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Failure Analysis of a Welded Aluminum Alloy Component in  High-speed Train Yonghui Zhu1,a,Wei Zhou1,b,Yuan Nie1,c, Zhongyin Zhu1,d,Hui Chen1,e , Guiguo Wang2,f,Jinpeng Yu2,g 1School of Materials Science and Engineering, Southwest Jiaotong Univesity, Chengdu 610031, China; 2CNR Tangshan Railway Vehicle Co.
Fatigue durability is one of the important performances of aluminum alloy materials.
The Chinese Journal of Nonferrous Metals.1997,7(1):69-74 (In China) [3] L.P.Borrego,J.M.Ferreira and J.M.Costa.Fatigue Crack Growth and Crack Closure in AlMgSi Alloy.Fatigue and Fracture of Engineering Materials and Structures.2001,24:255~265 [4] Youn.J.G,Kim.H.S,Geometric Effect on the Fatigue Properties of the Side Frame in a Hull Structure,Welding in the Word,1998,41(4):288~297 [5] Lazzarin P, Tovo R.
A Notch Stress Intensity Factors Approach to the Stress Analysis of Welds, Fracture Engineering Materials Structure, 1998,21:1089~1103 [6] Ballard P, Dang Van K.
Fatigue and Fracture of Engineering Materials and Structures. 1995,18(3):397~411

However, significant decrease in particle sizes are obtained in the materials milled at 100, and 200h.
Eason: The International Journal of Powder Metallurgy Vol. 29 (3) (1993)
Brookes: Hard Metals and Other Hard Materials.
Silva: Materials Science Forum Vols. 530 / 531 (2006), p. 322
Chinese Academy of Sciences, Shenyang, China, (1994)

Acknowledgements This work was supported in part by the National Key Laboratory of Science and Technology on Materials under Shock and Impact under funding No. 9140A13060110BQ03 References [1] C.
Zweben, “High performance thermal management materials” Advanced Packaging, 2006 vol.15, no 2, pp 1-5 [2] Łukas Ciupiński, D.
Heat sink Materials processing by Pulse plasma Sintering.
Advanced Materials Research, 59(2009) 120-124 [3] Tavangar R, Molina JM, Weber L.
Journal of Alloys and Compounds, 2009, 471(1/2): 93-97

Investigation on Friction and Wear Property of Al2O3-Sio2(Sf) / AZ91D Composite Guanjun Liu1,a, Xinhua Mao1,a Feng Tian1,a and Huirong Zhang2,a 1 School of Mechanical and Electronical Engineering, Henan Institute of Science and Technology, Xinxiang, Henan, 453003, China 2 Experimental center of Henan Institute of Science and Technology, Xinxiang 453003, China alguanjlgj@163.com Keywords: Al2O3-SiO2(sf) / AZ91D Composite; Aluminum Silicate Fiber; Wear Mechanism Abstract.
Introduction Magnesium alloy as a structure material has attracted more attentions because of its high specific strength and stiffness.
The wear test was performed with MM200 type friction-wear tester, and test surface of all specimens were polished with 1000# SiC waterproof abrasive paper. 20Cr steel with quench hardness of 53 HRC was used as material of the rubbing pair, which its boundary dimension isΦ45 mm×10 mm, and its working surface was ground to surface roughness of Ra of 0.8 μm. the ambient temperature was 18-20 Celsius degree.
Materials Science and Engineering A, Vol.372 (2004), p109–114
Journal of South China University of Technology (Natural Science), Vol.31 (2003), p62-65.

The research of hydraulic system anti-vibration and noise reduction Zhiyong He 1,2,a , Qinghua He 2,b ,Shanghong He1,c 1College of Automobile and Mechanism Engineering,Changsha University of Science and Technology,Changsha 410076,China 2College of Mechanical and Electrical Engineering,Central South University, Changsha 410083,China aemail, hezhiyong73@sina.com, bemail, romberg@sina.com, cemail, hshong@sina.com, Keywords: Pump circuit; pressure pulsations restraint; differential equation of vibration; coupling vibration; experimental research Abstract.
Oversight board shear deformation and rotating impact, the elastic thin plate transverse free vibration characteristics for differential equation is (1) Where is board of lateral deflection deformation, , D is bending stiffness, , ,,,, respectively is materials density,thickness,Poisson ratio,modulus of elasticity and natural angular frequency.
Acknowledgements This work is supported by the National Science Foundation (50875028), Hunan Nature Science Foundation (09JJ3087) and Hunan science and technology project (2010FJ3003).
JSME International Journal (B) , 1996, 39 ( 1) : 119 -124 [3] Huang, L.
Advanced Materials Research. 2010,139-141 (10):1040-1043

