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Titanium Machining Properties Titanium alloys offer high strength-to-weight ratio, high toughness, superb corrosion and creep resistance, and biocompatibility, which are used mainly in aerospace, gas turbine, rocket and so on.
The low thermal conductivity and increased temperatures are the main factors of the weal of the tool and the surface quality.
Because the milling force and temperature are two main factors during the milling process, it is essential to simulate and forecast these two factors [4].
The tool geometric parameter is simulated only on two factors (rake angle and helical angle), these factors are very important for the milling process.
Conclusion The use of solid carbide milling tool for milling of titanium alloy, the axial depth of cut, radial depth of cut and tool rake angle, helix angle are the main factors which affect the milling process. 

Introduction Silicon nitride and carbide have extensively studied for structural applications due to a favorable combination of properties that include high strength, high hardness, moderate thermal conductivity, low thermal expansion coefficient, and unusual high fracture toughness.[1] These materials have been successfully demonstrated in a variety of applications, e.g., cutting tools, bearings, gas turbine engine components, and armor.[1] The understanding of mechanical properties at the microstructural level is critical for utilization and optimal design.[2] In order to investigate the microstructural effect on indentation damage behavior, Hertzian testing is preferred because it provides a tendency for brittle or quasiplastic deformation according to microstructure in brittle ceramics.[3] Several tough ceramics have been characterized with Hertzian testing method, including silicon carbide and nitride with controlled microstructure.[4] In present work, we followed
It is generally considered that the process occurring in dynamic deformation can differ significantly from static or quasistatic situations.[5] On the other hand, it is suggested that static mechanical properties are related to dynamic deformation.[6] However attempts to relate the static and dynamic damage are still insufficient.
Silicon Carbide and Nitride Data Material HP-SiC SS-SiC F- Si3N4 M-Si3N4 C-Si3N4 Processing condition Hot-press Solid-state sintering Hot-press at 1600 oC Hot-press at 1700 oC Hot-press at 1800 oC Hardness, H (GPa) 19.5 29.1 20.6 16.5 15.9 Toughness, T (MPa m 1/2 ) 3.75 2.46 3.8 5.3 4.9-7.3 † Strength, σF (MPa) 525 523 885 1084 792 Young's modulus, E (GPa) 442 440 331 326 314 Poisson's ration, ν 0.17 0.17 0.27 0.28 0.29 Yield stress, Y (GPa) 8.9 9.4 11.7 9.5 7.2 Strain hardening coefficient 0.8 0.7 1 0.7 0.5 † R-curve behavior is observed Table 1: Processing and physical properties of each material Table 1 shows the basic physical properties of various specimens.
The grain boundary structure and grain size are possibly key factors in the shock compression deformation in silicon nitride and carbide ceramics.
Grain boundary structure and grain size are key factors for determination of brittle or ductile failure in structural ceramics.

It is essential to produce microcapsules which possess clean rough shell surface, containing adequate active healing-agent, certain mechanical and thermal resistance to improve self-healing efficiency.
Yet, little work has been done on the temperature profiles as a significant effective factor to surface morphology, thermal stability and yields of microcapsule, which may improve self-healing efficiency.
In this paper, we focus on properties of microcapsules produced by three different heating routes (as shown in Fig.1).
Temperature increases following three different routes (Fig.1) after adding 30ml ENB into beaker at 500rpm mechanical agitation during encapsulation process.
As shown in Fig.5(b), the size distribution of three groups of capsules exhibits deviates to smaller diameter caused by turbulent flow in the middle of mechanical stirrer [6,8].

Introduction Corrosion morphology image is one of the most important features to evaluate corrosiveness of aluminum alloy, it adversely affects the security and integrity of the aircraft structure [1, 2].
Shot peening is often used to enhance the mechanical strength, wear resistance, anti-fatigue and stress corrosion resistance as a mature surface treatment process [4-6].
Currently, no studies are found about the corrosive characteristics and mechanical properties for the shot peening aluminum alloy corrosion.
Its mechanical properties are as follows: tensile strength is 510MPa, yield strength is 441MPa, elongation rate is 8% and Young’s modulus of elasticity is 71.7GPa.
The corrosion mechanism might be related to the following factors: residual stress is formed at the surface of the shot peening aluminum alloy, thus when apply to corrosion, the probability of the stress corrosion for the shot peening specimens will decrease greatly.

