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This paper analyzes the unstable factors of NC WEDM machining process causes, and put forward the corresponding treatment measures.
But the increase of pulse voltage amplitude, pulse width increasing at the same time will make the workpiece surface roughness increases, the metamorphic layer thickness increase, thus affecting the surface quality of the workpiece, and even the emergence of fault arc, the broken wire.
Therefore, can choose the material is hard and good conductive properties of materials ( such as hard alloy ).
At the same time, influence of electrode wire diameter on the cutting speed is also restricted by the pulse parameters and other factors.
Conclusion Through the above analysis, factors affecting the stability of WEDM machining is in many aspects, as long as we have targeted the elimination or reduction of the above factors on the dynamic stability of the electrode wire interference, can effectively improve the WEDM-HS machining.

Through analysis, it was pointed out that the key factor affecting the polishing quality of this system is the stability of the system.
Based on the property of MRF, a MRT was designed in this paper to provide stable and controllable torque for the compliant polishing tool system.
In a certain polishing process, as the coefficient K is a constant and the relative polishing velocity can be controlled by the DC motor, the polishing pressure becomes the most important factor affecting the polishing quality, and thus, a stable and controllable polishing pressure is certainly required.
In the process, the material properties of each component, appropriate constraints, loadings, and kinematic pairs were defined, and suitable solver was selected for the simulation of the virtual prototype.
Cui: Chinese Mechanical Engineering, Vol.20 (2009) No.5, pp.518-521.

But there are some unstable factors and self-compensations in this structure.
It was found that there are some unstable factors and self-compensations for Ag doped ZnO.
The incorporation of impurities can cause significant changes in the electronic structures of doped ZnO, which may affect its geometric structures and optical or magnetic properties strongly.
These factors increase the difficulty in creating holes in ZnO and can be viewed as a kind of self-compensation.
Optical properties of ZnO codoped with Ag and F.

The most affected areas are health and safety, agriculture, industry, transportation.
These both procedures will give the designer a view of the behaviour of the apparatus in real situations compared to a virtual testing which is not able to reproduce all the factors affecting it in real life conditions.
The different foundation properties show no measureable effect related to the barrier deformations.
Negligible leakages were observed, which did not affect the barriers function.
Ddraganovská, Study of the structure and adhesive properties of ceramic coatings prepared by plasma spraying.

The article describes the quality refractory materials, the main requirements for quality of lining bricks and chemical and physical wear factors, which influence the quality of refractory materials.
Basic external factors that affect the wear of refractory material can be classified into three basic groups: thermal effects (degree of overheating, thermal shock, thermal fatigue,); mechanical effects (erosion, abrasion, socks, vibrations, mechanical fatigue,); chemical effects (hydration, corrosion, smelting, slag infiltration, desulphurisation, impact of alkali and furnace atmospheres,).
Chemical and physical wear factors During use, refractory materials are exposed to chemical and physical action of the environment [4].
The physical properties of the melt affect the process of corrosion of refractory materials in particular the viscosity, density and surface tension [5].
Some properties of CaCl2 are shown in table 3.

Investigating the factors of thermomechanical processing which exert the most significant influence on the structure and properties of a finished product is an urgent task.
Consider now the technological parameters that affect the structure, and hence the mechanical properties, of the steel after HTTT.
The complex influence of parameters tb.d. te.d. and tt on mechanical properties can be generalized in the form of nomograms.
Summary In the real world of HTTT, all of the above parameters affect the structure and properties simultaneously.
The most significant factors are time and temperature.

By studying the biological prototype of crack-resistance of plant lamina, we found that surface thermal fatigue crack is one of the main factors affecting the service life of hot work mould.
Introduction Owing to the long-time contacts with high-temperature material in service time, hot work die loads long-term alternating stress, and in consequence mould local surface produces crack and strength is destroyed, which affects the service life of die.
Leaf vein is composed of vascular bundles and mechanical organization, its structure and chemical composition is different from the thin-walled cells of mesophyll.
Plant lamina is a model of excellent mechanical properties and a perfect union with flexible and rigid.
Location 2 is convex edges top, this place easy to have transverse cracks as shown in Figure 4(b), which will affect the products surface quality.

Introduction In modern conditions of creating building materials with a preset technical and operational characteristic the regulation and use of the raw materials and their mixtures surface properties is a necessary factor.
Numerous studies have confirmed the important role of the particle size distribution, the properties surface nature and specific surface in the raw mix for regulating the physical and mechanical building materials characteristics [1–5].
An important role in changing the particles surface energy properties is played by mechanical activation [11–13].
The mechanical activation measure can be considered as the amount of accumulated surface energy in the form of defects in the crystal structure of quartz, affecting the activation energy of the chemical interaction reaction and the kinetic constants of the processes.
The maximum technogenic raw materials energy potential use, taking into account the surface properties of the particles, will later serve as an important factor in controlling the physical and chemical processes of phase and structure formation of binders during autoclave hardening to achieve the finished products’ required physical and mechanical properties.

Tensile properties, hardness profile, microstructure of the weld, heat affected zone and base metal were examined.
The present work investigated the microstructure and mechanical properties of laser welded semi-solid processed A356 aluminium alloy.
Mechanical Properties.
The mean values for mechanical properties of A356 at different heat treated conditions are presented in table 3.
There are three main factors which influenced mechanical properties of weld metal and heat affected zone.

However, the application of engineering ceramics is limited by two factors: low reliability and reproducibility, both of which are related to the toughness and brittleness of the material.
Y-TZP ceramics can be endowed with superior mechanical properties 3~5 times higher than common engineering ceramics through phase transformation toughening.
Different sintering methods and temperatures greatly influenced the mechanical properties of zirconia.
It indicates that the mechanical properties of the samples improved with the rising sintering temperature.
Effects of sintering temperature on mechanical properties of zirconia ceramics Sintering temperature (°C) Bending strength (MPa) Vickers hardness / (Kg·mm-2) Fracture toughness / (MPa·m1/2) 1400 721±46 1092±16 5.4±0.4 1470 1018±35 1235±13 7.3±0.3 Effects of different sintering processes on the properties of ceramics.