Search results

Research on (Ti,Al)N Films Deposited by FCVA Youlong Zhou1,a, Zhou Chen1,b, Shengxing Ji1,c Nan Huang1,d 1School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, Sicuan, 610031, China aGarry1234@163.com, bYajo2006@163.com, c544834551@qq.com,dNhung@263.net Keywords: FCVA,　hardness,　XRD,　 friction coefficient Abstract: (Ti, Al)N films were deposited on high-speed steel (HSS) by filtered cathodic vacuum arc (FCVA) technique under a nitrogen atmosphere.
Introduction Material, structure and geometry are the three essential factors which decides the properties of cutters in traditional mechanical processing, and material plays the key role[1].
With the development of surface engineering technology, all sorts of new coating materials are researched and applicated.
Substrate material is high speed steel (HSS).
Journal of Lanzhou University(Nature).3(1998): 44～47(In Chinese) [5].　

Introduction Magnetic materials and effects are used for various sensing applications [1].
Magnetic field sensors cover a significant part of sensing applications of magnetic materials [2,3].
Hristoforou, Journal of Optoelectronics and Advanced Materials, 8 (2006), p. 1691 [4] E.
Darie: Materials Science and Engineering A, 304-306 (2001), p. 1011 [6] M.
Xenoulis, Gas Detection Sensitivity and Cluster Size, Nanostructured Materials, Vol. 10, No 8 (1998) 1355

The Finite Element Model is Established Establish Material Model.
Brass material properties of the experimental results as shown in Table 1.
By direct cell tube rotary increasing pressure pipe will have broken, this is not only a waste of raw materials, but also reduces the production efficiency.
Acknowledgements This work was supported by the High-end CNC Machine Tools and Basic Manufacturing Equipment Special Major Science and Technology Project (Grant No. 2011ZX04001-011).
[4] Jiang S Y, Ren Z Y, Xue K M, et al: Journal of Materials Processing Technology, Vol. 196, No. 1-3 (2008), p. 190-196

However, due to the complexity of the interface behavior between soil and pile materials, it becomes a problem in geotechnical engineering and it’s very difficult to obtain the analytical solution [1].
Therefore, in the pile soil interaction analysis, in order to reasonable simulate the complex interaction between piles and pile soil, the pile is using elastic material, but the soil is using ideal plasticity materials.
Fig.2 3-D FEM mesh of soil Fig.3 3-D FEM mesh of pile and Caps The materials and structure of the elastic-plastic deformation behavior is related with the loading and the deformation history.
This shown, t maximum stress of piles, bearing platform and soil were not more than the corresponding materials design strength.
[4] Renpeng Cheng, Guoqian Lang: Journal of Zhejiang University (Engineering Science), Vol.36 (2002), No.6, p668 (In Chinese).

†Corresponding author : nykim@kut.ac.kr Acoustic Impedance of Epoxy Coating Acoustic impedance is one of important acoustic properties of material that represents the ability to transport the acoustic energy in the material.
Since it depends on both of the material density and the ultrasonic velocity in the material, any change in material properties such as Young’s modulus and density leads to a change in acoustic impedance[3].
By detecting this variation of acoustic impedance, the material properties can be determined directly from the physical law relating the material properties to the acoustic impedance.
Acknowledgements This study is supported by the National Department of Science and Technologies as a part of mid and long term research and development programs.
Lee: Ultrasonic measurement of a sub-quarter-wavelength thin layer, Journal.

., Pohang University of Science and Technology, Pohang, Gyeongbuk, 790-784, Korea 2 GKSS Research Centre, Institute of Materials Research, Materials Mechanics, D-21502 Geesthacht, Germany 3 Centre des Materiaux, Ecoles des Mines de Paris, F-91003 Evry Cedex, France a dirk.steglich@gkss.de, bhusam.wafai@gkss.de, cjacques.besson@mat.ensmp.fr Keywords: Anisotropy, Plasticity, Unit Cells, Void Growth, Ductile Damage, Kahn Specimen Abstract.
For orthotropic material like rolled sheets, various yield criteria are available.
The material considered in the present study is a new member of the Al-Cu family.
Sauzay, "Anisotropic damage law of evolution," European Journal of Mechanics a-Solids, vol. 19, pp. 187-208, Mar-Apr 2000
Besson, "A yield function for anisotropic materials: Application to aluminium alloys," Int.

