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Uniform Wearing Optimum Design of Extrusion Die Profile Leigang WANG a, Xianping SUN b and Yao HUANGc School of Materials Science and Technology, Jiangsu University, Zhenjiang 212013, China a lgwang@ujs.edu.cn, bsxp-16888@163.com, c huangyao64@hotmail.com Key words: Extrusion; Die profile; Wear depth; Optimization design.
Kim: International Journal of Mechanical Sciences Vol. 43(2001), p. 1507 [2] S.K.
Kim: International Journal of Machine Tools and Manufacture Vol. 40(2000), p.1457 [3] L Zou, J.C.
Materials Processing Technology Vol. 142(2003), p. 659 [4] S.B.
Kang: Journal of Materials Processing Technology Vol. 96(1999), P.53 [6] L.G.

Establishment of a Model of Growing Anodizing Film on AZ91D Mg Alloy Jiangang Qian a ，Chun Wang b , Di Li c, Yufen Liud School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083 , China a qianjg@buaa.edu.cn, b wangchun@mse.buaa.edu.cn, c lidi@buaa.edu.cn, d liuyu941@sohu.com Keywords: AZ91D Mg alloy, anodizing, Film-forming process, model Abstract.
They are ideal materials and are applied to a number of industries including aerospace, automobile and electronic communications
Guo: The Chinese Journal of Nonferrous Metals Vol.12(2002),p.32 [3] T.
Guo: Journal of aeronautical materials Vol.23(2003),p.109 [6] H.N.
Li: Journal of Chinese Society for Corrosion and Protection Vol.23(2003),p.286

Journal of Tianjin Polytechnic University, Vol. 27(3) (2008), p. 60-63
Polymer Materials Science and Engineering,Vol.20(6) (2004), p. 138-140
Polymer Materials Science and Engineering,Vol.20(11) (2004), p. 142-145
Natural Science Journal of Xiangtan University, Vol. 29(6) (2007), p. 95-99
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Materials and methods The study area is located in the north part of Suzhou city in northern Anhui Province, China, with its longitudes range from 117°45′00″ to 117°52′00″, and latitudes range from 33°37′00″ to 33°43′00″.
He: Journal of Soils Sediments Vol.8, 2008, p. 51–58
Li: Journal of Biology Vol. 27, 2010, p. 74-75
[7] X.Y.Chen,J.Yang,: Journal of Jilin University(Earth Science Edition) Vol.37,2007,p.326-330 [8] H.Q.Xie,G: journal of beijing vocational & technical institute of industry Vol.1,2002,p.28-30 [9] X.Y.Wang,J.Yang,H.X.Guo: journalof china coal society Vol.31,2006,P.808-812 [10] CEPA (Chinese Environmental Protection Administration): Elemental background values of soils in China, Environmental Science Press of China, Beijing, 1990
Bai: Ecology and Environmental Sciences Vol.14, 2005, p. 518-522

At this moment a wide range of nanomaterials is produced – oxides, carbides and nitrides, metals and alloys, carbon materials [3-6].
Heifetz, Composite materials production, in: Innovative Technologies, in: V.C.
Dyakov, The development of the electrochemical deposition process of nickel-diamond coating with phosphorus modified DND, Journal of Superhard Materials. 41(1) (2019) 43-48
Burkat, et al., A study of the process of gold plating from citrate and phosphate electrolytes in the presence of modified detonation nanodiamonds, Journal of Superhard Materials. 41(3) (2019) 167-177
Ushakov, How a crack and the defect material in its neighborhood affect the radiation strength of transparent materials, Journal of Optical Technology. 75(2) (2008) 128-131

Except fatty acids, the major constituent, which are very similar to those in olive oil, active materials such as camellin, camellia saponin, tea polyphenol and flavonoids in micro amounts are also existed in tea seed oil [2].
Materials and Method Seeds of white camellias were obtained from Huangshan area of Anhui Province in China.
The conditions of experiments are shown in “materials and method” section.
Salgm: Journal of Supercritical Fluids, Vol.39 (2007), p. 330 [7] V.
Huang: Food science and technology, Vol. 32 (2007), p. 139

Pappu, et al.: Journal of Materials Science.
Su, et al.: Chinese Journal of Materials Research.
Schneider et al.: Material Science and Engineering A.
Metallurgical and Materials Transactions A.
Vol. 26(1995),p. 2881 [12] M.A.Meyers, V.F.Nesterenko, J.C.LaSalvia, et al.: Materials Science and Engineering A.

Introduction When high-frequency magnetic materials are evoked, garnets, ferrites, and ferromagnetic materials usually come to mind, these iron-based materials exhibit a relative permeability that differs from unity.[1-3] Yttrium iron garnet (Y3Fe5O12, YIG) which is a kind of typical garnet structure materials and gyromagnetic materials is widely used in microwave communication devices such as circulators, gyrators and phase shifters due to its high resistance, small anisotropy constant, narrow ferromagnetic resonance, line width and low dielectric loss in microwave regions. [4] In recent years, with the rapid development of electronic communications technology, YIG material has been widely used in mobile communication and antenna radar system.
It is significant in practical application to tune the electromagnetic parameters of materials.
Acher, Copper vs. iron: Microwave magnetism in the metamaterial age, Journal of Magnetism and Magnetic Materials 321-14 (2009) 2093-2101
Hatakeyama, Permeability spectra of yttrium iron garnet and its granular composite materials under dc magnetic field, Journal of Applied Physics 110-5(2011) 053909
Zhang, Random composites of nickel networks supported by porous alumina toward double negative materials, Advanced Materials 24-17(2012) 2349-2352

Because of the extension of holding time, the grain size change of materials is more obvious.
[2] Xiao L., Chen D.L. and Chaturvedi.M.C.: Metallurgical and Materials Transactions A, 2005, 36A (10):267l
[3] Journal of Uiversity of Science and Technology Beijing, 2007, 29 (2):237
[6] Transactions of Materials and Heat Treatment, 2007, 28 (zl):176
[7] R.G.Appa, M.Srinivas and D.D.Sarma: Materials Science and Engineering A, 2006, 418(1-2):282.

(4) Denote by the velocity of the material and by the velocity of the mesh.
Material parameters of steel and soil are listed in Tab.1 and 2, respectively.
Acknowledgements: This work was financially supported by the National Natural Science Foundation of P.R.China under NSFC Grant No. 50205026.
Journal of Zhejiang University (Engineering Science).
Journal of Huazhong Agricultural University.