Recent study revealed that the process becomes complex and non-linear system as a result of multiple independent variables affecting GPG extraction process [14].
Simulation study was conducted at ANFIS optimum setting for predicting GPG yield based on the optimum factors in Table 6.
Okafor, The rheological properties of grewia gum, Nigeria Journal of Polymer Science and Technology, 2(2001) 169-175
Kunle, Effect of Grewia gum on the mechanical properties of Paracetamol tablet formulations, Afr J Pharm Pharmacol., 2 (2008) 1-6
Musa, K.Y Musa, Compression, mechanical and release properties of paracetamol tablets containing acid treated Grewia gum, J Pharm Sci Technol., 1 (2009) 74

The main factors affecting the durability of foil bearings were material covering mating surfaces, bearing geometry, way of assembling the bearing, rotational speed and load.
The top foil is coated on one side with the coating made of a synthetic fluoropolymer that has excellent sliding properties.
This was indicative of the problem with a poor heat transfer from the slide surface of the bearing towards the bush affecting the operating conditions and the wear of the slide coating.
The material properties that were utilized in the model are listed in Table 1.
Material properties used in the numerical model.

Results show that main factor which affecting COP of heat pump unit is inlet water temperature of condenser.
(16) n polytrophic index, κ adiabatic index, α variable associated with the structure size of compressor, ηυ compressor volumetric efficiency, Vth compressor theoretical gas volume flow rate,υ3 compressor inlet refrigerant specific volume, Wel compressor electric power, ηel electricity efficiency, ηm mechanical efficiency, ηmo motor efficiency.
The main program calls refrigerant property by REFPROP subroutines and experimental values are provided by manufacturer.
References [1] Jinghui Liu, Qinggang Li, Fazhong Wang, Lei Zhou: International Journal of Refrigeration.vol. 35(2012), p861 [2] M.W.Browne, P.K.Bansal: International Journal of Refrigeration.vol.24 (2001), p.612 [3] Long Fu, Guoliang Ding, Zujian Su: Applied Thermal Engineering.vol.22 (2002), p.1731 [4] Babak Solati, Radu Zmeureanu: Energy Conversion and Management .vol.44 (2003), p.1903 [5] C V Le, P K Bansal, J D Tedford: Institution of Mechanical Engineers.vol.219 (2005), p.95

Traditional methods of masonry modeling are based on the use of generalized ("effective") mechanical properties of the composite as a continuant homogeneous continuant medium.
Modeling of masonry within the concept of a continuant homogeneous medium is performed based on the continuant phenomenological approach, which requires defining 'generalized' mechanical characteristics adequately reflecting the mechanical properties of the composite as a continuant body while working in the construction.
With individual changes corresponding to the concept of ultimate limit states (method partial factors), the calculation methods for masonry structures, developed by Onishchik, L.I., are a part of existing standards.
Phenomenological approach is the basis of mechanics of a damaged continuant medium, according to which material destruction is any microstructural change determining the change in mechanical properties.
This means the loss of the property of continuant solution dependence on the input data, as well as the loss of properties of hyperbolic dynamics and properties of ellipticity in statics.

In addition, it also depends on the several other exogenous factors such as: work piece, tool material combination and their mechanical properties, quality and type of the machine tool used, auxiliary tooling, lubricant used, and vibrations between the work piece, machine tool and cutting tool however this other factors will not be considered in the research.
When an experiment involves two or more factors, the factors can affect the response individually or interactally.
Selecting the factors to be involved in the process and choosing the levels of these factors. 2.
[Table 2]: Factors and their levels Factors Level 1 Level 2 Level 3 A: Spindle Speed in (rev/min) 240 440 620 B: Feed in (mm/rev) 0.05 0.11 0.192 C: Depth of cut (mm) 0.5 1 1.5 Taguchi design L-27 for three levels and three factors yielded 27 experiments.
The types of chips formed are related to the material properties and cutting parameters such as speed, feed, etc.

In a Gambit was created automatic mesh (Fig. 5.) and was sets boundary conditions (water temperature at the inlet, velocity media, media type and its physical properties).
The SST formulation also switches to a k-ε behaviour in the free-stream and thereby avoids the common k-ω problem that the model is too sensitive to the inlet free-stream turbulence properties.
One of the other factors may be dimensions of the heating element (tube diameter and length), to increase the diameter and length of the spiral tube reduces heating time but also reduce the volume of heated water in the indirectly heated water heater.
Conclusion The results obtained from mathematical simulations of indirectly heated hot water heater, the temperature gradient 80 / 60 °C, it was found that the geometric parameters affecting the thermal performance indirectly heated hot water heater.
The simulations showed that the increase of thermal power water heater affects mainly spiral tube length and diameter spiral tube to a diameter of 0.0445 m beyond the average output of the water heater begins to decline.