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Introduction Porous Si3N4 ceramics with rod-like b-Si3N4 grains show superior mechanical properties, such as high strength, good thermal shock resistance, and high strain and damage tolerance[1,2], resulting them promise candidates for various applications, especially at high temperatures.
Characterizations of the starting power, such as particle size, purity, composition and so on, are the most important factors that affect microstructures and mechanical properties of the sintered samples.

With the progress of corrosion, the expansion volume of rust products, which is about 2–6 times the volume of the rusted steel, produces increasing mechanical forces to the surrounding concrete which eventually leads to damages to the structures such as longitudinal cracking, spalling and delamination of concrete cover and loss of the bond between concrete and reinforcement [2].
Chunhua Lu[12] developed a mathematical model in which the influence of the mechanical properties of the corrosion products on cover cracking and the amount of the corrosion products accommodated within the radial open cracks were considered.
Specimen preparation Fig. 1 Dimension and Arrangement of reinforcement of columns Material properties.
Factors controlling cracking of concrete affected by reinforcement corrosion, Mater.

The output factors investigated were limited to the material removal rate (MRR), tool wear (TW), and surface roughness (Ra) of workpiece.
The main properties of copper and graphite material used as electrodes in the present study are given in Table (2).
Mechanical and physical properties of AISI H13 [10].
Physical properties of graphite and copper electrodes [11].
[10] Y., Lin, K.M., McHugh, Y.S., Park, Y., Zhou and E.J., Lavernia, Microstructure And Mechanical Properties Of Spray-Formed H13 Steel Tooling, 134th Annual Meeting And Exhibition – The Minerals, Metals & Materials Society (TMS), INEEL/CON-04-02467, 2005

The wear resistance of special brasses was investigated by many researches and was found to be influenced by a few factors: relative proportions of α and β phases, solution hardening mainly affected by the presence of aluminum and overall hardness of the alloy [3,5,11].
Mula, Enhancement of mechanical properties of low stacking fault energy brass processed by cryorolling followed by short-annealing, Mater.
Kayali, Microstructures and wear properties of brass synchroniser rings, Wear 254 (2003) 532-537
Kacar, Effect of aging on the abrasive wear properties of AlMgSi1 alloy, Mater.
Maier, Effect of precipitation on mechanical and wear properties of ultrafine-grained Cu-Cr-Zr alloy, Wear 311 (2014) 149-158

The rule type is used to distinguish between exact reasoning rules or non-precise reasoning rules and credibility factor is to believe, and did not believe that degree into a number of man-made factors.
Production workers through the human-machine interface set and enter the required production of film or sheet material of Target Properties, so that follow-up reasoning.
[4] Giauque.Expert systems principles and programming [M] Beijing: Mechanical Industry Press, 2006
[10] Zhoudian Ming plastic extrusion process Manual [M] Beijing: Mechanical Industry Press, 2008
[11] Zhou Dianming.Plastic film extrusion [M] Beijing: Mechanical Industry Press, 2012.

Table 1 summarizes their mechanical properties.
Prior to fatigue testing, all of the specimens were electro-polished about 25µm from the surface layer to remove the work affected layer and make the surface observation easier.
As seen from the figure, both of initiation and propagation of a crack are Fig.1 Microstructures Table 1 Mechanical properties Fig.2 Shape and dimensions of specimen (c) L1 (b) M (a) S 10 5 106 107 0 100 200 300 400 500 600 700 800 RH% 25 85 △　▲　S ○　● M □　■　L1 Stress amplitude,σa (MPa) Number of cycles to failure, Nf (cycle) Fig.3 S-Nf curves 0 1x10 5 2x10 5 3x10 5 4x10 5 0.01 0.1 1 10 RH 25% RH 85% L1 σa=550MPa Coalescence of cracks No crack Crack length, l (mm) Number of cycles, N (cycle) Fig.4 Crack growth curves 0 1x10 5 2x10 5 3x10 5 4x10 5 0.01 0.1 1 10 RH 25% RH 85% L1 σa=550MPa Coalescence of cracks No crack Crack length, l (mm) Number of cycles, N (cycle) 10 5 106 107 0 100 200 300 400 500 600 700 800 RH% 25 85 △　▲　S ○　● M □　■　L1 Stress amplitude,σa (MPa) Number of cycles to failure, Nf (cycle) accelerated by humidity and the influence of humidity
As the factors of the accelerations in both processes of initiation and propagation of a crack, lowering of surface energy due to water absorption and hydrogen embrittlement are considered.

