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Samples were subjected to various numbers of FSP passes from 1 to 3.
FSP offer low energy consumption route to introduce reinforcing phases into the metal matrix and to form bulk composites, grain refinement and grain boundary pinning [5].
The effect of excess heat generated at high shoulder rotational speed on grain growth is eminent.
Increasing the number of FSP passes works in favor of high hardness while high rotation speed leads to softening effect, grain growth and stress relive and therefore it deteriorates hardness.
Increasing the numbers of FSP passes results in more uniform dispersion of Al2O3 particles.

In a number of cases literature data for pure copper and magnesium alloys are cited.
Superplasticity It is known that coarse-grained materials with the grain size over 10 μm do not exhibit characteristics of superplasticity [22].
The view of the samples of the magnesium alloy ZK 60 processed by ECAP with the number of passes n equal to 1, 2, 3, 4, 6, shown after tension to failure to 1500, 3050, 2130, 2100, 930 %, correspondingly (Т= 473 К, ε =10-4s-1).
In spite of a significant number of publications on the properties of NSM, the tribological behaviour, the mechanisms of friction and wear for such materials have been studied poorly.
Until very recently, they have been inconsiderable in number due to difficulties in synthesis of macroscopic samples suitable for testing.

Sample number 1 shows the highest passive current, the second one is sample number 2, then number 3 and number 4.
Passivation potential of sample can be ranked from high to low as below: number 1, number 3, number2 and number 4.
Sample number 1 has the highest passive current, the second is number 3, the third is number 2 and the last is number 4.
Passivation potentials of samples can be ranked from high to low as below: number 1, number 2, number 4 and number 3.
It must to be pointed out that sensitized sample number 4 shows worse passivation properties than number 3, the reason might be number 4 has a higher carbon content, after sensitization much more chromium carbides precipitate near grain boundary leads local chromium depletion.

Thus, there is no simple relationship between the number of passes and the extent of the uniform elongation.
By contrast, there is a tendency for the flow stress to decrease with increasing numbers of ECAP passes.
Figure 2 shows the evolution of the Vickers hardness as a function of the number of ECAP passes.
It is apparent that the flow stress depends on the number of passes of ECAP and this dependence is not continuous.
Fig. 2 Evolution of microhardness in ZK60 magnesium alloy processed by different numbers of passes of ECAP Fig. 3 True stress-strain curves for the ZK60 alloy processed by different numbers of passes of ECAP.

Their characteristics by fractional composition are proposed: large-fractional, with grains from 2 to 150 mm in size, medium-fractional with a grain size of 0.5 to 2 mm, and fine-grained with a grain size of 0 to 0.5 mm.
Comparing the grain composition of MFMSHP to GOST 8736-2014 "Sand for bilding works.
Comparing the grain composition of MFMSHP to GOST 25100-2011"Soils.
Classification" they fall into the group of sand grains ranging from fine to coarse grain mainly containing medium ones.
Studies have shown that there is certain correlation between the amounts of coal at different fractions: its lower number is contained at fractions of >0.63mm, average number at fractions of<0.16 mm and a greater number at fractions from 0.16 to 0.63mm.

With a large sampling space fewer peaks are counted as representing a grain as illustrated in Fig sampling space (ssopt) suggested by Blunt and Ebdon [ fulfil the relationship given in Eq spacing would consider each grain to have a number of peaks that are in actual fact cutting edges on the same grain.
A smaller sampling spacing would consider each grain to have a number of peaks that are in actual fact cutting edges on rain.
The optimum for measuring the number of grains should is the stated grit size in microns.
Both wheel 1 and 2 experience a drop in the number of summits (Sds) present which reiterates the view that the grains are fracturing or are being pulled out.
The parameter Sds has been shown to provide information on the overall reduction in the number of grains while Ssc has hinted that for some wheels the grains are self-sharpening.

Temperature and Humidity Measurement System for Grain Storage Based on nRF905 Yang Shulian1, a, Shen Jin2Li Zhenmei3, Tan Boxue4 and Zhao Kai5 1, 2,3,4,5 School of Electric and Electronic Engineering Shandong University of Technology, Zibo, China a email-yangsl21cn@163.com Keywords: temperature and humidity measurements; Wireless communication; nRF905; grain storage.
A temperature and humidity measurement system for grain storage is developed.
Introduction Temperature and humidity measurement using Microcomputer is an indispensable means for safe stored grain in silo.
General System The diagram of measurement system for grain storage is shown in figure 1.
With the increase of the number of greenhouse, and being greater the area of its cover, the transmission power of nRF905 does not meet the actual demand, thus the circuit of amplifying power based on the chip of PA2423L is designed to improve systemic output power and realize further receiving and transmission distance.

It is suggested that the large numbers of precipitates of Nb(CN) in the steel makes the structure transmissibility more serious.
The asymmetric prior austenite grains (PAG) are clearly outlined by the grain boundary allotriomorphic ferrite (GAF), whose size is between 50-200µm.
Large numbers of fresh austenite nucleus come into being and destroy the orientation relation of PAG, so that the structure is refined apparently.
Accordingly, refinement effect will gradually decrease until completely disappear along with the increase of cycle number.
(2) Large numbers of precipitates of Nb(CN) in the CFB/M-Nb steel makes the structure transmissibility more serious

The AISI serial numbers include steel type 1006(6A), 1008(8A), 1010, 1015, 1018, and 1022 [2~3].
This is mainly because the twisted and deformed grains are gradually recovered and part of second crystal grains develop and combine to greater crystal grains.
In one of them, ASTM grain numbers for wire materials of 6A and 8A are greater than that of 1T wire materials.
Table 3 The integrated table of the average grain size for each set of wire material Wire material number Position 1 Position 2 Position 3 Position 4 ASTM grain number Rolling 1T 9.3 9.1 8.9 9.3 9.1 Rolling 6A 8.9 9.0 9.0 9.2 9.0 Rolling 8A 8.9 9.3 9.5 9.3 9.3 Annealing 6A 9.2 8.7 8.8 9.1 9.0 Annealing 8A 6.8 7.7 7.4 7.4 7.4 Conclusions This study makes comparisons and analyses on the wire rod materials of extra low carbon steels and low carbon steels on mechanical properties, micro-structures, crystal grain sizes.
ASTM grain numbers for wire materials of 6A and 8A are greater than that of 1T wire materials.

Enhanced Formability of Ultrafine-Grained Aluminum Blanks by Local Heat Treatments M.
The high shear stresses during the rolling cycles result in an ultrafine-grained microstructure with an average grain size ranging between 200 to 1000 nm.
The extremely high plastification and the very high shear stresses during the rolling result in a very fine grained structure.
By repeating this process cycle, the grain structure can be refined more and more; depending on the number of rolling cycles the ARB blanks are referred to N1, N2, etc., where N1 stands for one rolling cyle, N2 for two rolling cycles and so on.
Moreover, the measured relative grain size increases match almost exactly the measured relative yield strength reductions as described by the hyperbola correlation of yield strength and grain size in the HallPetch law.