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The thermal process of welding mainly depends on the distribution form of external heat source, the thermal and physical properties of materials, heat transfer with the surrounding environment.
This method is also applicable to other materials, high-temperature thermal processing of numerical simulation theory.
Welding Journal,vol.85(12): 284s-291s
[3] Lei Yu-cheng, Li Cai hui , Yu wen-xia, e t a.l Numerical analysis on nitrogen protecting of TIG welding arc [ J].Journal of Jiangsu University: Natural Science Edition,2006, 27( 1) : 47- 50
Welding Journal,1996,75(4):1295-1345 [6] Goldak J.

Peng: Advanced Materials.
He: Materials Letters.
Walsh: Advanced Materials.
Walsh: Journal of Materials Chemistry.
Zhang: Materials Letters.

Electrochromic Properties of the Multicolored Polyaniline Nanofilms Ying Bai1,a, Xin Li2,b,* and Jianxin Du3 1,2Beijing Key Laboratory of Clothing Materials R&D and Assessment, School of Materials Science & Engineering, Beijing Institute of Fashion Technology, Beijing 100029, P.
China 3Beijing Institute of National Laboratory of Flame Retardant Materials Research, Beijing Institute of Technology, Beijing 100081, P.
Experimental Materials.
Akhmedov, Levent Toppare, Electrochromic properties of a copolymer of 1-4-di[2,5-di(2-thienyl)-1H-1-pyrrolyl]benzene with EDOT, Journal of Applied Polymer Science. 112 (2009) 1082-1087
[7] RAJIV PRAKASH, Electrochemistry of polyaniline: study of the pH effect and electrochromism, Journal of Applied Polymer Science. 83 (2002) 378-385.

Buchacz, Exact and approximate analysis of mechanical and mechatronic systems, Journal of Achievements in Materials and Manufacturing Engineering 33/1 (2009) 47-52
Dzitkowski, Modelling and synthesis of discrete – continuous subsystems of machines with damping, Journal of Materials Processing Technology 164-165 (2005) 1317-1326
Świder, Hybrid graphs in modelling and analysis of discrete-continuous mechanical systems, Journal of Materials Processing Technology 164-165 (2005) 1436-1443
Wszołek, Modelling of mechanical systems vibrations by utilisation of GRAFSIM Software, Journal of Materials Processing Technology 164-165 (2005) 1466-1471
Journal of Achievements in Materials and Manufacturing Engineering, JAMME, vol. 36/2 October 2009, p. 176-183.

Andrei (2006), Lightweight Magnetic Composites for Aircraft Applications, Journal of Optoelectronics and Advanced Materials 8: 726-730
Mangalgiri (1999), Composite Materials for Aerospace Applications, Bulletin of Material Science 22: 657-664
Collombet (2012), Study of Drilling of Multi-Material (CFRP/Al) using Taguchi and Statistical Techniques, Usak University Journal of Material Sciences Vol.2, pp 95-109
Karthikeyan (2004), Optimizing the Machining Parameters for Minimum Surface Roughness in Turning of GFRP Composites using Design of Experiments, Journal of Material Science Technology, 20(4), pp. 373-378
Machining and Machinability of Materials, 13(2/3), pp. 289-310.

Saewong2, b 1,2 National Metal and Materials Technology Center, Thailand Science Park, Klong Luang, Pathumthani, 12120, Thailand.
Hotza: Materials Letters, Vol. 57 (2002), p. 818
Leansuwan: Journal of Materials Science, Vol. 38 (2003), p. 4739
Saewong: Material Science Forum, Vol. 544-545 (2007), p. 605
[6] Chung Lun Lo and Jenq Gong Duh: Journal of Material Science, Vol. 38 (2003), p. 693

Reduction Kinetics of Bayan Obo Associated Iron Niobium Ore Fushun ZHANG 1,2,a, Zengwu ZHAO 2,b, Fang ZHANG 3,c, Naixiang FENG 1,d 1School of Materials ＆ Metallurgy，Northeastern University, Shenyang, PRC 2Inner Mongolia Key Laboratory for Utilization of Bayan Obo Multi-Metallic Resources: Elected State Key Laboratory，Inner Mongolia University of Science and Technology, Baotou 014010, PRC 3Material and Metallurgy School Inner Mongolia University of Science and Technology, Baotou 014010, PRC alnfushun@163.com, bzhzengwu@hotmail.com, czhangfang2006322@163.com, dtempmails@yeah.net Key words: carbon-bearing pellet; reduction mechanism; controlling step; kinetics Abstract:The mass loss rate of carbon-bearing pellet during reduction process was investigated at the temperature from 900 to 1050 ºC.
In order to full use of BayanObo resources, a process named continuous extracting niobium from hot metal was proposed by University of Science and Technology Beijing and Institute of Metallic Materials of Japan.
Experimental Materials In the experiment, associated iron and niobium ore was chosen as the niobium-bearing material, and its chemical compositions listed in Table 1.
The reduction process can be described based on porous material reaction model.
The Chinese Journal of Process Engineering, Vol. 16 (1995), p. 118-126 [12] CHEN xiangwu: Steel metallurgical physical chemistry, (The Metallurgical Industry Press)Vol.175-192(1990),p.2 [13] XU Rongjun, NI Ruiming,ZHANG Shengbi, MA Zhongting, CHEN Qibing:reduction kinetics of chromite pellet with carbon.Journal of Iron and Steel Research in chinese. vol.7(1995),p.1-5 [14] Rao Y.K.: Met.

Investigation on Recycled Cement Based on Waste Concrete ZongShou Lin1，a, Yan Chong2，b 1Key Laboratory of Silicate Materials Science and Engineering Ministry of Education, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, China 2Department of Materials Science and Engineering，Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, China azongshoulin@yahoo.cn byanchong006@163.com Key word：waste concrete；construction waste；recycled cement Abstract: Adding part of granulated blast furnace slag(GBFS), steel salg(SS) , Desulfurization gypsum(DG), we can use Waste Cencrete（WC）as the main raw materials to directly produce uncalcined cement by grinding.With mix proportion 40%~50% of WC and curing in water, the 3d compressive strength of the cement can reach 10MPa.
In this paper, we try to use wsate concrete that is grinded to produce uncalcined cement with granulated blast furnace slag, steel salg and Desulfurization gypsum, which will open up a new way of the recycling of waste concrete. 2 Materials and experimentals 2.1 Materials All raw materials were from China.
The chemical components of the raw materials are listed in Table 1.
Journal Of Wuhan University Of Technology. 2009; 31(4): 132-135
Cementitious Material Science[M].

Abstract Composite materials of POE-g-MAH, OMMT and PA6 were prepared by blending technology.
Experimental 1.1 Materials POE-g-MAH (CMG9805) was purchased from Shanghai SUNNY New Technology Development Co.LTD;OMMT (DK4) was supplied by Zhejiang Feng Hong clay chemical Co.
Thermo plastic Elastomer Toughened PP[J].Journal Harbing Univ．SCI. & TECH, 2003,8(2):81-84
Polymer Materials[M] .BeiJing: Chemical Industry Press,2007:128-130
Journal of Materials Science & Engineering,2003,21(6):927-930.

Materials and FE model properties.
Najafi: Science, Vol.254 (1991), p.1335－1342
Fritz et al.: Science, Vol. 288, No. 5464, (2000), p.316-318
Berger et al.: Science, Vol.276, No.5321, (1997), p.2021-2024
Yue et al.: Journal of Microelectromechanical System, Vol.13, No.2, (2004), p.290-299