In order to characterize the flow strength of materials at high temperatures, several tensile tests were performed at temperatures from 800 to 950℃ and testing was accomplished utilizing strain rate change method to obtain the strain rate sensitivity.
Nelson, High temperature oxidation of steel in an oxygen-enriched low NOx furnace environment, IFRF Combustion Journal, 200602, September 2006
Zalar, Oxidation of AISI 304L stainless steel surface with atomic oxygen, Applied Surface Science 200 (2002) 94-103
Jenko, The oxidation of duplex stainless steel at moderately elevated temperatures, Materials and Technology 43 (2009) 137-142
Jiang, High-temperature oxidation of duplex stainless steels S32101 and S32304 in air and simulated industrial reheating atmosphere, Corrosion Science 52 (2010) 2846-2854

The Experimental Study of Lanthanum Bromide Detector in the Gamma ray Imaging ZHAO Cui Lan1, 2,a, LI Yong Ping1,b , CHEN Li Hong1,2,c , YUAN Chao1,2,d, QI Yu Jin3,e 1 Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China 2 University of Chinese Academy of Sciences, Beijing 100049, China 3Centre for Medical Radiation Physics, School of Engineering Physics, University of Wollongong, NSW 2522, Australia azhaocuilan@sinap.ac.cn, bliyongping@sinap.ac.cn, cchenlihong@sinap.ac.cn, dyuanchao@sinap.ac.cn, eyujin@uow.edu.au Keywords: Symmetric charge division circuit (SCD), Imaging detector module, FOA Abstract.
The performance of the detector module with the SCD readout was experimentally tested by a 57Co gamma-ray source. 2 Materials and methods Detector module .The detector module is composed of a LaBr3:Ce3+ crystal and a H8500 PSPMT.
Our study has shown that the detector module can provide good performance in both spatial and effective field-of-view and achieved the target of our radiation imaging prototype. 5 Acknowledgements This work was financially supported by the Instrument Developing Project of the Chinese Academy of Science（Y2010034） and the National Natural Science Foundation of China (11105209).
Inst. & Meth A (2007) [6] Information on http://www.rmdinc.com [7] XIE Jian-jun. et al., Journal of Inorganic Materials (2005) [8] GAO Xin, HE Yan-jin, Nuclear Electronics & Detection Technology (2010) [9] Wojcik R, Majewski S, Kross B et al., IEEE NSS-MIC Conference Record,( 2001) [10]Popov V, Majewski S, Weisenberger A G, IEEE Nucl.

Imprinted CS Membrane Using EGCG As Template CHEN Sheng1,a, LAN HuaXiu2,b, MA XiuLing2,c 1Fuqing Branch of Fujian Normal University, Fuqing 350300, China 2College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350007, China achensheng@fjnu.edu.cn bHuaxiu_lan@126.com cmxl502@163.com Keywords Chitosan, EGCG, Imprinted membrane Abstract A molecularly imprinted membrane was prepared in aqueous media using CS as functional monomer, EGCG as template molecules.
Experimental Materials Chitosan with N-deacetylation degree of 96.4% was purchased from Jinhu Chitosan Co.
Acknowledgements This work was financially supported by the Fujian Natural Science Foundation (2010J01025) and Fujian Education Department (JB09240 and JB11003).
Life sciences, 2006, 78(24): 2826-2832
Journal of Membrane Science, 2008, 322(2): 503-511

Materials and Methods Tested strains The tested pathogenic fungi are C. gloeosporioides and A. camellia provided by Forest Protection Lab of Central South University of Forestry and Technology Materials Eugenol(98%), Baicalein(98%) and Carbendazim purchased from Pesticide Co.
Journal of Central South University of Forestry and Technology, 2007, 27 (6): 179– 1821
Xi an: Shanxi Science and Technology Press, 1988
China Agricultural Science, 2002, 35 (7): 863 –866
Pesticide Science and Management 2002, 23 (5): 12 –15.

The reasons which trigger these facts do not match the theory are the unsymmetrical, machining error, piezoelectric ceramics pasting error, difference of the physical and mechanical properties of the material.
Driving voltage peak-peak value/V Speed/mm/s Fig. 8 Voltage-speed Curve X coordinate /mm Amplitude/μm Fig. 7 Amplitude Distribution of Upper and Lower Beam This test result is not the one with the optimal situation in next several aspects: ① directly driven by amplifier, some parameters of electronic driving and controlling system do not fit the device, for example: the resistance; ② there is no friction material on the contact surface, both of the materials are metal and the friction rate is not enough; ③ the parallelism of two moving contact surface (contact board) is not enough.
Acknowledge This work is supported by national natural science foundation of China (No. 51075195).
Reference documentation: [1] ZHAO Chun-sheng: The technology and application of ultrasonic motor (science press, Beijing 2007)
[2] HU Min-qiang, JIN long, GU Ju-ping: The principle and design of ultrasonic motor (science press, Beijing 2005)