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Barkhausen noise method is affected by such factors as reliability, low accuracy, and sensitivity for materials.
They verified that crack and stress in materials could induce the rise of ultrasonic nonlinear properties.
Properties of GH4169 Superalloy Characterized by Nonlinear Ultrasonic Waves[J], Advances in Materials Science and Engineering, 2015, 457384:1-9
Research on nonlinear ultrasonic properties of tension stress in metal materials.
Journal of Mechanical Engineering. 52(2016)22-29.

Many experiments have been carried out with the aim of improving the mechanical properties of the AZ31B alloy.
Table 6: Mechanical properties for selected rolled and annealed then air-cooled samples.
However, still the mechanical tensile properties of Mg AZ31B are the same in both.
Table 8: Mechanical properties for selected rolled samples along different rolling directions.
Larger grains and dimples in the furnace cooled samples as compared to the air-cooled samples did not affect the tensile and hardness properties in very thin sheets. 6.

Second, the deposition temperature caused the changes of the deposition type such as debris, whiskers and films and these changes of morphology affect the various properties.
Silicon carbide whiskers have been widely researched since they are effective materials for the reinforcement of various composite materials with their outstanding mechanical and chemical properties [3,4].
Among these properties, the most important factor is the minimizing pressure drop since it is directly related to decreasing the energy efficiency of combustion engines.
It means that the deposition morphology affects not only the mechanical strength but also gas permeability.
After CVI process onto the porous Al2O3 substrate, the mechanical property was improved.

Table 1 shows the mechanical properties of [CW2]6 hybrid composite arrangement that presents in this project, where C and W are weaved carbon fiber and glass fiber respectively.
These properties were determined through ASTM D3039, ASTM D790 and D3171standards, for volume tensile, flexural and volume fraction properties.
A 2k factorial designs have been utilized in the experiment to study the joint effect of parameter factors on output, where k represent the number of factors.
The F-value of each factor at 95% confidence level are considered as significant factors to the surface roughness when the factor is higher than the statistical table value (F0.05,1,19 = 4.38).
Davies, “Flexural Properties of E Glass and TR50S Carbon Fiber Reinforced Epoxy Hybrid Composites,” J.

The application of magnetic fluids is concentrated in their properties in these areas, and liquid surface tension coefficient is an important physical properties.
We carried out a series of experiments to explore the factors including different temperatures and different volume of surfactant that affect surface tension coefficient for magnetic fluid, obtained the expression of magnetic fluid surface tension coefficient and the temperature or surfactant.
Considering the above two cases, the actual surface tension coefficient P should be the measured surface tension α multiplied by correction factor b, that is: P=α ´ b.
If we cannot tune to 000.0, we must adjust the mechanical zero point.
Figure 6 The curve of magnetic fluid surface tension coefficient and the addition volume of surfactant Conclusion We carried out a series of experiments to explore the factors including different temperatures and different volume of surfactant that affect surface tension coefficient for magnetic fluid.

However, one of the important factors in affecting them is that the feeding method has not been given due attention when researching on open source machines. 
The results show that layer thickness is the most important factor for width and thickness deviations.
In most cases, surface roughness is used as a technical requirement for mechanical products.
If this value is exceeded, the plastic filament will be bent, greatly affecting the plastic extrusion process, clogging the extrusion head and can lead to damage to the extrusion head. 
S., Parametric appraisal of mechanical property of fused deposition modelling processed parts. 

The tool selection is a complex and optimization process, it is affected by a number of factors.
Therefore, giving full play to the excellent properties of cutting tool and achieve desired cutting effect, we must choice reasonable tool according to the specific object.
In this experiment, we choose selection Cr12MoV steel as the workpiece material, which chemical compositions is seen in Table 1 and its mechanical and physical properties is shown in Table 2.
The size of the vibration directly affect the surface contact status between tool flank and workpiece which determines the precision surface of workpiece.
Conclusions Making measurement and analysis to cutting force, cutting force, cutting temperature, cutting vibration, machined quality and tool wear of high hardness hardened steel Cr12MoV (HRC65), we can get the following conclusions: Under this experimental condition, taking the factors of cutting force, cutting temperature, cutting vibration, machined quality and tool wear into consider, the results of the study show that: TiAlSiN is the most suitable for Cr12MoV (HRC65).

High speed cutting is an important means to improve the efficiency and the quality of machining mold steel, but the tool wear is one of the key factors restricting the increase of the cutting speed, leading to higher requirements for cutting tool materials.
The physical properties of workpiece material at room temperature are listed in Table 2[6].
And it changes the chemical composition of the material, which directly affect the mechanical properties and accelerate the tool wear in the cutting process.
[6] Metals handbook: Properties and Selection: Iron and Steels.
Ante: Mechanical and structural properties of various alloyed TiAlN-based hard coatings.

Introduction The use performance of the mechanical parts can be affected by their surface roughness to a great extent.
The good surface quality can be obtained by grinding which is a precision machining method, but it is difficult to obtain good surface roughness when the material with the properties of high hardness and high brittleness is machined[1,2].
The factors and levels table and the experimental scheme table are shown in table 2 and table 3 respectively.
Table 2 Factors and levels table Factor Level Grinding wheel rotation speed, n[r/min] Workpiece feed speed, vw[mm/min] Grinding depth, ap[mm] 1 2500 100 0.005 2 4000 200 0.01 3 5500 300 0.015 4 7000 400 0.02 Table 3 Experimental scheme for the influence of grinding parameters on surface roughness Sequence number Principal axis, n[r/min] Workpiece feed speed, vw[mm/min] Grinding depth, ap[mm] 1 2500 100 0.005 2 2500 200 0.01 3 2500 300 0.015 4 2500 400 0.02 5 4000 100 0.01 6 4000 200 0.005 7 4000 300 0.015 8 4000 400 0.02 9 5500 100 0.015 10 5500 200 0.02 11 5500 300 0.005 12 5500 400 0.01 13 7000 100 0.02 14 7000 200 0.015 15 7000 300 0.01 16 7000 400 0.005 Experimental Results.
Modern Grinding Technology, Beijing:Mechanical Industry Press, 2003, p. 175-178

The feedstock filament will have the desired mechanical thermal and rheological properties as desired for Rapid Tooling applications.
The mechanical and thermal properties of the composed material used for feed stock filament meet the flexibility, stiffness, and viscosity requirements of the FDM process.
From the compression test, it was confirmed that build direction was important process parameter that affects mechanical properties.
The mechanical properties like youngs modulus , tensile strength and yield strenth will be tested as per ASTM standards and the similar properties of P430 material will be compared to check the suitability of the new proposed hybrid wire in the FDM machine.
Sbarski, Thermo Mechanical Properties of a highly filled Polymeric Composites for Fused Deposition Modeling, Materials and Design 32 2011 3448-3456