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The alloys of titanium are few in number but have been categorized as being both a viable and attractive choice for corrosion-resistance and performance-critical applications.
The grains of the alpha phase (light in color) were well distributed through the matrix of the transformed beta phase (dark in color).
The large volume fraction of the alpha grains was predominantly nonuniform in both size and shape.
The cyclic fatigue test is the most widely used technique to establish the endurance limit of a metal by essentially determining the variation of maximum stress or stress amplitude with fatigue life quantified by the number of cycles to failure (Nf).
The alloy in the annealed condition has an alpha plus beta microstructure with the alpha grains of varying size and shape being well distributed through the transformed beta matrix. 2.

Welding is known to create tensile residual stresses, promote grain growth, recrystallisation and softening in the heat-affected zone (HAZ) [6,7], and to introduce defects that act as stress concentrations and preferential crack initiation sites.
A frequency of 1 Hz was used for all fatigue tests and the number of cycles to failure (N) was recorded for each specimen.
The number of cycles to failure (N) was recorded for each stress range (Ds) at the end of the test.
The HAZ and weld metal, characterised by large grain sizes and coarse second phase particles, were therefore found to be more prone to pitting than the base material [16].
As expected, the number of cycles to failure (N) increases with a decrease in the applied stress range (Ds).

The influence of an increasing number of freeze-thaw cycles on capillary absorption of water is studied first, then chloride penetration before and after exposure to a certain number of freeze-thaw cycles was determined experimentally.
For all five types of concrete ordinary Portland cement Type 42.5, river sand with a maximum grain size of 5 mm, and crushed gravel with maximum diameter of 25 mm were used.
Strength of concrete type C decreases with increasing number of freeze-thaw cycles.
Figure 2: Relative dynamic elastic modulus as function of the number of freeze-thaw cycles.
Figure 3: Capillary absorption of concrete type A after different numbers N of freeze-thaw cycles.

However, for bending strength, when the number of elements in model is less than about 9000, there exists obvious size effect, with the increasing of the number of the elements, the size effect will become less and less until disappeared.
The value of fracture toughness decreases with the increasing of the number of the model elements.
Generally, ceramics are polycrystalline, the factors influencing the mechanical properties of ceramics are significant and the distribution of crystal grain and porosity as well as the flaws of crystal lattice in materials.
For every model, we kept the ratio of height to width constant and increased the number of model elements gradually.
The biggest uniaxial compressive model used here is 0.9×1.8mm (the number of particles is 12032), and the biggest three point bending model is 2.7×0.54mm (the number of particles is 10828), the smallest uniaxial compressive model is 0.08×0.16mm (the number of particles is 95) and the smallest three point bending model is 0.4×0.08mm (the number of particles is 237), as shown in Fig.2

It has been observed that irradiated UO2 undergoes swelling (attributed to the accumulation of gaseous and even nanoscale solid-like fission products) as well as polygonization – the division of each grain into 104 – 105 sub-grains, especially at the peripheral regions subjected to high burnup [23, 24].
Changes to the structure and porosity of the grains, along with the formation of defect clusters and dislocation loops have also been observed [25, 26].
As the knock energy increases, the cooperative displacements become more prominent as exemplified by the four peaks with the 10 keV knock, which is double the number observed for the 2 keV knock.
The histograms are normalized by the number of ions in their respective groups.
Uberuaga, Efficient annealing of radiation damage near grain boundaries via interstitial emission, Science 327 (2010) 1631-1634

In the early deformation stage, SS-dislocations easily disappear through the dislocation interaction and movement to grain boundaries or surface.
(2) � Although a part of dislocations disappears due to the dislocation interaction and movement to surface or grain boundary, the number of stored dislocations should be proportional to ρm.
This suggests that a very little movement of a huge number of dislocations can produce a reasonable plastic strain that affects elastic proportional limit and 0.2% proof stress.

As for Transdniestr, increased lithium content (up to 0.16%) is determined within thin-layered fine-grained feldspar-quartz sandstones.
Lithium ore is light-grey, almost white, fine-grained rock of massive or not clearly maculose structure (sometimes maculose-band structure) consisting mostly of interconnected and interblending quartz-microcline-albite-petalite and quartz-microcline-albite structural-mineral complexes being characteristic metasomatic formations of metamorphosed original pegmatites.
The height of a grinding chamber and a number of passes of the material through it determine L value.
Obviously, crystallites are formed in the mineral due to the destruction process within the high-angle boundaries of the grains.
Mechanochemical ore activation for complete or partial release of mineral grains. 2.

