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Introduction Metal corrosion under sea water environment is dependent upon not only the external environmental factors such as the temperature, chloride ion concentration, dissolved oxygen, and pH of the sea water but also other various factors such as the passivation characteristics and corrosion resistance depending on the chemical composition of the exposed material, the shape of the product, and type of the motion.
It also determines the microstructure and property of aluminum bronze depending on the content in the solid solution.
Hence, despite being the same material, the damage on the part affected by cavitation can be dependent on the galvanic corrosion damage effect to a certain extent, when forming micro galvanic cell on both the part that is affected by cavitation and the part that is not.
The types can be determined by the effect of synergism that is elevated simultaneously due to the material characteristics and the environmental factors [12-13].
Conclusion We investigated the corrosion resistance under cavitation and the electrochemically complicated environment of the ALBC3 that has excellent corrosion resistance and mechanical properties in sea water environment.

Lai 1 1 College of Mechanical Engineering, South China University of Technology, Guangzhou, China 2 School of Mechanical & Electronic Engineering, Guangdong Polytechnic Normal University, Guangzhou, China a xulanying20008@163.com, b byye@scut.edu.cn, cwuqiang20008@163.com Keywords: Drilling, Minipore, Coupled thermo-mechanical, Finite element simulation Abstract.
Introduction The classical hard-to-cut material-Austenitic Stainless Steel 1Cr18Ni9Ti has better mechanical property and corrosion resistance, so it is applied widespread in many fields.
This is a dominant factor of forming drilling chip.
The material of the workpiece is Austenitic Stainless Steel 1Cr18Ni9Ti, it's mechanical properties are listed in Table 2.
Some elements are staved or distorted because of inhomogeneous deformation, which affected precision of solution.

The results indicated that quench sensitivity and therefore the mechanical properties inhomogeneity in large plates or forgings can be predicted more accurately by the simultaneous combination of hardness and electrical conductivity measurements based on Jominy end quench.
Meanwhile, the depth of greater than 150 mm is achievable in the novel alloy, and hence it can be recommended to fabricate large section plates or forgings without compromising properties in the center of the part after a slow cool.
Introduction Al-Zn-Mg-Cu series Al alloys are widely used for structural applications in aerospace because of their specific mechanical properties, which are precipitation or age-hardenable [1-5].
Quench sensitivity of age hardenable aluminum alloys are dependent on various factors including alloy composition, processing, quenching type, quenchant media selection etc.
Summary Quench sensitivity and the mechanical properties inhomogeneity in large plates or forgings of 7xxx series alloys can be predicted more accurately by the simultaneous combination of hardness and electrical conductivity measurements.

Introduction The SMT (Surface Mount Technology) manufacturing process involves multiple factors of machinery and materials, with considerably complex and extensive variables.
Finally, factors and average values were adjusted to the target values, and sensitivity was calculated to determine the adjustment of factors.
After literature review and industrial interviews, this study identified 10 control factors and 10 fixed factors influencing the solder thickness of the soldering machine of the SMT process.
The FAHP method was employed to select the top five factors for two categories, as shown in Table 1.
Table 1 Analysis of controllable factors Factor DFij Range Current State Controllable factors Control factors A.

But these alloys have poor surface properties such as wear and corrosion resistance for many industrial applications.
The properties of these materials depend on the composition, relative proportions of the α and β phases, thermal treatment, and thermo–mechanical processing conditions [4, 5].
However, titanium and its alloys have found little use in mechanical engineering applications because of their poor tribological properties such as poor abrasive wear resistance, low hardness values and high coefficient of friction.
Corrosion Behavior of Laser Nitrided Titanium Alloys Corrosion resistance of materials depends very much on the properties of their surfaces that are affected by two major factors: (i) the degree of porosity in the surface layer; and (ii) the nature and composition of the surface layer [31, 32].
The corrosion properties of Ti-6Al-4V are strongly dependent on the surface conditions and chemical composition of the materials, which are affected by the surface treatment type and the laser processing parameters.

Chemical composition and mechanical properties are illustrated in Table 1.
In case of spot welding between similar steel sheets, i.e., STS301L, STS304L, SPCC, and SPCD, by similarity of electric, thermal, and mechanical properties, quantitative differences of welding conditions considering pressure (p), current (I), and current time (t) were not large.
In spite of different electric, thermal and mechanical properties, the difference of optimum welding condition was a little.
And, as shown in Fig. 3, amount of major compositions were changed in the border of spot welded lap joint between dissimilar materials, this is supposed due to the fact that new composition distribution by diffusion of each compositions was made in the joining interface of spot weld..Static failure was mostly occurred on the side of material that mechanical properties is relatively lower.
And by the many researchers, it has known that, considering material, the geometric factors, and welding condition on fatigue strength evaluation of spot welded lap joint, ∆P-Nf curves of Fig. 4 sensitively get their influences 5, 7) .

So mr has an important role in friction process, and it is the key factor to the design of self-lubricating material.
Al2O3 TiC CaF2 Fig.2 X-ray diffraction patterns of Al2O3/TiC/CaF2 The Microscopic Structural Design of Self-lubricating Ceramic Tool Materials When solid lubricant is added into the ceramic matrix, there is a contradiction between the content of solid lubricant and the mechanical properties.
In this case, the solid lubricant hardly contributes to improving the frictional performance, and the solid lubricant in matrix, which is like impurity, has great influence on the mechanical properties of the ceramic material
While, a large amount of added lubricant affects the strength of materials, and the mechanical strength of the material is low.
Assuming that ceramic powder is composed of equal diameter spherical particles, the particles' radius are R, and they are not affected by other factors ( such as the friction between spheres and spheres, spheres and mold and so on).Then the accumulation of the spherical particles with the same diameter are amenable to the theory of the most compact.

And as a kind of important micro mechanical transmission components, micro-gear has important application value.
Micro-gear is an important micro-part and has great potential application in mechanical transmission.
The microscopic effect can be shown in two aspects: the size effects of physics laws and materials properties[1].
DAI et al.[5] compared the forming processes of different injection materials such as ABS, PP and PC, including the main process parameters affecting the micro-parts quality such as injection pressure, mold temperature, injection temperature and filling time.
Table 3 Processing parameters of the material Manufacturer Ejection temperature [℃] MFI (230℃, 2.16kg) [g/10min] Glass temperature[℃] Melt temperature[℃] (recommended) Mold temperature[℃] (recommended) Omsn 145 53 100.69 190-270 20-50 Results and discussions The dominated injection factors are examined and adopted among these parameters, such as melt temperature, mold temperature, injection time and packing time.

The results of work on the study of the chemical-mineralogical composition and physico-mechanical properties of the medium-fractionation products of the waste heaps processing with reference to the production of various wall ceramics products are presented.
Their role is shown as a polyfunctional additive when introduced into ceramic masses and affects the properties of finished products.
This tendency is primarily due to economic factors, producing materials with technology observance and low cost.
These rocks have certain plasticity and cohesive properties.
Such rocks do not have any plasticity and cohesive properties even after additional reduction process.

This paper performs a numerical investigation of a micro-electro-mechanical-system (MEMS) based capacitive viscometer.
First, the fluid property of the polymer solution is estimated using relaxation time estimation.
Introduction Viscosity is one of the important physical properties of liquids.
Since the viscosity of a liquid can vary according to other physical properties such as temperature and pressure.
The flow type of polymer solution Till recently, fluid dynamics has been very difficult to simulate due to its complexity, and one of the factor is the unknown flow types.