Search results

This consideration is consistent with the well-known results of grain boundaries: The energy cusps only exist for the geometries where the dislocation model is applicable.
Thus, the number of the O-cell walls around each O-point is the same as the number of admissible Burgers vectors in lattice a.
Corresponding to a selected reference lattice a, the number of DgP-I’s is same as that of gP-a’s.
The up limit of the number candidates of singular interfaces is probably the same as the number of singular surfaces, which is often restricted by the number of gP-a’s.
Table 1 shows the number of POPs, the number of DgP-I(’s) normal to a POP, and the set(s) of dislocations in a POP for different O-elements.

,n, where n is the number of discrete values for the selected parameters.
These points correspond to the moments when the number of simultaneously meshed teeth pairs change.
The standard basic rack module and number of teeth were also predefined [5].
For this reason upper and lower limits are specified as a function of the number of teeth [10, 11].
Gliha, Behaviour of small cracks during their propagation from Vickers indentations in coarse-grain steel: An experimental investigation, International Journal of Fatigue, 33 (2011) 1505–1513.

There are a number of theoretical models describing reactive magnetron sputtering.
Compared to other methods, RSD makes it possible to control the growth of the coating, heating of the substrate, and also to obtain coatings with a higher density and with a smaller grain size.
The number of molecules of the compound increases, which leads to further poisoning of the target and a decrease in the sputtering rate.
There are a number of ways to ensure the operation of RSD installations in the transition region.
Acknowledgement This study was performed under the «ERA.Net RUS plus» program and funded by the RFBR, project number: 20-53-76012.

During rolling, people mainly pay attention to the following problems: (1) dimensional precision and geometrical shape of slabs [1, 2], such as the thickness, width; (2) microstructure and property of slabs [3], such as grain size; (3) surface quality of slabs [4], such as surface roughness; (4) defects and their distribution in slabs [5~7], such as cracks.
When the reduction ratio is 5%, in the whole view of fracture surface, a small number of zones are dimple fracture which means that these zones can achieve crack healing, but most zones are the cleavage fracture where the crack does not heal (Fig. 7(a)).
When the reduction ratio reaches 20~30%, as the reduction ratio further increases, the size and the number of dimple fracture zones increase (Fig. 7 (c) and (d)).

The connotation of nano surface engineering according to how easy it is to realize the industrialization includes: ①making composite coating which has a specific nanoperformance, improving abrasive resistance and corrosion resistance; ②making nanometer diaphragm; ③making grains in tens of microns depth of the metal surface layer to change microns into nanometer through the specific processing method, in order to achieve nano structured on the surface; ④nano-finishing of materials or membrane; ⑤making the excellent engineering properties coating which was constituted by nano-materials.
Composite brush plating technology is not only more mature, but also has many advantages, such as easy operation, portable equipment, flexibile process, rapid plating speed, a number of coating types and so on.
The number of cyclic times was the contact fatigue life of specimen.

However, design load of vehicles increases, number of vehicles doubled increases and vehicles overload, all of these factors greatly increase rolling intensity and frequency on highway, and lead to severe fatigue and damage of highway. lastly, operation customers often remake their vehicles to increase the height and load of vehicles driven by economic interests.
Overloading vehicles are still driving and continuous operation with a large number.
In order to set complex surface, the upper layer laid 10cm thick asphalt concrete surface, the sublayer laid 15 ~ 20cm cement concrete surface, and set plaster layer and coarse grained gravel soil layer at the same time.

With more Zn and O atoms absorbed, the cluster collapsed into a tetrahedron as a nucleus of T-ZnO, which consisted of four equivalent grains having triangular dipyramidal shapes.
Acknowledgements This work was financially supported by the National Natural Science Foundation of China under grant number 50774014, and the project of “863 Plan of China” under grant number 2008AA03Z514.

Slip bands impinging upon oxidized grain boundaries in Waspaloy tested in LCF at 527oC.
Furthermore, the number of load/temperature paths is unlimited making it a practical impossibility to do sufficient testing to cover all possibilities.
L/H) resulted in fracture at the number of cycles that would be expected for isothermal cycling at the higher temperature.

Properties Nano TiO2 Shape of particle Nearly spherical Density (g/cm3) 4.3-5.4 specific surface area (m2/g) 200-240 Average grain size (nm) 10-25 Putity(%) 99 Sample preparation method.
(1) Where, S = stiffness, MPa e = natural logarithm to the base e, A and b = regression constant, N = number of loading cycles Fig. 2 demonstrates the difference in stiffness of normal samples with that of the samples modified by 4% TiO2 nanoparticles.
Fig. 3 shows the fatigue life of origin asphalt sample and modified asphalt sample with 4% nano TiO2 at different strain levels against the number of loading cycles.

Nomination Continuous energy input Pulsed energy input Number of pulses: 1 2 Intermediate time: tint (cycle) 0 15 Weld time: tw (cycle) 12 6 Weld current: Iw (kA) 5.75 6.35 Weld voltage: Uw (V) 1.40 1.46 Electrode pressure: Fs (bar) 3 3 Fig. 1 Hardness distribution, spot weld and impact test specimen of the joints of DP 1000 steel examined in the experiment, welded a) with a continuous energy input, b) with a symmetric double pulse b) a) Fig. 2 SEM pictures from the structure of nuggets a) dendrite structure with continuous energy input, b) tempered ring with symmetric double pulse.
In order to capture the correct microstructure evolution, a number of material properties are required for present simulations.
The short time above Ac3 was limited grain growth, producing an ultra-fine structure upon cooling in this region.