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A STUDY ON FATIGUE CRACK PROPAGATION PROPERTIES USING THE X-RAY DIFFRACTION METHOD Md.
The tension test achieved according to ASTM E8 regulation, and Table 2 is showing mechanical properties of material.
Also, if striation spacing is longer, it means that predicted shot fatigue life and the striation spacing depended on repeated stress level, frequency, stress concentration factors and shot peening velocity.
Finally, we think that fatigue life increase is the factors and among various factors, can know merit of shot peening effect on the surface.
This cause is superior to do site mechanical properties of matter and is because crack propagation rate was gone fast.

Introduction For mechanical properties of ductile cast iron, hardness is about HB 143~217, but tensile strength is high (over 450N/mm2), so it has an effect of improving the tensile strength of gray cast iron: 300~350N/mm2max., and enhance the elongation percentage up to 20%, too, it comes to have an effect greatly replacing the existing cast steel properties.
This technique uses a mathematical tool of a table of orthogonal arrays and the technique of the signal to noise ratio to understand factors having a significant impact on experiment result and find the optimum condition.
Table 1 shows the material properties of the ductile cast iron (FCD500).
In addition, it was found that the selection of appropriate tool is a factor greatly affected by surface roughness Conclusion This study could get the following conclusion to select the optimum tool life through cutting length and surface roughness by applying Taguchi method for CBN quill design. 1.
An experiment was conducted using a Taguchi method table of orthogonal arrays, and it was found that tool and cutting speed were the greatest factor affecting the tool life. 2.

Mechanical properties (and sometimes physical) depend largely on the structure of the material.
High-temperature treatment means, that if the thermo-mechanical treatment is carried out at a temperature above the austenite recrystallization temperature and a subsequent deformation occurs at lower and lower temperatures, with reduction rates of about 30% and results in an improved ductility and plastic properties with little change of the strength properties.
Parameters of the hot rolling process were developed assuming that the size reduction rates is determined by the allowable pressure force range affecting on the roller.
The fine-grained structure has no influence on a phase composition of steel and should increase mechanical properties during subsequent cold plastic deformations.
These factors have led to the lack of a uniform structure fragmentation of the rolled material.

Results show that cold forming of foam material is restricted by many factors.
It offers a unique combination of properties such as low density, high stiffness, strength, and energy absorption capability.
At present most research about foam aluminum focus on the preparation technology, performance test, mechanical properties [3-7].
Foam aluminum has a good use value, but it is limited by the forming process and the physical properties changes.
[5] TianJie, HuShiSheng, Matrix properties influence on the mechanical behavior of foamed aluminum.

The load carrying capacity of columns is affected by their stability and cast-iron strength in compression and tension.
Introduction In the 19th and early 20th century cast iron was popular construction material for columns and beams (compressed part), utilising its favourable mechanical properties.
General framework of the uncertainty assessment for models of cast-iron columns with examples of influences affecting test and model results is given in Figure 1.
Properties of cast iron Cast iron is generally an alloy of iron, carbon and other elements.
Using Approach 1 [6], σc is obtained as: σc = χc × σ0.2 (3) where σ0.2 = nominal strength based on the stress-strain curve proposed in [7]; and χc = slenderness reduction factor obtained similarly as recommended in EN 1993-1-1:2006 [5] with considerations for specific properties of cast iron.

Laser cladding, as an effective method of metal surface modification, is to fuse an alloy coating of enhanced mechanical and chemical properties on the surface of a substrate.
The preparing processes, microstructures, properties and influence factors of laser clad cobalt-based alloys coatings and their ceramic particles strengthened composites coatings are analyzed systematically.
Laser cladding, as a newly developed rapid solidification technique, is to fuse an alloy coating of enhanced mechanical and chemical properties on the surface of a substrate [1].
Research Development Cobalt-based alloys possess the excellent high temperature wear and corrosion resistance and attractive mechanical properties at high temperature.
Laser clad cobalt-based alloy coatings offer excellent high temperature corrosion resistance and attractive mechanical properties at work temperature.

Stirring rate, temperature, pH value as well as mass ratio of shell and core are the main parameters affecting the stability of microcapsules.
Melamine-Formaldehyde resin can be used as the wall material for its thermal stability and nice mechanical properties.0ur report mainly focuses on the process of microcapsules.
The interfering factors will be analyzed and then the best condition will be determined.
Results and Discussion The preparation of microcapsules is influenced by several factors.
Therefore, the factors influencing the condensation reaction of the MF resin also influence the formation of microcapsule wall, such as temperature, pH value.

The influences of the various factors on the mechanic properties of the specimens made by the powders were discussed.
The mechanical properties were measured according to the related Chinese National Standard.
(a)×8000 (b)×15000 Fig.5 SEM analysis of B-H7a Mechanical Properties and Water-resistant Properties of Specimens The two types of specimens (40mm×40mm×160mm) were manufactured from the superfine powders activated with different activation methods and their compressive strengths were measured immediately.
The mechanical properties of the specimens manufactured from the six types of superfine powders are shown in Table 3.
The constant temperature period has a great impact on the properties.

Each edge of mould was welded two row bolts, and its bottom surface laid the PTFE sheeting for its low friction property.
Simplified mechanical model and numerical simulation Steel ring test method The combination of the steel ring and concrete ring constitute a complicated mechanical counterbalance system.
The phenomenon was caused by the great difference between physics property of the two rings, such as, the elastic of concrete is 15% of steel ring.
Though, the constraint condition by the rigid frame affect by many experiment factors, the paper discussed theoretically and contrasted on the constraint shrinkage.
However, because the mechanical properties of material are varying widely, the maximum value didn’t locate in the contact surface and in the 1/4 thickness of concrete ring distance from the concrete-steel interface.

Since its discovery, a large number of researcher studied its rheological properties, adjusted mix design methods and analysed mechanical characteristics.
The rheological properties of SCC allow it to supply entirely and tightly a formwork of any shape under its own weight [7].
In this paper are evaluated the key factors affecting the cost estimate of concreting works: materials cost, the labour requirements, the formwork demands and the construction time.
Since its discovery was published a lot of researching concerning its fresh properties, mix design, mechanical characteristic.
[17] ERMCO (European Ready Mixed Concrete Organization), Guidance to the engineering properties of concrete, 2006