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In addition to the good mechanical properties in a lot of cases the good maintenance behaviour is an important decision criterion.
On the one hand, this passive layer gives these materials the corrosion-chemical properties of a precious metal.
Mechanical damages of finished products by e.g. scratches or coarse grinding increase the susceptibility against pitting and stress corrosion cracking.
Besides economic advantages the lean duplex steels also exhibit technical advantages as, e.g., higher strength, higher fatigue strength, lower tendency for cold welding, better surface properties for coatings.
The three factors that make up the Corrosion Resistance Factor (CRF) are based on a combination of practical experience, knowledge from recognised experts and research papers.

The loads on the arch dam and the materials physical properties of the dam and the bedrock are uncertain, and can be described with random variable.
As we all know, the arch dam is a higher order statically indeterminate structure, the temperature variation affect the dam stress greatly [11-12].
The statistical properties of the random variables are shown in Table 1.
Based on the calculation and analysis, the safety factor of the load combination of the dam is controlled by: weight, water pressure and temperature load rise.
(3) Clearly the temperature change random field affects the reliability of the arch dam in the reliability analysis.

Improvement of Solution Type Plasma Spraying Process Masami Futamata, Xiaohui Gai, Toyokazu Mizumoto and Kimio Nakanishi Department of Mechanical Engineering, Kitami Institute of Technology 165, Koen-cho, Kitami, Hokkaido, 090-8507, Japan, futamata@mail.kitami-it.ac.jp Keywords: solution type plasma spraying, hollow-cathode type torch.
The physical and mechanical properties that are different from usual thermal spraying coatings are described.
The construction of the resulting coating is affected by these factors. 3.2 HC type plasma spraying Figure 5 shows the patterns of a spraying coating made by an inside supplying trial HC type torch.
Kiyono: Titanium Oxide Physical Properties and Applications, Gihodo Shuppan Co., Ltd, (1997), p. 53

With the advent of high-power pulsed lasers, laser peening has emerged as a new and very promising technique to improve the resistance properties of materials to fatigue, wear and corrosion.
Introduction The use of high-power laser outputs for the generation of shock waves to improve material properties has been widely investigated since the 1970s [1-3].
With the advent of high-power pulsed lasers, LP has emerged as a new and very promising technique to improve the resistance properties of materials to fatigue, wear and corrosion.
In order to optimize laser peening parameters, it is necessary that the peak pressure P of shock wave induced by laser impacting on the materials surface should larger than the dynamic yield strength D ysσ under purely uniaxial strains in the peened materials, which depend on the mechanical properties.
These factors jointly improve greatly the service life of materials.

It has formed the power station boiler is different from other important features such as industrial boilers, namely the power plant boiler metal parts run time of the four important factors: time, high temperature, stress and medium.
Therefore, within the scope of boiler parts after a period of time after the operation, often there will be a failure, seriously affect the safety of the unit.
Power plant boilers when choosing materials, on the other hand, is based on the mechanical properties of the short-term material parameters and the long-term mechanical properties.
For example: overheating tube for a long time, its main card to analyze metal microstructure, cracking-off morphology; Circumstantial evidence and analysis of chemical composition, mechanical properties, etc., to rule out other causes, such as whether due to wrong with steel tube and so on. 6.3　A comprehensive understanding of the background of the accident, failure analysis, should attend all the analysis of the wreckage, select a representative sample.

The testing efficiency and testing accuracy of frequency are mainly affected by the environment and the function of instruments.
At the same time, by considering both model under the complex mechanical boundary or displacement boundary conditions, the analysis and solution of cable force are complex, and it is difficult to adapt to cable component with different characteristics in engineering.
The precision of cable force will be affected by parameters of stiffness, sag boundary conditions, gradient, temperature, and so on.
This is due to: the mechanical property of short cable with smaller tension are similar to the property of beam, the bending stiffness affects its frequency obviously, but when the tension becomes larger, the mechanical property of short cable is closed to the string’s property, the fluctuation of axial force leads the change of frequency, and the effect of bending stiffness is weakened; When the tension of long cable is low, its geometrical nonlinear is obvious, but with the growth of tension, the model approaches to string.
For some special cables, their material and geometrical size are irregular change, we can also use degenerated element to relatively simulate and analyze them with considering these factors.

Fiber is the material of increasing the strength properties and is the role of increased material stiffness.
We can use additives to improve the resin matrix of the physical and chemical properties.
They thought that the surface of FRP reinforcement size, performance, and cement filler pipe anchorage stiffness were important factors affecting the performance bond.
In order to better apply the FRP tendons in prestressed concrete, and many scholars started their own mechanical properties.
In the course of its durability, we found that the higher the fiber content, the higher the intensity of FRP reinforcement, and the better its mechanical properties and durability[28].

Based on the simplified model, seismic waves are applied at the bottom of bedrock, with the dynamic properties of soil and the interaction between ground and tunnel are considered.
Soil spring stiffness values are determined according to the survey report and experience, considering foundation treatment and rock properties of different tubes as well.
Free-field boundary field provides the same effect with the infinite region, which is to“enforce”the free-field motion in such a way that boundaries retain their non-reflecting properties-i.e., outward waves originating from the structure are properly absorbed.
From the perspective of internal forces, flexible foundation can improve the mechanical properties of the tunnel; however, the decrease of the foundation stiffness will inevitably lead to increases of the deformation of tunnel.
(4) Transverse Dynamic analysis of tunnel shows that, the connection parts of floor, wall and the connection parts of roof and wall are the most disadvantageous position during the earthquake, so, as one of the controlling factors in tunnel design these parts’ design strength should be strengthened and deformation control should be taken.

The braking simulation should include the mechanical braking, electric braking simulation, electric braking/mechanical braking coupling simulation function; meanwhile it allows to make the research on the braking simulation test of electric-braking/mechanical-braking coupling ABS (Anti-lock Braking System). 1.4 Performance test functions of wheel hub motor The wheel hub motor is the key part of electric vehicle; its performance determines the performance of electric vehicle directly; therefore the test on the mechanical property, efficiency property and other properties of the wheel hub motor is very important.
(2) Mechanical bench: all these factors, for instance the one if the principle of the mechanical part of the test bench is comprehensive and correct, and if the design is rational, will directly affect the comprehensive of test and the accuracy of experimental result.
Mechanical bench system 2.
The mechanical simulation is the flywheel 13.
(3) Electric/mechanical braking coupling simulation test When requiring to increase the braking force, the coupling effect of the electric braking and the mechanical braking is needed.

Introduction Stress-induced crystallization is a key factor affecting the mechanical properties of rubber.
The self-reinforcement of rubber is due to crystallized ability which is corresponding to the excellent mechanical performances.
The stress-induced crystallization related to IR good mechanical properties, especially at large deformation of rubber materials.