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The number of steel-frame buildings is increasing as a result of development of social economy.
The bainite and fine grains are mainly beneficial to the elevated temperature UTS.
The grain size of ferrite in steel N1 is 53.7 μm.
Steel N2 have finer grain size of ferrite and higher content of bainite.
This may caused by different of microstructure, chemical composition and grains size.

The primary β grains are more than 1000μm in size, as shown in Fig. 2(a).
One is grain refinement strengthening due to the refinement of α colony.
A number of micro pores are found on the lamellae interfaces, as shown in Fig. 6(a).
With the addition of B4C, the primary β grain is refined, the grain boundary α phase is eliminated and α colony size decreases. 2.
Grain refinement of cast titanium alloys via trace boron addition.

A large number of welds cannot be avoided during the manufacturing and installation of the equipments.
At the second period, the grain structure can be observed clearly.
It also can be seen from the picture that the fine grain zone is easier to be corroded than the coarse grain zone.
In addition, the fine grain zone is easier to be corroded than the coarse grain zone. 4.
The microstructure of the base metal is austenite twins. 2) There is locally non-uniform in the grain and the corrosion rate is varied with the grain size.

It can be observed from figure 5 that under different sintering temperatures, the grain boundary of AZ91 formed the second phase distributed granularly or continuously, and the number and distribution of the second phase varied with the change of temperature.
Under the sintering temperature 450℃, the quantity of the second phase was less, and there were more holes in the grain boundary.
At the sintering temperature of 550℃, the quantity of second phase was sequentially increased, and it distributed continuously in the grain boundary.
At the sintering temperature of 600℃, the grains of sample become coarse, and the quantity of second phase was less, and the holes were bigger than that of 550℃on the contrary.
This proved that the sintering temperature is so high, that the first crystallization continued to be heating, and a few special grain boundaries migrated quickly, resulting some grains grown up.

The mean grain diameter of the unmodified sample is 251 µm, and the mean grain diameter of the modified one is 194 µm.
The grains become rounder.
The grain roundness of the unmodified sample is 1.46, and the grain roundness of modified one is 1.29.
The mean values of the loss of wear mass (mg) in dependence of number of cycles (N) could be seen in fig. 10.
The mean grain diameter of unmodified samples is 251 µm, and the mean grain diameter of modified ones is 194 µm.

These kefir grains have a complex microbial composition depending on the origin of the grains, as well as on the method of culturing and substrates added (1).
An increasing number of studies have demonstrated that EPS (Non-starch PolySacchride) from marine and fungal organisms could possess strong antitumor activity (6).
Preservation of kefir grains, a comparative study.
Lactobacillus kefiranofacienssp. nov., isolated from kefir grains.
KPB-167B isolated from kefir grains and characterisation of its extracellular polysaccharide.

The work has shown that precipitation can occur at a much finer scale and higher number density than hitherto considered, but that pipe diffusion leads to rapid coarsening.
Electron spectroscopic imaging was undertaken to determine the NbC precipitate size distribution and number density in thin foil samples.
Precipitation of NbC in a model Fe-30Ni-1.6Mn-0.1Nb alloy occurs predominantly on dislocation cores and grain boundaries, with no precipitation found within the matrix. 4.
Both the size and number density are consistent with those observed in conventional microalloyed C-Mn steels.
Recrystallisation and Grain Growth, Eds: B.

Microstructure characterization by X-ray diffraction and atomic force microscopy revealed no phase changes due to nanoprocessing and the grain size of the NC surface layer was ~ 40 nm.
Keywords: Corrosion behavior, grain size, nano-scale, organic inhibitor, synergism.
The nano-scale grain size (< 100 nm) including the high volume fraction of grain boundaries which may comprise as much as 50 % of the total crystal volume, could give rise to unique corrosion performance, different from those of the conventional polycrystalline counterparts [1-3].
XRD patterns of the top surface layers of the nanocrystalline and polycrystalline LCS specimens The surface microstructure of the NC specimen illustrated in the AFM images in Fig. 2 at different magnifications also provides visual evidence of the nanocrystalline grain size as well as the characteristic high population of grain boundaries.
(1c) Reduction in the number of defects has been shown to reduce the Fe dissolution rate by shifting the equilibrium of Eq. 1a to the left [23].

This alloy is used for large number of industrial applications since it possesses medium to high strength to weight ratio, excellent weldability and corrosion resistance.
Even though a number of welding procedures are available, the most convenient and economical procedure of tungsten inert gas (TIG) welding was used to weld Al-Mg-Si sheets.
This is possibly due to the grain refinement occurring in the fusion zone.
Experimental results showed that the grain structure of the HAZ, fusion line and weld metal appears to have tangible relationship with pulse parameters.
The HAZ is supposed to contain coarser grains and high residual stresses.

How to detect protein content of wheat grain quickly and accurately is particularly important.
We use FOSS Infratec 1241 grain quality analyzer to scan, whose wave length from 850 to 1050nm and step size of 2nm.
Wheat grain protein content in each range segment contains some number of samples showed a normal distribution.
The number of samples for each section of each set is shown in Table 1.
But the number of needed correction samples is far less than initial correction set.