Search results

Table 1 Vickers hardness of Fe-Al alloy[3] laser 825 HV 30μm 434 HV Al:30 HV S45C: 175-240 HV 300μm Fig.3 Cross section of the testpiece after laser processing P = CW300W, r0 = 1.3mm, V = 5.0mm/s, Number of scan : 10times In the periphery of laser irradiated area, thin alloy layer was observed in only the part of thin Al foil, though the alloy layer was not observed in the part of thick Al foil because heat flux is insufficient for laser alloying.
Fig.4 SEM image and the composition distruibutions of Fe, Al and C of the periphery of laser irradiated area in which S45C did not harden P = CW300W, r0 = 1.3mm, V = 5.0mm/s, Number of scan : 10times Laser surface alloying with high speed laser scanning.
Froyen, Recovery, recrystallization and grain growth in Fe3Al-based alloys, Intermetallics, Volume 10, Issue 5, (2002) pp.473-484

At present, sea sand is the main source of incoming sediment the grain of incoming sediment from the sea is fine.
In the simulation of floods traveling on both nature and design conditions, the grid width is 10m, so the number of longitudinal nodes is 544 and the number of lateral nodes is 133,so there are totally 72,086 nodes.

The models presented a number of elements that ranged from 60072 to 116865 and a number of nodes that ranged from 123444 to 218045.
Mechanical and biological properties of the micro-/nano-grain functionally graded hydroxyapatite bioceramics for bone tissue engineering.

In the casting filling process, mechanical vibration shows the remarkable effect on dendrite fragmentation, grain refinement, flow of metal, shrinkage cavity improvement, porosity and casting performance, which have been proven in the studies of F.Taghavi, H.Saghafian, Zhao Jianhua, Zhao Zhong, Jiang Fan, etc[1-5].
More often than not, conclusions are drawn on the basis of a large number of experiments in vibration filling studies at present.
(a) Early filling (b) Mold filing (c) Difficult filling (d) Full Fig. 5 The filling process in multidimensional vibration The Simulation Test Results and Analysis Table 3 Test Design Scheme (L9 (34)) and Results Test number A B C Null column Filling Time yi/(s) 1 1 1 1 1 7.54 2 1 2 2 2 7.37 3 1 3 3 3 7.21 4 2 1 2 3 7.18 5 2 2 3 1 6.97 6 2 3 1 2 7.02 7 3 1 3 2 6.81 8 3 2 1 3 6.72 9 3 3 2 1 6.58 K1 22.12 21.53 21.28 21.09 K2 21.17 21.06 20.99 21.20 K3 20.11 20.81 21.13 21.11 k1 7.373 7.176 7.093 7.030 k2 7.056 7.020 7.043 7.066 k3 6.703 6.936 6.996 7.036 Range R 0.670 0.24 0.096 0.036 Factors sequence A＞B＞C Table 3 lists orthogonal experiment results in filling under multidimensional vibration.

It should be noted that the silicon concentration in this paper is the proportion of silicon atoms number.
By comparing four structures in Fig. 8, it can be inferred that the most stable structure is the structure containing the relatively less number of silicon atoms.
Yu, Formation mechanism of bulk nanocrystalline aluminium with multiply twinned grains by liquid quenching: A molecular dynamics simulation study.

The grain size at the austenitizing temperature must be known for calculation of microstructure composition.
If the total volume is divided in N number of control volumes, discretization system has N linear algebraic equations, with N unknown temperatures of control volumes.
For axial symmetric body a system of 2N linear algebraic equations with 2N unknown displacements can be formed, where N is number of control volumes.

The Ca2+ ion has a coordination number of 12, located in the center of the unit cell, and each Ti (IV) core has a coordination number of 6 [2].
The irregular shapes and large grain sizes also indicate the agglomeration due to the high-temperature calcination synthesis.

The result of grid using grid generation software Gambit is shown in Fig. 1 and the grid number is about 250,000.
The requirement for the initial value is strict since the calculation of stress is necessary in Reynolds Stress equation Model (RSM), which increases the number of equations in calculation and difficulty of calculation convergence.
Li, et al., Study on performance of axial symmetry-inlet cyclone, Journal of Zhengzhou Grain College, 21 (2000) 34-37

Pulse number corresponding to value is obtained by sampling and preserved by MCU.
Serial number Actual thickness [mm] Result by TR technology [mm] Result by focusing technology [mm] 1 7.9 7.9 8.0 2 7.8 7.8 7.9 3 8.0 8.1 8.0 4 8.0 8.0 8.1 5 8.1 8.0 8.0 6 8.1 8.0 8.1 7 8.0 8.0 8.1 8 8.1 8.0 8.1 9 8.0 8.0 8.0 10 8.0 8.0 8.0 Conclusion The ultrasonic wheel probe takes silicone rubber as wheel skin.
Monchalin, Thickness and grain size monitoring in seamless tube-making process using laser ultrasonics, NDT&E International, 2006, vol.39, pp. 622–626

Poyang Lake area is the main production areas of grain and cotton of Jiangxi province, in which the use of chemical fertilizer quantity is up to 350,000 tons in 2008 [2].
As the situation worse of world financial crisis, the labor-intensive industries in the coastal export-oriented enterprise survival difficult, layoffs and even collapse, and caused large numbers of migrant workers returning home.
At the same time, the employment problem a large number of university graduates is also a big society problem.