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Introduction In aerospace industry applications, weight and material properties are critical factors.
Usually, the joint microstructure consists of a heat affected zone (HAZ), a thermo-mechanically affected zone (TMAZ) and a stir zone (SZ).
Results from FSW of aluminum MMC’s show increase of weldability in comparison of conventional welding methods and report an increment of mechanical properties of the SZ with respect to the base material due to a more homogeneous distribution of reinforcement particles, Si eutectic phase and less casting voids [6].
Xil, Properties of High Reinforcement Content Aluminum Matrix Composite for Electronic Packages, Journal of Material Science: Materials in Electronics, Vol. 14, Issue 1, pp. 9 – 12, (2003)
Azizieh, Evaluation of microstructure and mechanical properties in friction stir welded A356+15%SiCp cast composite, Materials Letters, Vol. 60, Issue 4, pp. 565 – 568, (2006)

The stress, temperature, time and environment are the factors which can cause changes in their metallurgic structure and contribute to acceleration of degradation processes.
The stability of nickel-base superalloys and their ability to resist the destructive effects of overheating or long time heating are important properties in gas turbines applications.
Summarizing and evaluating the mechanical properties and microscopy analyses structural results the improved creep deformation ability of exposed specimens points out that additional carbide precipitation along grains boundaries and in grains interior appeared not to be such detrimental considering the alloy intergranular embrittlement.
The revealed evolution of alloy microstructure can considerably affect the creep properties of exposed specimens and it is most probably the reason of large differences of the time to fracture and of the deformation ability of alloy in dependence on the prior thermal exposure at relatively low temperature.
Conference on the Mechanical Behaviour of Materials ICM8, Victoria, B.C.

Introduction The most commonly used die cast magnesium alloy is AZ91 which has good combination of castability, mechanical properties and corrosion resistance [1, 2].
For improving the mechanical properties at elevated temperature, rare earth elements were added [4].
The main aim of SSM process is to obtain small rounded globules in order to improve the thixotropic behavior and the mechanical properties of the alloy, therefore refining of the globules becomes very important.
Ebert, "Magnesium Properties-Applications-Potential", Materials science and engineering A, 302, 2001, pp. 37-45
Mabuchi, "Effects of Ca addition on the microstructure and mechanical properties of AZ91 magnesium alloys", Journal of materials science, 36, 2001, pp. 3035-3040

Such material has unique physical-chemical properties.
Nanometer blocking agent composed of inorganic nanometer material, high-efficient dispersing agent and reaction rate control agent[6] is capable of a diameter at nanometer level (1-100 nm), high specific surface area and chemical properties with uniform grain size.
Mechanism of flooding by using nanometer microemulsion fluid is complicated and is affected by a large number of factors such as wettibility of rock surface and change of oil-water interfacial viscosity or rheology.
During flooding, loss of surfactant is one of the key factors affecting cost of microemulsion fluid flooding.
The experiment and research show that, mechanical and electromagnetic performances of nanometer synthetic material in individual directions differ greatly.

During all these processes, the major mechanical positions of the main unit structure showed in figure 2(b).
The draw ratio of rollers mainly affects the inflexibility,the bigger the draw ratio is, the worse the inflexibility is.
Based on the above-mentioned factors, the average velocity of calendering is 43m/min during the calendering process.
The speed ratio of this machine is mostly related to calender method and material property.
The Intermittent Mechanism Design and Application of Innovative [M].BeiJing：Mechanical Industry Press，2008.

Structure Optimization of Variable Pitch Helix End Mills Based on FEM Simulation Panling Huang1,2,a, Jianfeng Li1,2,b and Jie Sun1,2,c 1 School of Mechanical Engineering, Shandong University, 250061, China 2 Key Laboratory of High Efficiency and Clean Mechanical Manufacture (Shandong University), Ministry of Education, 250061, China a hfpl@sdu.edu.cn, bljf@sdu.edu.cn, csunjie@sdu.edu.cn Keywords: Variable pitch; helix end mills; FEM simulation; structure optimization; ABAQUS Abstract.
Chatter is one of the main factors that affects the manufacturing quality and limits the productivity during milling.
Material Property of Mills.

Differential speed rolling, by which shear deformation can be introduced throughout the thickness, was thus shown to be a promising process for improving the physical and mechanical properties of rolled and annealed aluminum alloy sheets by texture control.
Introduction The crystallographic texture of a sheet metal has strong effects on its mechanical properties, especially on its plastic anisotropy.
Control of the microstructure and texture is thus an effective tool for improving the mechanical properties.
If a deformation process other than rolling were to be employed in the manufacturing process, a new orientation distribution that would improve the mechanical properties could be attained.
Many factors, such as the direction of the second pass, pass schedule, annealing condition and alloying elements, will affect the development of shear texture.

Attributed to different elastic properties of the grain orientations, different slopes in the elastic region are observed.
Nevertheless, it is generally accepted that at low strains, the twinning behaviour can be explained by the shear stress criterion (Schmid factor).
The formation of twinning also requires multiple slip preceding the formation of twins [6] and mechanical twins were observed in γ-<111>//L at both low and high strains [5,6,8].
On the other hand, the same authors did not find twins in the γ-<200>//L orientation at low or high degree of plastic deformation, which was explained by its low Schmid factor for twinning but high Schmid factor for slip.
Mechanical twins have been proposed to affect the plastic behaviour through “grain refinement effect” or dispersion strengthening.

Zhu The School of Mechanical Engineering of Dalian Jiaotong University, Dalian,China 116028 The School of Mechanical Engineering of Dalian Jiaotong University, Dalian,China 116028 wwwjun-dlut@163.com, zhujingt@djtu.edu.cn Keywords: Abrasive Waterjet Engineering Ceramic Technical Parameter Machining Quality Abstract.
They are energy parameters ( water pressure, water nozzle diameter, abrasive flow rate, nozzle traverse speed ); material parameters ( cutting material properties, abrasive particle size and hardness ); shape parameters ( abrasive jet nozzle diameter, target distance ), [3].
The abrasive nozzle diameter does not affect the material removal volume.
Conclusion For each kind of processing method, we should consider not only the processing efficiency of it, but also consider it the processed surface quality, both factors of economy, practicality and so.
Chinese Journal of Mechanical Engineering. 2002, 15:73一78.

The calcination temperature affects their size, crystallinity, surface area, and other properties.
The calcination temperature affects their size, crystallinity, surface area, and other properties.
The reusability of gas sensors can vary depending on several factors, including the sensor technology, design, and applications [29-31].
Structural and electrochemical properties of the proton/γ-MnO2 system. 
Effect of sintering mechanisms on mechanical properties of AA7075/B4C composite fabricated by powder metallurgy techniques.