly seen from Fig 1, the topography of single brazed diamond grain, there is a typical appearance of soakaging and climbing of brazed bonds surrounding the grain along the diamond surface.
Fig.3 Monolayer brazed diamond tool samples Journal Title and Volume Number (to be inserted by the publisher) 9 The monolayer brazed diamond tools with optimum grain distribution to have been developed triumphantly in our lab cover with almost all series of tools including milling, shearing and drilling cutting, which settles a foundation for further industrialization exploitation.
The size, number, form and distribution characterization of resultant at the brazing interface under different brazing conditions was discovered and the brazing mechanism for diamond was illuminated. 2.

The microstructure is composed of quasi-polygonal ferrite grains, whose average grain size is about 4μm.
Large number of nanometer TiC particles distribute along dislocations.
Grain size has been measured by image analysis software and the average grain size is about 4.0μm.
Large number of nanometer particles and high density dislocations exist in ulta-high strength steel.
(2) A large number of nanometer particles distribute along dislocations.

The original matrix microstructure of as-cast ZL205A alloy consists mainly of α (Al) phases and a large number of θ (Al2Cu) phases on grain boundaries, and the grain orientation is random distribution before extrusion (Fig. 4(a)).
The original matrix microstructure of as-heat treatment ZL205A alloy consists mainly of α (Al) phases and a large number of θ (Al2Cu) phases on grain boundaries, and the θ (Al2Cu) phases along the grain boundaries tended to random distribution (Fig. 5(a)).
After 2 passes, the number of dimples increased, and the depth was almost the same(Fig. 6(c), 6(d)), it’s due to microstructure of cast alloy is refined, and the micro crack growth is affected by the small grains around it, resulting in the resistance of its diffusion bonding increases, and expands to the boundaries of large grains.
After 1 pass, the number of micro voids and pits of fracture decreased than cast alloy, and the number of dimples increased in comparison to cast alloy after 1 pass.
(2) The original matrix microstructure of ZL205A alloy consists mainly of α (Al) phases and a large number of θ (Al2Cu) phases on grain boundaries.

In usual cases, coarse crystal grains are included in aluminum casting alloy.
The two problems arise because of the existence of the coarse crystal grains.
For an accurate estimation of the stress measurement by neutron diffraction, a sufficient number of crystal grains must exist in the gage volume.
However the casting materials usually include coarse crystal grains.
The total number of measurement points was 616.

Study on evolution of partial texture of different grains during grain growth in IF steels W.
The grain size and evolution of partial texture of small, medium and large grains were investigated during grain growth.
For such large mapping areas, the number of grains ranges between 10 thousand and 50 thousand according to the annealing conditions. 3.
At early stage of grain growth, the sample possesses initial grain size and low ODF level.
(a) (b) Small grains Medium grains Large grains Small grains Medium grains Large grains Fig.3.

Journal Title and Volume Number (to be inserted by the publisher) 5 Ultrasonic velocity.
A propagating wave is scattered at grain boundaries and absorbed by dislocations, grain boundary scattering being the dominant effect.
Journal Title and Volume Number (to be inserted by the publisher) 7 Figure 6 shows examples where the ultrasonic velocity is plotted against temperature for annealing of two different steel types.
Journal Title and Volume Number (to be inserted by the publisher) 9 Figure 8.
An alternative approach has proved to give good correlation to grain size although it cannot provide absolute values of grain size.

Citation & Copyright (to be inserted by the publisher ) Grain-Size-Dependent Cooperative Grain-Boundary Sliding in Superplastic Deformation H.
The aim of this work is to examine the grain size dependence of SPD by the use of 3Y-TZP with seven different grain sizes.
lo Journal Title and Volume Number (to be inserted by the publisher) 3 0.05µm), and then etched at 1300 oC for 1hour.
The S-S curve strongly depends on grain size.
-4.4 -4.3 -4.2 -4.1 -4 -3.9 7 7.1 7.2 7.3 7.4 7.5 Maximum flow stress, log ����max[Pa] Normalized grain size, log (R/D) [-] F G C A B E Slope=1.0 D Journal Title and Volume Number (to be inserted by the publisher) 5 the maximum true stress �max is related to R and Do [� �max ( / )oR D ].

It is important to state that the aim is not to completely replace experiments but reduce their number and improve their efficiency by predefining which samples are better suited for experimental validation.
Additional features such as number of neighbors, triple junction angles or clustering of some properties might be considered as well, but are ignored for the time being.
If n points are randomly placed in a box of which the size depends on the number of grains n and the average grain size of the target distribution, the resultant distribution is the so-called Poisson-Voronoi which exhibits a lognormal distribution with a variance of 0.424 [2].
(c) 3D section of the resultant grain set.
Once the grain set is defined, the following step is to create the texture by assigning orientations to each grain.

The number of grains in a model of a 10 µm square area was changed from 23 to 1200.
Average grain size, number of nodes and number of elements of each FEM model are shown in Table 2.
Figure 6 shows the Young's modulus as a function of number of grains obtained by FEM analysis.
C11 C12 C44 165.7 GPa 63.9 GPa 79.6 GPa Table 2 Average grain size, number of nodes and number of elements of FEM models.
Soboyejo: ASTM STP 1413(2001), p.1411 10 1 10 2 103 160 170 180 Young's Modulus GPa Number of Grains n n=23 n=52 n=101 n=300 n=1200 Mean Value Fig. 6 Scatter of Young's modulus as a function of number of grains

This model is named as fine-grained access control model based on RBAC.
So when it is so strict with rank and information secrecy, it will be easy to realize and it reduces the numbers of roles.
If only roles can be used, the number of roles required is numerous.
This makes the number of roles reduce and the same role may be in the different departments.
So if we can control these atomic-level objects, fine-grained access control can realize.