Search results

Selective grain refinement is the potential application of friction stir processing which would produce microstructure gradient viz., nugget zone, thermo mechanically affected zone (TMAZ) and heat affected zone (HAZ).
Nugget zone contains fully recrystallized equiaxed grains, thermo mechanically affected zone contains grains which are partially recrystallized and the heat affected zone possess base material microstructure.
Thus the improvement in superplastic forming properties of 72% fine grain microstructure over the other proportions of coarse and fine grain microstructure hold great promise for commercial application of superplastic forming.
Kashyap, Effect of layered microstructure on superplastic forming property of AA8090 Al-Li alloy.
Bacon, “Mechanical Metallurgy,” McGrawHill Shoppenhangers Road Maidenhead Berkshire SL2 2QL UK 1988

Analysis of the mechanical properties of slewing bearings using finite element method Peng Li1, a, Min Wang1, b, Xiaoli Qi1, c, Jianyou Feng1, d, Xiaohui Liu1, e, RunqiuTang1, f, Wenying Zhao1, g 1School of Mechanical Engineering, Anhui University of Technology, Maanshan 243002, China askip000@163.com, b ustcwm@126.com, c qxllxw@ahut.edu.cn, d fengjy509@163.com,e jixie051liuxiaohui@126.com, f 597716245 @qq.com, gzhaowenying@163.com Key words: slewing bearing; finite element analysis; contact mechanics Abstract: Slewing bearings are the basic structural components widely used in construction machinery industry.
Mechanical properties of slewings bearing were originally analyzed using experience or simple analytical methods.
Hou [1] proposed hardness, hardened layer depth, radius of curvature and contact angle of raceway are the four most important factors affecting the quality of raceway.
Several structural and technical factors were found to significantly affect the load capacity of the slewing bearing studied [2].
Mechanical design and manufacturing (9) (2006) 56~58 [3] G.

Viscoelastic Properties of PVB Interlayer for Laminated Glass Structures Used in Building Reconstructions VOKÁČ Miroslav1, a *, HÁNA Tomáš1,b *, V.
This interaction depends on the properties of polymeric interlayers used in lamination process.
Interlayers exhibit the viscoelastic properties and temperature dependency usually described by the generalized Maxwell model and WLF model (Williams-Landel-Ferry).
For a reliable and economical design of laminated glass panels, the knowledge of interlayer´s mechanical properties used in these structures is fundamental.
The most important property affecting the stress-state and vertical deflections of perpendicularly loaded laminated panels, is the shear stiffness G of the interlayer.

By three standard tests the discrete element model is established to match the main mechanical properties of glass.
Tool rake angle is the most remarkable factor influencing on the chip deformation and cutting force.
Introduction Glass has excellent properties such as high strength, thermal resistance, corrosion resistance, wear resistance and lightweight.
Calibration of the DEM model In this paper, the compressive test, Brazilian test and three-point bending test are adopted to calibrate the particle properties in the model of quartz glass.
Material of tool tip and uncut material are both affected.

The mechanical properties and microstructure of the material have been found to play a significant role in the forming of micro-components.
In this work, the effect of mechanical property on the forming of copper micro-pins by the progressive forming process is highlighted.
This phenomenon could have been simply attributed to grain size effect but we believe that this is not conclusive as other factors are also involved.
The prior strain influences the material property which affects the deformation zone development.
More work is therefore needed to elucidate the parameters affecting the pin height after annealing.

The viscosity, density and saturation magnetic intensity are the critical factors to describe the unique performance of magnetic fluid which is characterized by fluidity and magnetization.
These three physical properties of kerosene based magnetic fluid have mutual relationship and affection.
Table 1 Consistency of forerunner solution affect on magnetic property of magnetic fluid Consistency(mol/L) 0.8 0.6 0.4 0.2 0.1 Magnetic property strong stronger strong weak weaker Effects of Molar Ratio between Reacted Solution.
Effects of Other Factors.
There are several effective parameters affects the physical properties of kerosene based magnetic fluid such as consistency of reacted forerunner, molar ratio between reacted forerunner, temperature, pH value and the dropping speed of reacted solution.

This paper mainly studied and discussed crawler walks the organization design principles and exercise stress analysis, summarized the influence factors of walking organization for the future, the design of the machine can achieve reasonable structure, safe and reliable, action flexible have laid a good foundation.
l Influence of the mobile mechanism adhesiveness caterpillar, remove soil properties, factors of caterpillar bearing length and width outside, main and mechanical weight, shoe thorn height and crawler supporting surface pressure distribution than.
l Increase mechanical weight can improve adhesion properties, especially in sandy soil.
In fact, caterpillar walk institution in machinery industry has been widely, the factors affecting its walk not only and mechanical structure and parameters, but also on the properties of soil and the ground have a close relationship.
(Mechanical Industry Press, Beijing, In Chinese, 2001)

Study on Mechanical Properties and Physical Properties of Copper Based Electrical Contact Materials Reinforced by CNT Zhongquan GUO 1, a, Haoran GENG 2, b , Shasha FENG 2, c 1 College of Materials Science and Engineering, Shandong University, Jinan 250061, China 2 College of Materials Science and Engineering, Jinan University, Jinan 250022, China a guozhongquan@163.com, bstrong422@163.com, cwater_bobic@163.com Keywords: Carbon nanotube, Electrical contact composites, Fusion resistance Abstract.
Some important mechanical properties and physical properties, including sliding wear property, electrical conductivity and fusion resistance, were investigated.
Its overall properties meet the requirements of electrical contact materials.
These factors attributed to the dramatic increase of the materials' electrical resistivity when the proportion of the CNT exceeded 8vol. %.
Effects of CNT on Friction and Wear Properties.

Introduction Titanium diboride has drawn great attention due to its refractory properties and high conductivities and extensive research activities have been done on the processing and properties of TiB2containing composites [1-6].
But it is not easy to study the evolution of nanostructure of the powders during spraying which is essential for controlling the structure and properties of the coatings.
Due to the low temperatures involved, cold spraying makes it possible to retain valuable properties of the powders.
The problem is in the preparation of an appropriate composite structure from the phases dramatically differing in mechanical properties.
So, in detonation sprayed coatings, the size of particles increased compared to that in the powders due to high temperatures involved, the mode of spraying greatly affecting the microstructure.

Polymerization of bone cement stabilizes the fractured vertebra by increasing its mechanical strength, thereby providing symptomatic pain relief.
Many factors affect the reaction of polymerization of polymethylmethacrylate and, therefore, the reaction rate and injection permeability of bone cement.
Polymerization of bone cement stabilizes the fractured vertebra by increasing its mechanical strength, thereby providing symptomatic pain relief.
Many factors affect the reaction of polymerization of polymethylmethacrylate and, therefore, the reaction rate and injection permeability of bone cement [4-6].
Ivarsson, Influence of temperature and vacuum mixing on bone cement properties.