Analysis of Fig. 1 and the data summarized in Table 1 shows that the most coarse-grained structure was obtained for the unmodified alloy, cast to ATD probe (sample 1),in which the average area of the silicon surface reach the value of 4317 μm2, the number of silicon precipitates per one mm2 was 9, and the shape factor amounted only 0.39.
For samples 1-4, in which the solidification has occurred in the standard ATD probe (with use of different variants of cooling), the obtained results of average area, the number of precipitates and the shape factor of silicon crystals, does not show a significant difference.
The use of graphite as the mold material (sample 5) for the unmodified alloy, caused (compared to the standard ATD cup) reduction of silicon crystal dimensions of about 400 μm2 and increase the number of them per 1 mm2.
Evaluation of selected stereological parameters of hypereutectic silicon crystals Sample Average area [µm2] Number of silicon precipitates [1/mm2] Aspect ratio F 1 4317 9 0.39 2 2453 28 0.58 3 2243 33 0.61 4 2333 37 0.62 5 3932 21 0.42 6 540 69 0.68 7 435 82 0.66 8 193 167 0.70 Summary This paper presents the methodology allowing to assess the impact of a number of parameters such as: modification process, the choice of material for the mold and the use of additional active cooling to the form.
The performed research, includes an analysis of the structure of obtained ingots (made from silumin AlSi17), led to the following conclusions: · The alloy modification , in each case leads to a reduction of average area of the hypereutectic silicon precipitates, increasing the number of them from 9 to 28 per mm2 (for the sampler ATD) and 21 to 69 per mm2 (for a graphite mold)

Introduction Sweet broad pea (Pisum sativum L.) which is an annual herb legume peas are climbing plants, grain can be eaten.
The adventitious buds of internodes inoculated into the medium for rooting, and observed the effect of NAA on adventitious buds rooting, counted root number and the root rates.
Table1 Effects of different hormone combinations on callus induction hormone leaves Internodes Cotyledons Stems BA NAA 2，4-D Number Induction rate Number Induction rate Number Induction rate Number Induction rate 0.0 0.0 0.5 30 83.3 30 100.0 30 10.0 30 93.3 0.5 0.5 0.0 30 23.3 30 46.7 30 0.0 30 43.3 1.0 1.0 0.0 30 90.0 30 100.0 30 13.3 30 96.7 Effect of 6-BA concentration on explants differentiation bud.
Table2 Effects of 6-BA on the differentiation and Germination of different explants Explants 6-BA(mg/L) numbers differentiated explants Differentiation rate/% Cotyledons 0.5 1.0 2.0 4.0 30 30 30 30 1 0 2 0 3.3 0.0 6.7 0.0 leaves 0.5 1.0 2.0 4.0 30 30 30 30 0 0 0 0 0.0 0.0 0.0 0.0 Internodes 0.5 1.0 2.0 4.0 30 30 30 30 11 19 26 5 36.7 63.3 86.7 3.3 Stems 0.5 1.0 2.0 4.0 30 30 30 30 0 0 0 0 0.0 0.0 0.0 0.0 Adventitious root induction.

Concrete durability, and water and other harmful liquids, gases, the number of its internal flow, scope, and therefore high impermeability of concrete, the durability is like.
At present, concrete waterproofing agent to improve the main principle of impermeability of concrete by increasing the density of concrete, reduce the number of unwanted holes, shrinkage compensation mechanism such as waterproof.
Therefore, by comparison research in rational use of concrete superplasticizer, while adding Mixed materials can greatly increase the impermeability of concrete, while improving the performance of concrete. 2.1 Mechanism Analysis of fly ash Fly ash contains more than 70% of glass beads, full grain shape, smooth, dense texture.
Because of its chemical composition contains a large number of active SiO2 and Al2O3, in a wet environment with Ca (OH) 2 and other alkaline substances in a chemical reaction to produce calcium silicate hydrate, hydrated calcium aluminate and other cementitious substances, powder ash products and enhance the role and can play a concrete block of concrete in the capillary tissue, improve corrosion resistance of concrete.
Reduce the number of the big holes, increasing the number of holes, the average pore size decreased, the distribution more reasonable.