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With the development of China's industrial and agricultural, silos are not only increase in number, but also rapidly expand in the size.
In 2001, China promulgated " Code for Design of Grain Steel Silos " (GB50322-2001).
It only fits for designing cylinder steel silos used to store bulk grain and the storage and discharge must be in the center.
Code for Design of Grain Steel Silos [s].Beijing: China Planning Press,2001
[3] Hailong Yuan, Chengzhou Guo: Grain Distribution Technology. (2007), p. 17-18

One has about 90% volume fraction of CBN grains with metallic binders referred to as high CBN content tools.
The other has about 0.5%-0.7% fraction of CBN grains in volume with ceramic binders referred to as low CBN content tools [6].
Tool wears of CBN in hard turning A large number of hard turning experiments have been conducted to study the wear mechanism of CBN cutting tools by many researchers.
The tool wear is mainly contributed by abrasion and the tool wear resistance increases with the increase of CBN grain content.
The wear resistance increases monotonically with decreasing grain size of CBN.

Fig. 2: Experimental setup of upsetting test (numbers indicate the sequence of procedure).
The martensitic matrix transforms into austenite (bright grains e.g. in Fig. 1-b) with precipitated chromium carbides primarily at grain boundaries. 2.
Melting begins due to the higher local carbon content at the grain boundaries where the carbides are primarily placed (Fig. 1-c). 3.
Depending on holding time and temperature (above 1220°C) the fraction liquid increases and separates the austenitic grains.
As the consequence, the grains form globular (Fig. 1-d).

Detailed information of the grain structure is necessary in the FSWs, because the grain structure can significantly affect the plastic deformation behaviors after yielding such as strain-hardening rate and hardening capacity in welds [2].
This leads to dynamic recrystallization where grains become more refined.
Number 0) is SZ, 1) and 2) is TMAZ and HAZ for retreating side, respectively, 3) and 4) TMAZ and HAZ for advancing side, respectively.
This indicates that the grain size in the SZ is smaller than the other zone.
This occurs because the FSW process, in which the center of the weld formed grain sizes finer than the area around the weld center. [6,7].

This was attributed to the active static and dynamic deformation mechanisms and a variation in dislocation density which influenced grain growth.
The influence of precipitates on the grain size and texture evolution through multi-stage industrial rolling has been considered [8].
The complexity of microstructures in titanium and nickel alloys, coupled with the large number of pertinent variables has made it clear that very accurate control and a thorough understanding of process parameters is required.
Whiteman, Recrystallisation and Grain Growth in Hot Rolling, Met.
Nes, Modeling Recrystallization Kinetics, Grain Sizes and Textures During Multipass Hot Rolling, Met.

Fig. 2 Experimental laboratory blasting equipment KP-1 Test conditions: - abrasive – steel grit GB 8 - STN 42 9823 dzD = 0,71 mm s - hardness of abrasive: 600 - 700 HV, - quantity of abrasive: 2 kg - wheel revolutions: n = 7000 rev/min - speed of blasting agent: vTP = 70,98 m/s - inclination angles of abrasive material: a = 0, 45, 75, 90 [°] - evaluation of weight loss after 25, 50, 100, 300, 500, 1000 rotations, - number of samples in a series: 5 Abrasive was exchanged during the experiment so as to ensure its operational lifetime and also due to the change of geometric characteristics of the grains.
Fig. 3 Macrostructure test sample This is a fine-grained ferrite-pearlite structure.
In HAZ (Heat affected zone) formed by bainite structure which is presented in Fig. 4, a significant grain coarsening ocurred.
As the chemical analysis of these inclusions was not performed it can be assumed that based on the literature knowledge they are sulfidic and fine-grained carbidic inclusions [12,13].
In the impact of particles at the 90° angle, so-called forging effect of the incident grains is prevalent.

At the same time, the grain size of ZAO thin films are increased and the crystalline quality can be improved with increasing depositing temperature, because it can provide sufficient energy in the crystallization process.
It can Produce the different oxygen adsorption in the process of film, and cause the accumulation of miscellaneous grain boundaries of different quality, and affect the grain size and orientation.
Therefore, the films scattering mechanisms may be expressed: (Eq. 2) Where is for ionized impurity scattering mobility, is for grain boundary scattering mobility, is for lattice vibration scattering mobility.
For TCO thin films, grain boundary scattering isn’t main scattering mechanism, and it may be neglected.
Because the wavelength is greater than the intrinsic absorption limit (360nm), the electromagnetic wave absorption coefficient of ZAO thin films decrease rapidly, most of the energy of visible light can be transmitted, only a very small number of energy is reflected and absorbed.

The area of it is about 45km2 and the population is 450000, the quantity of drainage is 165000m3 /d, and the sewage disposal was only 50, 000m3/d, so a large number of sewage was directly discharged into ditches and natural river without any prevention of seepage which caused the groundwater to be polluted seriously.
The filtration and depuration of rock-soil are related with the size of grains and its penetrability.
The more the size of grain of rock-soil is big, the more the penetrability is better, and the more the filtration and depuration are weak for sewage.
d) The anaerobic reductive environment of groundwater distributed as belt along the direction of replenishment by polluted water river, the width of belt is related with the size of grains of rock-soil, the hydraulic gradient, the concentration of sewage and infiltration time.
The more the hydraulic gradient and the size of grain of rock-soil is great, the penetrability is better, the concentration of sewage is high, the more the width of belt is wide.

Due to the stronger bonding of Ge-Te, Ge may enter into the lattice of Sb2Te and replace the position of Sb, further restraining the growth of grains.
Number Sample Thickness [nm] Annealed temperature[℃] TC [W/mK] #1 Ge2Sb2Te5 114 unannealed 0.13 #2 Ge2Sb2Te5 114 annealed 250 0.45 #3 Ge0.15Sb2Te 110 unannealed 0.11 #4 Ge0.15Sb2Te 110 annealed 250 0.39 #5 Ge0.61Sb2Te 105 unannealed 0.10 #6 Ge0.61Sb2Te 105 annealed 250 0.23 It can be clearly found that the TC of annealed films (crystalline state) is larger than that of as-deposited films (amorphous state).
With the increase of Ge concentration, the increases in crystallization temperature and data retention and the decreases in grain size and TC were observed in Ge doped Sb2Te thin films.
Due to the stronger bonding between Ge and Te, Ge may enter into the lattice of Sb2Te and replace the position of Sb, further restraining the growth of grains.
The decrease of grain size is helpful to obtain little volume of phase change cell and decrease the discrepancy of phase change cell.

As-received steel had elongated grains along rolling direction.
However, each grain can be regarded as almost fully recrystallized ferritic grain, because there are less low angle boundaries within the grains.
Similar elongated grains were observed from the OM images in rolled steels by the reduction of 20% and 50%.
This means that the dislocations were introduced within the grains.
As seen in these figures, both the fractured tensile specimens contain deformation twins with the thickness of some micrometers near the fractured plane in both specimens, however, the number density of twins in the as-received sample was much higher than that of the 50% rolled sample.