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The soil physical properties mainly includes soil grain composition, cementation between soil particles, structure and pore characteristics, chemical content and moisture content, etc. [1] - [2]. 1 The physical properties of the soil samples Tests are made on physical indices according to the regulations of “Test Methods of Soils for Highway Engineering” (JTG E40-2007).
Table 2 Interaction model design table factors Test number 1 2 3 4 5 6 7 8 9 A 1 1 1 2 2 2 3 3 3 B 1 2 3 1 2 3 1 2 3 A*B 1 2 3 2 3 1 3 1 2 C 1 2 3 3 1 2 2 3 1 results 12.319 6.948 3.404 15.943 6.214 3.341 8.358 18.333 2.308 Table 3 Test schedule about influence factors of loess CBR level A compaction number /times B moisture content /% C Soil sample category /shanxi level 1 50 8 A level 2 75 12 B level 3 98 14 C 3 test result analysis From the result of table 2 and table 3 we can see that in 9 test numbers, the result of 8 is high then test number 4.The test number 8 represents the CBR of C soil sample category with water content of 12% and compactness by 3 layers at 98 times each layer.
Number 4 represents the CBR of C soil sample category under optimum water content and compactness by 3 layers at 75 times each layer.
（3）Specimen of the CBR value is increased with the increasing of compaction numbers
“Analysis on the influent factors of CBR value of fine grained soil” [J].

It is found that trace elements and aluminum can form dispersoids to improve the recrystallization resistance of aluminum alloys, control the structure of grain boundary etc.
These can stop cracks penetration along grain boundary [2].
The number of specimens of impact test shown in Fig. (2-2).
The value above indicates these alloy quenched in PAG have resistance corrosion best (A) alloy quenched in water because the alloy quenched in 30% polyethylene glycol the precipitates are uniformly distributed throughout the whole grain and these precipitates have higher efficiencies than those that accumulate along the grain boundaries perhaps because of greater breakdown of the passive oxide network.
Thus it means that diffuses uniformly it leads to shrinkage of grain boundary.

The lath martensite transformation subdivides a prior austenite grain on four different scales into packets, blocks, subblocks and laths.
The main microstructural contribution to the strength of bainitic and martensitic steel is from the extremely fine grain size of bainitic ferrite and the width of martensite lath [13].
The density of high misorientation grain boundaries of steel C was much lower than those of steel B and steel A.
The high misorientation grain/packet boundaries can efficiently arrest the propagation of cleavage microcracks [11].
The number of smallest ductile dimples decreased with the coiling temperature, indicating that the microcracks were easily initiated when the coiling temperature decreased.

The starting materials were a-Al2O3 powders with average grain size of approximately 0.5 mm, purity 99.99% (Zibo Dongchangye Alumina Co., Ltd.
China), a-Al2O3 nanoparticles with average grain size of approximately 100 nm, purity 99.9% (Shanghai TeamShare Nanotechnology Co., Ltd.
China) and (W, Ti)C solid solution microparticles with average grain size of 1 mm, purity 99.2% (Zhuzhou Cemented Carbide Group Co., Ltd.
A minimum number of five specimens were tested for each condition.
Whereas the fractured surface of SG-4 tool was characterized by a typical intergranular fracture with a large amount of voids left by grain pull-out (Fig. 6b).

LPSO phases always consist of structural blocks with five to eight close-packed atomic lanes and that various polytypes are formed depending on the number of atomic planes in the structural block and the stacking of the structural blocks [13-15].
Besides, a number of needle-like structures near grain boundaries which are parallel to each other can also be found.
The block shaped phase distributed along grain boundaries can be deduced as 14H-LPSO structure from the SAED pattern in Fig.4c.
Zr was added into the matrix to refine the grain size during solidification [28].
In addition, the needle phases near grain boundary are not only an insertion stacking fault with ABCA block but also have order arrangement of RE/Zn in closely packed planes.

Dislocation dynamic (DD) allows modeling creep [7] and fatigue [8], as well as active loading of a crystal [9,10] taking into account influence of external parameters, such as temperature, loading speed and grain size [11].
The number of remaining dislocations depends on both the initial number of dislocations, Fig. 6, and their distribution and lattice friction stress.
Figure 6 Dependence of the number of remaining dislocations on the initial number of dislocations, .
In this case, the dependence of number of remaining dislocations on friction stress has a slight slope, Fig. 5a, as does the dependence of number of dislocations remaining on initial number of dislocations, Fig. 6.
Jiang Investigation of grain size and shape effects on crystal plasticity by dislocation dynamics simulations Doctoral dissertation Université Paris Saclay (COmUE), 2019

The super-alloys made by the directional solidification technology, were basically eliminated transverse grain boundaries which are perpendicular to the stress axis, wherewith its unique columnar grains or single crystal organization which are parallel to the principal stress axis and preferred growth, what’s more, its superior mechanical properties, so, super-alloys get long-term development[2-5].
Its size, shape and number had a decisive influence on the ultimate mechanical properties of the alloy.
Methodology of quantitative evaluation of porosity, dendrite arm spacing and grain size in directionally solidified blades made of CMSX-6 nickel alloy.

Previous research demonstrated the most used solvent with low carbon number up to 4 such as methanol, ethanol, 1-propanol, 2-propanol, 1 butanol and 2-methoxyethanol [1].
It is clearly shown that the structures and grain boundary have differed for all samples.
Using ethanol as solvent has resulted on the attachment of the grain to each other and therefore, the grain boundary is not clearly seen.
Furthermore, the grain boundary is obviously seen compared to the ZnO films synthesized by ethanol.
The synthesis of ZnO using ethylene glycol shows the grain boundary is more prominent compared to other samples.

The results suggested that less MWCNTs will promote the formation of Ti(C, N) and TiC grains, but more amount of MWCNTs hindered the particles of the powders closing to each other, which made the sintering of grains uncompleted.
It can be exhibited that the fracture mode of the composites were mainly intergranular fracture of ceramic phases, which dimples remained in the fracture surface after pulling out of ceramics grains, and partially transgranular fractures with smooth fracture surface.
When the composites broken, ceramics grains were pulled out from metallic binder phase, left metal edges and dimples in the fracture surface of the composites.
Consequently, a large number of micro-voids were formed in the composites.

The influence of shock-loading on the mechanical behavior of metals and alloys has been investigated by a number of researchers.
The microstructure consists of a twin-free equiaxial grain, and an intense (0001) <10-10> basal texture, with most of the basal planes aligned parallel to the transverse direction–rolling direction (TD-RD) plane, as shown in Figure 1.
The axis of the disk was parallel to the rolled sheet normal direction (ND), with the crystallographic c-axis in most of the grains parallel to the shock loading direction, shown in Figure 1b.
These areas correspond to grain boundaries, twin boundaries, particles and regions of higher dislocation density. [11].
It mans that there exits more grain boundaries, twin boundaries, particles and regions of higher dislocation density in the higher shock peak stress samples.