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The process having unique advantages like material properties remains unchanged, development of heat affected zone and stresses are eliminated as occurred in laser machining and stamping process, low tool as well as tool changing cost, capability of machining variety of materials with complex profile.
The findings are used for the manufacturing of micromesh used in fire alarms due to superior properties of SS-430 as mesh material. 2.
SS-430 is having wide applications due to high corrosion resistance, biocompatibility, better mechanical properties, a wide range of applications and compatibility with photochemical machining process.
GRA system is used to represent the grade of correlation between two sequences so that the distance of two factors can be measured discretely.
L27 orthogonal array considers all possible combination for three factors and three levels during experimentation.

There a lot of factors that frequently cause damage on aircraft wings, which often remains invisible on the surface.
Present designs of aircrafts use large safety factors to account for possible impact damage, which makes them heavier and more expensive.
There are two main types of damage that occur most frequently in aircraft wings: concentrated damage in the form of a crack, which might be due to collision and external factors and distributed damage in case when damage has spread to cover a part of the wing [1].
The material properties of the volumes can be altered individually.
Van Overmeire: Mechanical Systems and Signal Processing, vol. 16(4), (2002), p.637

Strength Properties and Microstructure of Sandcrete Blocks Incorporated with Maize Straws Samson O.
This research investigates the strength properties of sandcrete blocks incorporated with maize straws.
The material constituents, their mix proportion, the inclusion of admixtures and the production process are important factors that to a large extent, affect the physio-mechanical states of the sandcrete blocks.
Since mechanical properties rely on materials microstructure, discrepancies observed in the hollow sandcrete blocks’ microstructures account for differences in the compressive strengths presented in Figure 3.
Neville, Properties of concrete, 5th ed., Pearson Education Ltd, London, (2011)

Modification of the mechanical properties of SiC through doping is a potential pathway for improving resonator performance.
The modification of the dopant density provides a promising pathway to modify the temperature coefficient of frequency (TCF) to optimize the Q-factor for acoustic resonators.
These defects affect large areas of the surface and extend above and below the epi-surface by a few micrometers.
These samples exhibited up to 20 nm steps by AFM, which could be removed with a chemo-mechanical polishing finish.
In future work the SiCOI layers will be fabricated into BAW resonators and characterized to determine if their inherent material properties enhance the resonator performance metrics.

The results of research into the thermal phenomenon that occurs during the abrasion process comprise a highly important element among the factors to be taken into account in the overall study of the process.
In general terms, the thermal properties of steel, i.e. specific heat capacity (Cp) and thermal conductivity (K) are properties that depend closely on temperature [3].
We introduce and then discuss the non-linear properties of Cp and K.
Thermal Properties Thermal properties K and Cp are functions that depend on temperature.
Figure 4, shows the difference between the temperature fields of a simulation carried out with constant thermal properties in comparison with a simulation using variable properties.

Surface Modification and Preparation of High Purity Nanometer Magnesium Hydroxide Using Impinging Stream Jianhai Zhao 1,2，a, Yanping Lai 3,b 1Department of Environmental and Municipal Engineering, Tianjin Institute of Urban Construction, Tianjin, 300384, China 2 Tianjin Key Laboratory of Water Quality Science and Technology,Tianjin, 300384,China 3Department of Energy and Mechanical Engineering, Tianjin Institute of Urban Construction, Tianjin, 300384, China aemail：jhzhao@tjuci.edu.cn，bemail：laiwei@tust.edu.cn Keywords: impinging stream; surface modification; magnesium hydroxide Abstract: High purity nanometer magnesium hydroxide is produced by impinging stream reaction crystallization method using bischofite as feedstock.
Effects of operation conditions on the impinging stream of Mg (OH)2 are reported and the control factors of purity are confirmed.
Results and discussion Morphology and purity of nanometer magnesium hydroxide Nanometer magnesium hydroxide synthesized by impinging streams reaction crystallization were distinctly characterized according to their sizes and morphologies, which are strongly affected by the initial reactant concentrations, reaction temperature, impinging streams rate.
Such high contents affects negatively the rheological and mechanical properties of the composite, such as increasing melt viscosity, reducing elongation at break and impact strength[9].
Although the effect of functional groups on the surface properties of the particles is not clearly understood, the characterizations of magnesium hydroxide after surface modification as the flame retardant are favorable to reduce the loading level, increase the flame-retardant efficiency and improve the compatibity of Mg(OH)2 and polymer matrixes．

Controlling the heat input during welding to maintain the mechanical properties is of special importance for fine-grained high-strength steels [17].
FKM guidelines provide mean stress correction factors for welded joints [22].
Base and electrode metal properties are given below.
Material Specimen base metal (BM) and electrode material mechanical properties are given in Table 1.
Material properties BM and Electrode Mechanical properties Material Hardness, [HBW] Yield, [MPa] UTS, [MPa] Elongation 5d, [%] Base Metal MARS 600 600 1450 2150 10 Electrode ER307L 200 400 650 35 2.4.

Introduction 30CrMnSiNi2A steel is a kind of low-alloy ultra-high strength steel with superior properties, which is widely applied in aricraft landing gear, wing and engine shell as well as high strength connectors manufacture.
It has been paid great attention to by many scholars who carries a large number of experiments to investigate its mechanical properties [1, 2].
Cutting speed, feed per tooth, cutting depth and cutting width were investigated as four factors, and +1, 0,-1 stands for the high level, normal level and low level, respectively.
Cutting force regression results can be described as following: (4) As the cutting force fluctuates along the tool path during milling process because of each cutter tooth interrupted cutting, there is a huge impact on the specimen, vibrating tool, specimen and the whole process system, seriously affecting the surface quality of specimens.
Among above four parameters, feed per tooth was the major factor impacting surface roughness while cutting width was the minor factor in milling process, so the influence of rest parameters attracted discussion.

The optical properties of surface roughness are functions of its statistical parameters, i.e., the standard deviation of the heights of surface microprofile points from the centerline σ, the correlation interval α, and the average angle of inclination of the microfaces of the rough surface γ.
Taking into account that α0 = αэ, а , we obtain the following equation to calculate the coefficient σ0: , (3) The coefficient σ0 represents a quantitative estimate of the similarity of the optical properties of the surface of both the test sample and the reference samples.
Therefore, the angle (8º) should not affect the measurement results.
The following factors negatively affected the stability of measurement results: - Foreign flare light; to eliminate distortions in the readings of the recording device and the source and receiver of the lighting should have been in an optically sealed housing
- Incorrect alignment of the photodiode and laser; the deviation of the reflected beam from the calculated direction significantly reduces the stability of measurements Experimental Results The exclusion of these factors allowed us to achieve fairly stable results.

Ultrasonic machining has a great potential for applications in precision machining of ceramics, but still need to study the structure and properties of the work material [11].
The mechanical and thermal properties of Aluminum nitride ceramic shown in Table 2.
Levels of independent variables Fig1.Central Composite Design (α is 1.414) Factors Coding of Levels -1 1 Spindle Speed, V (rpm) 10000 20000 Feed rate, f (mm/min) 10 30 Table2.
Analysis of variance (ANOVA) was carried out to investigate which parameter significantly affected the surface roughness.
Based on ANOVA table both factors spindle speed and feed rate are influencing the surface roughness, feed rate is the most dominant factor.