Search results

The outer diameters of the blade was Ø50 mm, and the thicknesses were 0.3 mm, the grain size was 600#.
Due to ultrasonic vibration, the ceramic Al2O3 striked the cutting grits on diamond blade, meanwhile, the workpiece surface was gonging to form a large number of micro-cracks, which is help to decrease of the sawing force.

When the number of alumina and silica ions increases, the stoichiometric proportion Al2O3/SiO2 increases.
According to the micrographs presented in Figure 4, it is possible to observe laminae of asymmetric particles and a few round grains.

The border of grain size is 4.75mm.
Carry on a large number of marshall experiments, and obtain the result (Table 2).

The Fig.5(b) shows that sample happened the non-uniform deformation, plastic deformation concentrated in a few narrow shear zone, when the stress to a certain extent will crack initiation, crack once formed, expanding quickly and fracture, in the shear zone is formed in context, wavy grain.
Section showed a context pattern, its deformation with uneven form, because it is the local fracture, when large numbers of shear zone is activated, fracture mode is the typical ductile fracture.

The inserts used in the experiment are cemented carbide coated with Ti(C, N)-Al2O3, which are made by Seco Tool Company with the catalog number of XOMX090308TR-M08, MP2500.
At the same time, tool wear can induce severe deformation of the crystalline grain in subsurface.

In the size of 100 μm×100 μm RVE, total number of 90,000 plane stress continuum elements (CPS4) is generated.
Furthermore, the influence of the crystallographic orientation of ferrite grains on the onset and location of damage is also under on-going study.

It is important to use hard stone materials, granite or similar materials for the ballast layer, which carry large pore volumes and are angular, rough in shape, thus provide high friction between the grains, preventing the excessive sleeper movements [2, 3].
Currently, worldwide, the number of sleepers integrated into the structure of railway systems is estimated three billion of which 15% is concrete sleeper.

The tests were experimented by the DG-49B well. it is only one well of porous geothermal reinjecting in Dagang District, it is deep as 1892m, water temperature is 62 degrees, as well as the initial flow rate is 85m3/h, the static water level is embedding at 77m, the essence is geothermal fluid compressed in the subsurface by reinjecting, it depends on strata lithology of thermal aquifers such as the range of rock grain size, the porosity and the permeability [2].
Table 1 Reinjecting experiments contrast table in different modes of washing well-reinjecting Number Accumulative Volume of Wash Well[m3] Accumulative Reinjecting[m3] Average Reinjecting[m3/h] The Ratio of Wash Well[%] Ⅱ-1 200 478 23.3 41.8 Ⅱ-2 394 2174 21.1 18.1 Ⅱ-3 202 1005 19.7 20.1 Ⅱ-4 312 1269 19.5 24.6 Ⅲ-1 715 3421 21.3 20.9 Ⅲ-2 84 133 24.2 63.2 Ⅲ-3 166 241 24.1 68.9 Ⅲ-4 247 431 26.5 57.3 In natural stage, reinjecting experiment takes steady flow aim at 25m3/h (Ⅳ-1), steady flow has reinjected by 20m3/h, lasting 91h, then the flow was improved to 25m3/h, on this flow reinjected lasting 95h. the effects are prior to the other previous tests.

Introduction Area array packaging (AAP) technology with the bumps as the I/O leads, which was born for the very large-scale integration (VLSI), has become one of the main interconnection methods for IC chips with large numbers of I/O leads.
The fast cooling rate was helpful to the grain refinement and to improve the mechanical property [6].

The static magnetic field changes the morphology of chromatic conversion coating, which led to a significant decrease on the number of microcracks in the coating.
The phosphate-permanganate conversion coating is composed of an amorphous structure and Zn2Mg(PO4)2 nanocrystallines with grain size less than 10 nm which embedded in an amorphous matrix.