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The surface roughness , surface residual stress and work hardening constitute the three major factors affecting the quality of the workpiece surface [1].The surface roughness as an important factor in precision machinery manufacturing has aroused widespread concern [2].
Surface roughness largely determine the performance of various aspects of the use of parts, such as the contact stiffness, abrasion, corrosion, and fatigue properties.So study the formation mechanism of surface roughness, and establish the mechanical model of roughness has a certain practical significance.
The surface roughness equation, (7) This roughness mechanical model indicates that the surface roughness is influenced by the nose radius, cutting edge radius, elastic modulus, cutting force, flow stress,and material hardness.The mechanical model of the surface roughness is covering most of factors,so for the prediction of surface roughness has a higher accuracy.
The mechanical model does not take into account the factors - tool wear, flutter and other aspects.In the future research ,we need to establish a more perfect mechanical model.
Beijing: Mechanical Industry Press.1982, 10

But good mechanical properties and excellent corrosion resistance of 2205 duplex stainless steel depend on well controlled welding process, which determine the proportion of austenite/ferrite and microstructure, so study of its welding properties is of considerable importance.
So does the TIG process. 3.2 Mechanical Properties Test 3.2.1 Hardness Test According to GB2654-89, Micro-hardness measurement is performed using M-400-H1 microhardness tester.
Conclusion Welded joints of 2205 duplex stainless steel with Er2209 welding wire as filler metal have good mechanical properties and corrosion resistance.
Amount of heat input effects biphase proportion, grain size, mechanical properties and corrosion resistance, the weldment with fine grains, good mechanical properties and corrosion resistance can be obtained via employment of proper heat input.
By solution treatment at 1050°C for 30min and water cooling rapidly at more than 25℃/s, austenite content of weld , heat-affected zone can be increased, grain refined, mechanical properties and pitting corrosion resistance improved and toughness of heat-affected zone is restored.

From the results, the UV light treatment affects the wettability properties of the anodised titanium without changing its microstructure and surface morphology.
This is due to the excellent mechanical properties of titanium such as high corrosion resistance, good mechanical properties, lightweight, and biocompatibility [2].
There are various factors that can affect the changes on phase formation of the titanium oxide such as type and concentration of electrolyte, applied voltage, current density, temperature, agitation speed, and surface area ratio [14-16].
So, the UV treatment is not contributing on the factors that can affect the phase changes on the titanium oxide as the UV light only affect the OH group of the specimen [8-10].
The Fig.3 also shows that the UV-A wave type produced more hydrophilic properties than UV-C.

Similarly, Chaudhari et al. [12] showed that extrusion parameters such as die geometry, temperature and ram speed greatly affected the mechanical properties of shaped extrusion, flow pattern, and grain structure.
The processing factors used in this study Factors Level Code -1 0 +1 Ext.
Improving mechanical properties of Al 7075 alloy by equal channel angular extrusion process.
The effect of ram speed on mechanical and thermal properties in ecae process simulation.
Enhancement of mechanical properties of AA 6351 using equal channel angular extrusion.

The key factor affecting life of progressing cavity pumping system is the rotor speed.
Taken these parameters as original inputs, the nonlinear mapping relationship between rotor’s rotational speed and its affecting factors are determined by means of artificial neural network, and establish the output speed prediction model.
Screw pump speed was mainly governed by the following factors: (1) Temperature affect on speed Fig.1 Temperature affect on speed Because screw pump stator rubber liner has obvious properties of heat bilges cold shrink.
(2) Oil viscosity affect of speed Fig.2 Oil viscosity affect of speed Oil viscosity is one of the larger factors influenced on screw speed.
Conclusions Based on the experimental data of ESPCP system, this article use the artificial neutral network method to establish the optimization model that between the output speed and its affecting factors.

Effects of Alloy Chemistry and Solidification Rate on the Mechanical Properties of an Al-9Si-1Cu Alloy for Powertrain Applications Daryoush Emadi,1,a, R.
Mechanical properties.
Mechanical properties of the bars produced by both casting methods are shown in Table 2.
Conclusions The casting and mechanical properties of an Al-9Si-1Cu alloy have been determined.
Iron can be increased without affecting pore nucleation or forming Al-Fe compounds that inhibit feeding.

The infill density plays a significant role in the printing time and mechanical properties of the printed objects.
They determined the optimal process parameters to achieve the desired mechanical properties of PLA structures.
[16] determined the mechanical properties of porous PLA scaffold for simulating bone properties.
Effect on infill density on mechanical properties of petg part fabricated by fused deposition modelling.
Mechanical properties optimization for pla, abs and nylon + cf manufactured by 3d fdm printing.

The influence of weld heat input on weld joint between B610CF and 16MnR steel using shielded metal arc welding method was investigated by metallographic experiment and mechanical properties experiment.
Weld thermal cycle affects micrographic structure and mechanical properties of weld joints.
Weld heat input is an important factor affecting weld thermal cycle[4].
In this paper, using shielded metal arc welding method, the influence of weld heat input on weld joint between B610CF and 16MnR steel was investigates by metallographic experiment and mechanical properties experiment.
So the impact toughness has little difference which can be demonstrated by mechanical properties experiments shown in Table 4.

The major influence of freeze-thaw damage is the mechanical properties of concrete including compressive, tensile and shear strength, elastic modulus and Poisson's ratio, etc.
There are two factors affecting the durability of concrete: from external view, are freezing speed and temperature, freeze-thaw cycles; from the internal perspective, are air-content of concrete, water-cement ratio, cement type and varieties of raw materials.
Guizhen Duan [3] summarizes the change rules of mechanical properties of the concrete after freeze-thaw damage, and analyses the main factors affecting the durability of concrete.
Conclusions According to the test results, the following conclusions can be obtained: (1) Mechanical properties including compressive strength, elastic modulus of concrete have significantly impact with the increase in the number of freeze-thaw cycles
The influence of freeze-thaw cycles on the mechanical properties of concrete [J] Journal of Civil Engineering, 1997, 30 (4): 35-42.

The Effect of Metallic Addition on Mechanical Property of Aluminum (LM6) Alloy R.
Most of the mechanical properties reported about cast Al–Si alloys are the outcome of tensile testing.
According to prior studies [7], impact strength is the most sensitive of all the mechanical properties to silicon content for alloy compositions containing 3–15% Si [6, 7].
In commercial Al–Si foundry alloys Fe forms brittle intermetallic compounds that have long been identified to be harmful to mechanical properties [8-11].
Further, entrapment of the sludge into the mould cavity has a harmful effect on the mechanical and physical properties of the casting part [16].