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Lim 2,c,* 1 Institute of Industrial Science, The University of Tokyo, Komaba, Meguro, Tokyo, 153-8505, Japan 2 School of Mechanical Engineering Sungkyunkwan University, 300, Chonchon-dong, Jangan-gu, Suwon, Kyonggi-do, 440-746, Korea a agassi12@hotmail.com, bkultra@skku.edu, cbslim@skku.edu *Corresponding author.
properties of a structure according to the different loading type and presence of a crack.
Also, the heat affected zone(HAZ) of P92 weldment and base metal were used for creep-fatigue tests.
Fig.2 shows creep crack length vs. time according to temperature change at the initial stress intensity factor of 25.5MPa√m.
The crack growth and void characteristics were measured according to the change of temperature and the initial stress intensity factor.

Gao Department of Mechanical Engineering, Zhejiang University of Technology Hangzhou, 310014, China Keywords: Photosensitive resin, SiO2 particles, Fractal distribution, Dicing blade Abstract.
Researchers have the common idea, on high molecular polymer material, that adding rigid inorganic particles can improve mechanical properties of polymer material [5-6].
Furthermore, the tensile strength of thin dicing blades is significantly affected by two factors, i.e. the quantity of SiO2 particles and their spatial distribution in the photosensitive resin.

The welding process produces a large microstructural gradient through the weld, resulting in strong variation of mechanical properties, for details see [1].
Parameter K defines the slope of a sudden drop of the load on the load-diameter reduction diagram and is often referred to as 'accelerating factor'.
The mechanical properties of the materials (BM, UM and OM welds) were determined on round tensile (RT) specimens with initial diameter of 5 mm (see Table 1).
Table 1 Mechanical properties of base metal and weld metals (OM and UM) at room temperature.
Initial value of void volume fraction f0 = 0.002 was adopted according to microstructural observations and recommendations for steel of similar properties given in [11-13].

Therefore the suspended structure requires the sacrificial layer material with excellent high temperature resistance, low residual stress, good mechanical property, withstand large strains and satisfy the experiment conditions.
Because the graphic is very small, the process of each step will directly affect the final result.
The following are the basic steps of patterning the sacrificial layer: (1) pre-imidization (2) spin coating photoresist (3) prebake (4) exposure (5) developing (6) wet etching (7) hardbake (8) removing the photoresist Fig.1 Non-photosensitive polyimide graphical process 2.2 The influencing factors in the wet etching (1) Effect of surface cleaning on glass substrate in a wet etching Pinhole phenomenon probabaly occurs when the substrate is not clean.
While heating time too long and too short will cause the exposure of poor sensitivity, precision, and affect graphical effect.
Y., Preparation and properties of LDHs/polyimide nanocomposites, Polymer, 2003, 44(4): 1151-1161

The experimental part of the investigation here presented will be mainly concerned to laboratory casting the above alloys and to assess their microstructure and properties.
When high wear resistance properties are required, the toughness of the carbides becomes another key factor to be considered [11].
The extremely high hardness of the metal matrix in Sample 5 can be related to the presence of finely distributed lamellar Mo2C carbides affecting measurements, as shown in figure 5.
Measured hardness showed promising properties since values higher than those of alloy A and comparable to alloy B were obtained (Table 3).
If dilution brought the composition to the hypoeutectic side, fine Mo2C appeared, rising up further the mechanical properties of the tungsten-rich metal matrix.

It has strong compression, shearing force, anti-permeability, and other good physical properties, the engineering characteristics depends on the joint role of coarse grains and fine grains.
The Main Factors of Affecting the Engineering Characteristics.
For mixture, close compaction need more ramming strike force, so we learn foreign experience and combine the domestic actual situation to choose appropriate mechanical tools.
Fig. 5 Ramming work Fig. 6 Rammered earth houses with mixture Conclusions In conclusion, the improvement of the traditional rammered earth construction technology should begain from the rational preparing materials, good gradation soil-rock mixture can significantly improve mechanical properties of rammered earth walls.
Study on Engineering Property of Coarse-grained Soils.

However, these techniques are difficult to apply to welds with rapid microstructural gradients because the stress-detection parameter is also highly sensitive to metallurgical factors.
Recently, an instrumented indentation technique that measures elastic/plastic deformation behavior beneath a rigid indenter as a curve of indentation load versus indenter penetration depth has been developed and applied to evaluate various mechanical properties such as contact hardness, elastic modulus [4], yield and tensile strengths, work-hardening index [5] and fracture toughness [6].
A multiple indenting procedure with three load-unload cycles at maximum loads of 98, 196, and 294 N was applied to the unstressed base metal to obtain the residual-stress-induced load shift and contact properties at different depth or load steps.
Results and Discussion Metallurgical boundaries among weld metal, heat-affected zone (HAZ), and base metal were identified by optical observation.
Contact properties evaluated from unloading curve analysis for unstressed base metal.

Citation & Copyright (to be inserted by the publisher) Structural and Magnetic Properties of Bottom-up Synthesized ZnFe2O4 Nanoparticles J.
Magnetic and magneto-optical properties therefore arise and are investigated by static measurements performed on individual particles solutions.
However, such applications are dependent on the structural and magnetic properties of the nanocrystals that generally differ from those of bulk materials [2].
The fitting quality is controlled by Rp, Rwp that are reliability factors and χχχχ², the goodness of the fit.
Summary Stoichiometric zinc ferrite nanoparticles have been bottom up synthesized and exhibit very peculiar properties.

Die premature failure seriously affected the normal production.
The changes of process variables like stress and temperature will affect metal forming behavior.
So, all factors possibly causing workpiece changes of heat and force during every forging step should be considered carefully in simulations.
From the simulation results, the equivalent effective stresses have achieved 1290MPa in most of region such as transition surfaces between the side surfaces or tip surface and even reached 1940MPa in local area. 5CrNiMo hot-work die steel has stable mechanical properties below 500 and yield strength is about 1220MPa, tensile strength of about 1290MPa [7].
All above factors finally result in the most of blow energy had been received by dies and cause the sharp increase of die stress. ②The small round radius of transition between inner tip surface and inner side surfaces of grinding tooth increases outflow resistance of metal.

Table 1 Physical and mechanical properties of soil Layer No.
Analysis of Factors that Affect the Deformation [12] Influence of Retaining Pile Rigidity.
(3) By changing the factors that affect the deformation and analyzing, we can conclude that the displacement of pile can be controlled by enlarging the pile diameter, but there is little economic effect when the pile diameter reaches a certain value.