Search results

Nanoscale cementite can be obtained in 0.17% carbon steel during isothermal treatment at 500oC after ultra fast cooling (UFC) and thermo-mechanical treatment.
The combined effect of Mn and Si on the above two stages are embodied in adjustable factors F2 and F3, respectively.
F3 is an adjustable factor.
The deviation comes mainly from the following two factors: the extremely small particles were overlooked during statistical analysis, the mean radius was calculated on the basis of two-dimensional TEM micrographs using Image-Pro Plus software rather than equivalent volume method which is more appropriate.
Dussoubs, International Journal of Microstructure and Materials Properties, 1 (2006) 197

A golf head CAD/KBE optimization design system Yung-Yuan Hsu Department of Mechanical Engineering, Chung Hua University, 707 Wu Fu Rd., Sec. 2, Hsinchu 30012, R.O.C.
We changed the CAD’s entity shapes and physical properties, integrated the optimal principle of design with a CAD solid model, to automatically drive the CAD solid model of golf iron heads according to the design objectives, and constructed a knowledge-based optimal CAD design technology.
The solid model of modern product design includes shape design of a free-form surface; surface shape is an important control factor in this design.
Fig. 3 shows how different values of a design variable affect the final location of grids.
In addition, based on the principles and concepts of how surface shapes affect the location of the center of gravity, the shape of an iron head’s cavity was redesigned, resulting in a surface with perturbation properties.

The properties of this type of artificial blood vessel - radical and axial tensile property, area of aperture gaps - are observed by an electron microscopy and analyzed to prepare for the further experiments.
Tensile property includes the radial tensile property and the axial tensile property.
However, a too large diameter may affect the mechanical property of the artificial vessel.
Tensile property.
The tensile properties of weaving tissue are much better than that of knitting tissue; besides, they have much more stable structure.

Physical and mechanical properties may also be affected by the sintering parameters, specially the type of catalyst/solvent [5].
Another important factor that could influence in all characteristics of a synthetic diamond is the addition, in a small proportion, of a dopant to the catalyst/solvent [5].
In fact, as reported by Shipilo et al. [8], changes in the composition and characteristics of the graphite to diamond transformation zone, affects the yield and size of crystals.
Conclusions · The addition of relatively small amounts of Zn, as a dopant to the reactive mixture of graphite and 40%Ni-60%Mn, as catalyst/solvent, affected both the productivity and the granulometry of synthesized diamond crystals at 4.7 and 1300°C for 10 min
Based in the experimental results, it is suggested that the presence of Zn affects the solubility of C in the molten catalyst/solvent alloy and interferes with the nucleation and growth of crystals

Introduction Since Hertzain first described the cone-shaped fractures produced in contacts between glasses lenses in the 1880s, indentation method has extensively used in the characterization of fracture and deformation properties of brittle materials [1-4].
The indenter was attached to the universal mechanical testing machine (CMT 5105, China).
Therefore, loading rate will strongly affect glass strength and cracking.
Time dependence of stress was a key factor affecting local strength measured by spherical indentation.
Therefore, the loading rate affected the local strength greatly. 2) the dispersion of glass bending strength data was discussed in terms of statistical fracture.

They concentrated on the factors related with the formation of pores, such as processing parameters and their combinations.
Compared to dense metal, porous metals have high functional and structural performance with the characteristic of low density, high surface ratio, less weight and good properties of damping.
They are widely used in fields of aviation, spacing, unclear energy, medical, environmental protection, metallurgy, mechanic, architecture etc, due to their excellent physical and mechanical properties.
That will both widen the application fields of porous metals and make their attractive properties to be fully used of [16].
The heat conductive coefficient is affected by several factors and can not be determined exactly.

Introduction Nano-Al2O3 with various properties has been widely investigated within years due to its stable properties under extreme condition [1], high resistance to corrosion [2], low thermal conductivity and so on.
The morphology and the particle size are key factors affecting the usage and application of the nano-materials.
Another substrate material copper alloy also has been used to prepare nanostructure Cu-Al2O3 powder, which exhibits strengthened mechanical properties [6].

Introduction More difficult machine materials have been developed with the advancement of both industry and technology due to their higher strength to weight ratio, heat resistant, tougher and hardness properties.
New advances in material science have produced high-tech ceramics, composite materials, and metallic engineering materials with excellent mechanical, thermal, and electrical conductivity properties that are well suited for spark erosion or electric discharge machining (EDM).
These research primarily focus on how the EDM process characteristics such as current, dielectric pressure, voltage, pulse on time, duty cycle etc., effect on machining properties like MRR, SR, Taper angle and TWR.
Perumal et al. [2] has conducted experiment on the basis of the Taguchi strategy approach to study the effects of machining factors like spark on time, discharge voltage and current.
Gugulothu [6] have been investigated on how process variables affect EDM of Ti-6Al-4V.

SSOS showed a good film-forming property when its concentration was 3%.
Research on properties and applications of SSOS has aroused increasingly more attention [1,2].
The mechanism is that when surface tension of the paper was less than external mechanical forces, some stuff like fiber fines, fragment, filler particles, sizing agent, and pigment particle were fell off the edge of paper under the action of mechanical force.
When the concentration is more than 5% starch solution had poor liquidity, which cannot form an integrated layer, and its barrier property and water resistance decreased.
The result indicated that the solid content and the DS of SSOS were two important factors that affect paper surface sizing performance of SSOS.

Milling cutter parameters are the important factors influencing the nozzle surface topology.
It has excellent heat resistant performance, which can better satisfy the need of property for the hydrazine thruster.
The main reason lies in that the nozzle throat has larger burrs than other section, which affects the measured results seriously. 4.
Rapid prototyping and testing of 3D micro rockets using mechanical micro machining[J].
Journal of Mechanical Science and Technology, 2006, 20(1): 85-93