In this process each part of materials has prevented the heat dissipation, which is called thermal resistance.
The thermal parameters of LED packaging materials are listed in Table 1.
Thermal property of LED lamp packaging materials Material Ceramic substrate Cooper Sn solder paste PCB Thermal grease Heat sink (Al) k/ [W·（m·k）-1] 22.3 389 57 17.7 2.5 201 The supplied power is 2.5W, assuming the electro-optical conversion efficiency of 20%, so the heat flux applied on the thermal loading surface is 1.4´106 W/m2.
During thermal analysis, the thermal interface resistances between different materials are ignored, assuming that they are closely connected.
Study of an LED device with a honeycomb heat sink[C]，26th IEEE SEMI-THERM Symposium，2010: 289-298 [4] Jianzheng Hu, Lianqiao Yang, and Moo Whan Shin, IEEE TRANSACTIONS ON DEVICE AND MATERIALS RELIABILITY, Vol. 8 (2008), p:297 [5] Lianqiao Yang, Sunho Jang, and Woongjoon Hwang, Thermochimica acta, Vol.455 (2007), p:95 [6] Yanchao Liu, et al, Chinese Journal of Electron Devices, Vol.31 (2008), p:1716 [7] Jing Wang, and Fugen Wu, Electronic Design Engineering, Vol.17(2009), p:123

Metallic workpieces with uniform and fineequiaxed grain structures have a good combination of mechanical properties, which will influence machinability of materials.
Experimental Procedures Workpiece materials and grain structures.
The increase of strength of materials will increase cutting force, but the key point of questions is that what extent of grain refining can bring rising to cutting force, which is needed deeper research works. 1 2 3 4 5 6 0 200 400 600 800 1000 1200(a) Milling force,* Specimen number Main milling force Radial milling force 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 0 200 400 600 800 1000 1200 1400(b) Main milling force Radial milling force Milling force,* Average grain size,mm Fig. 2 The relationship between milling force with grain size of specimen (a) The testing results of main milling force and radial force (b) The variation of main milling force and radial milling force with grain size of specimen Fig. 3 Microstructure in as-cast workpieces of Inconel 718C (a) lengthened dendrite in specimen 1# (b) uniform equiaxed grains in specimen 5# In order to understand the relationship between the grain size and cutting force,
Technol. 77(1-3) (1998), p. 278 [2] Yuhua Xiong, Jun Du, Xiuying Wei, Aimin Yang, Lin Liu, and Daben Zeng, Metallurgical and Materials Transactions A, 35A(2004), p. 2111 [3] M.
Teo, Journal of Materials Processing Technology 63(1997), p. 199 [5] Yuhua Xiong, Aimin Yang, Yiping Guo, Wei Liu, Lin Liu.Science and Technology of Advanced Materials 2(2001), p.13 [6] Taiwen Huang, Lin Liu, Aimin Yang, Trans.

They have never been heard before in literatures from the view point of their utility as engineering material.
Due to environment and sustainability issues, there are a remarkable achievements in green technology in the field of materials science through the development of bio-composites.
The main advantage of using renewable materials is that the global CO2 balance is kept at a stable level.
Keeping this in view, a detailed literature surveyed has been carried out through various issues of the Journals related to this field.
The Impact test has been performed to assess the shock absorbing capacity of different material systems.

It set migration limits for 8 elements in toy materials.
Materials and Methods Plastic toy samples.
This producer aim to determine the leaching property of Pb in contaminated toy materials with different in vitro methods (including dilute-HCl, PBET method and IVG method).
In summary, for the eight detected metals (Pb, Cr, As, Cu, Ni, Ba, Cd, Sb) in the base materials of plastic toys , Pb, Cr, As can be mainly problematic.
Zhu, Conparison of three in vitro methods to study the bioaccessibility of soil lead and arsenic(in Chinese), Journal of Agro-Environment Science, 27 (2008) 414-419