Experiments demonstrated that the Pd/Fe bimetallic particles could catalyze dechlorination process effectively, which was affected by several factors such as reaction temperature, Pd/Fe ratio, and the induction of Pd/Fe.
Due to its excellent film forming and protective properties, shellac is widely used in food industry, paint industry and pharmaceutical industry [1,2,3,4,5,6].
Compact chlorine affects the physicochemical properties of shellac and limits the usage in food industry and pharmaceutical area.
,Ltd., China). 2 Results and discussion 2.1 Elementary analyze and physicochemical properties testing The elementary analyze results and physicochemical properties of shellac, partial dechlorination shellac and low chlorine shellac dechlorinated by catalytic hydrogenation were displayed in Table 1.
The samples of low chlorine shellac was stored in refrigerator at 4～7°C for properties investigation.

The conventional energy transfer method for RUM is via slip ring, whereexists mechanical friction and has the potential risk of causing high-voltage discharge and electric sparks.
Moreover the direct-contact electricity transmission cannot work on a spindle rotating in high speed, which affects the machining accuracy and working efficiency of RUM [2].
Fig. 1Contactless power transfer system for RUM Modeling of rotary transformer The behavior of the rotary transformer is mainly determined by two factors: the geometry distribution of the pot core and the winding layout.
The relationship between these two factors is showed in Fig.2.
It can be explained by the material property of the ferrite that it could work with a frequency of 200KHz.

The Deformation Rule of the Cooled U75V Heavy Rail Caused by the Different Heat Transfer Coefficient Gao Mingxin1,a, Wang Peilong1,a, Jia Hao1,a, Tong shanhu1,a, Song Hua1,b, Yuan Siyu2,b and Wang Zhongqiang2,b 1School of Mechanical Engineering and automation, University of Science and Technology Liaoning, Anshan, Liaoning 114051, China 2Anshan Iron and Steel Co; Ltd., Anshan, Liaoning 114021, China agaoming31@163.com, bsonghua88@126.com Keywords: heat transfer coefficient; heat-stress couple module; bending curvature Abstract.
Introduction When rolled heavy rail is on the cooling bed for natural cooling, its bending deformation caused by solid phase changing and the section sizes contraction deformation occurs, there are many factors affecting cooled rail deformation, such as the initial cooling temperature, environment temperature and cooling velocity.
Cooling velocity can be controlled easily in the producing process, the air flow speed around rail is the main factor affecting cooling velocity, that can be measured in convective heat transfer coefficient [1].
Flashline TM-5000 Thermal Properties Analyzer which is produced by Anter company in United States is applied to measure U75V heavy rail specific heat capacity and the coefficient of thermal conductivity.

Mechanical roughing; 3.
Mechanical finishing; 4.
This is significantly affected by the number of re-installations of the part in the working area of the machine during processing.
[10] Yao, Y., Huang, Y., Chen, B., Su, Y., Feng, J., Influence of processing parameters and heat treatment on the mechanical properties of 18Ni300 manufactured by laser based directed energy deposition, Optics and Laser Technology, 105 (2018) 171-179
[13] Harooni, A., Iravani, M., Khajepour, A., Khalifa, A., Gerlich, A.P., Mechanical properties and microstructures in zirconium deposited by injected powder laser additive manufacturing, Additive Manufacturing, 22 (2018) 537-547