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The annealing treatment produced polycrystalline NiTi (B2 structure) having a typical grain size of 10 µm.
The total number of FP insertions thus corresponds to a dose of 1.0 displacement per atom (dpa).

(3) Where n is the number of oxygen atoms in the oxide, MO and Mox are the molecular mass of oxygen and the oxide respectively, ρox is the density of the oxide. kp was calculated for a temperature of 850°C in static air with the equations (2) and (3), using data from literature [9,10].
Chromium and oxygen grain-boundary diffusion in polycrystals, Philos Mag A 66 (1992) 361-374

With industrial development, the number of tailings is becoming more and more and the height of dam body is higher and higher [2].
According to the sedimentary characteristics of tailings, grain composition, particle size change, tailings deposit from top to bottom can be divided into four basic accumulations.

The type in the geocell is SB200×400×1.5-8, the sheet chooses grain surface, the peel strength of the welding spot is 1000N/10cm, the thickness is 1.5±0.1mm, the height is 200mm.The welding distance is 400mm, which attaches 8mm punching.
The calculation results summarized in table 2 Table 2 The safety factor of the working conditions The number for working condition The protecting situation of the side slope Infiltration intensity （m/s） Safety factor The increasing percentage A1 unprotected 2.5×10-7 3.043 14.1% A2 Protection with geocell 2.5×10-7 3.472 B1 unprotected 2.0×10-6 1.732 13.7% B2 Protection with geocell 2.0×10-6 1.97 C1 unprotected 6.0×10-6 1.166 14.5% C2 Protection with geocell 6.0×10-6 1.335 Comparing to safety factor under the condition of the same rainfall intensity, we can conclude that in the same intensity under the action of rainfall infiltration, comparing the protecting slope that has geocell with the slope without protecting, the safety factor value all increases.

In the gas-solid flow process, the resistance which acts on gas mainly reflects the inertial effects of the gas, but also it is influenced by many factors, such as particle Reynolds number, flow of the turbulent motion, compressibility of the gas, gas temperature, shapes of the particles and the concentration, etc.
We usually choose single grain to study in Scientific researches, that is free settlement.

(13) Of course, the transition to dimensionless variables reduces the number of model parameters, i.e. its investigation will be easier.
Popova, Sharkeev Y.P., Modifying the structural phase state of fine-grained titanium under conditions of ion irradiation. 76, 11, (2012) 1238-1245

Results and discussion Fig. 1(a) shows the as-cast microstructures of AZ31 magnesium substrate, it indicates the grains sizes of α-Mg is from ~50 to 80 μm.
As Mg and Zn atoms diffuse rapidly, a large number of Mg7Zn3 phase is formed in the transition region. 3.

A number of studies have been reported on Cu-Cr composites.
On the other hand, further improvement of mechanical properties can be achieved by decreasing the composite grain size to the nanometric scale [6].

The first reference is a number that indicates the block of laminated bamboo guadua material from which were obtained and the second referenceFig. 1: Transformation of bamboo guadua.
The preparation of the surface was mechanically performed with abrasive papers of different grain fineness.

The filler's grains size oscillate between 40 nm and 3 000 nm (mean 550 nm).
Acknowledgement The author gratefully acknowledge the Polish Ministry of Science and Higher Education for its full financial support of this work (project number N507 163 32/0501).