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Combination of extrusion and artificial aging to strengthen AZ80 magnesium alloy De Liang Yin a, Xin Chen b School of Materials Science and Engineering, Nanjing University of Science and Technology Nanjing, 210094, China a d_l_yin@163.com, b coolcoolcxcx@163.com Keywords: magnesium alloy; extrusion; artificial aging; toughness Abstract.
Acknowledgements This work was financially supported by the Research Funding of Nanjing University of Science and Technology (NUST) under No. 2010ZYTS090.
Baker: Magnesium and Magnesium Alloys, (Materials Park, USA 1999) [2] H.
Vol. 54 (2006), p. 4247 [5] K.N.Braszczynska-Malik: Journal of Alloys and Compounds Vol. 477 (2009), p. 870 [6] J.
Antolovich: The Science and Design of Engineering Materials (McGraw-Hill Company, Inc. 1995)

Yarlagadda: Journal of Materials Processing Technology Vol.130 (2002), p. 315 [3] F.
Shu: Materials & Design Vol.32 (2011), p. 1844 [4] A.
Miandoabchi: Materials & Design Vol.32 (2011), p. 414 [6] M.
Altan: Materials & Design Vol.31 (2010), p. 599 [7] R.
Liu: Journal of Materials Processing Technology Vol.125 (2002), p. 518

The viscosity of test materials was measured using viscometer at 25 o C.
The rheological property of tested materials showed pseudo-plastic behavior.
And the colors of tested materials were distinguishable from each other despite of having similar shades (A3).
The viscosity of test materials shows that all materials have pseudo-plastic properties.
Meyer: Porcelain-metal bonding in dentistry, Encyclopedia of materials science and engineering Vol 5 (1986), p. 3825-3830

Materials and Methods Samples manufacture.
Microstructure of studied materials was characterized on transversal and longitudinal cross-sections.
Acknowledgement Authors wish to thank the Czech Science Foundation (project no.
Čapek, et al., Highly porous, low elastic modulus 316L stainless steel scaffold prepared by selective laser melting, Materials Science and Engineering: C 69 (2016) 631-639
Kasperovich, et al., Correlation between porosity and processing parameters in TiAl6V4 produced by selective laser melting, Materials & Design 105 (2016) 160-170

The fixed carbon content of the coal is the carbon found in the material after volatile materials are driven off.
Oxford, Elsevier Science Ltd., 2002
[6] Journal: Oka, S.
Fuel Science.
[18] Journal: Tullin, C.

Because the materials usually flow in form of flexible solid in the pulping process, the Darnell-Mol's theory can be used in the analysis of the TSPE.
The flowing direction of material along reverse thread is opposite to that of material along positive thread.
Flow of Material Plug along Reverse Thread.
Acknowledgements This research is supported by the National Natural Science Foundation of China (Grant No. 50675155).
Dong: Journal of Tianjin University of Science & Technology Vol. 23(2008), No.3, p. 52 (In Chinese) [8] P.

Maki and Yoshida [1] studied the deformation of the wire when the profiled line was drawn, and the finite element method and the experimental analysis were used to compare the differences between the same section and differently materials.
Materials and Methods The materials selected in this paper steel SAE9254, the material properties are obtained by tensile test, the plastic flow stress curve is shown in Figure 1, the material properties are shown in Table 1.
Table 1 The material properties.
Todinov, “Maximum Principal Tensile Stress and Fatigue Crack Origin for Compression Springs”, International Journal of Mechanical Sciences, Vol. 41, No. 3, 1999, pp. 357-370
Ichikawa, “Shape Optimization of the Wire Cross Section of Helical Spring”, JSME International Journal, Series C, Vol. 36, No. 4, 1993, pp. 507-514

(2) The cutting temperature is very high, even up to 1000°C or more. (3) A poor tool life results from the high cutting temperatures. (4) Titanium has a strong chemical reactivity with most tool materials
Experiment Equipments and Materials.
Table1 Workpiece materials and characters Materials Ti-6Al-4V Chemical composition Al V O Fe C N 6.1 4.1 0.15 0.06 0.01 0.01 Mechanical characters σb [MPa] δ5 [%] ψ [%] 980 14 40 Cutting Experiments.
References [1] E.O.Ezugwu and Z.M.Wang: Journal of Materials Processing Technology Vol.68(1997), p.262-274 [2] S.Y.
Sun: International Journal of Machine Tools and Manufacture Vol.45 (2005), p.687-694 [7] R.D.

Syntheses of tabular cobalt ferrite crystal using non-equilibrium crystallization conditions Gang Jian a, Hui Shao, Qingxian Hu and Sheng Lu 1 School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, PR China agjian@just.edu.cn Keywords: Cobalt ferrite; tabular; non-equilibrium Abstract.
Magnetic materials’ properties such as magnetostrictive can be also enhanced by forming textured structures [17].
Hysteresis loop measured at 5 K (Fig. 7) took on a wide shape like hard magnetic materials.
Yao, Journal of the Chinese ceramic society. 37 (8) (2009) 1282−1287
Duan, Chinese journal of inorganic chemistry. 6 (11) (2001) 830−834

Residual Stresses Distribution Calculation of the Cu-Cr-Zr Alloy Contact Wire Used in High-Speed Electrical Railway Yong Liu1,a, Xinlong Liu2,b and Baohong Tian1,c 1School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471003, China; 2HEBI College of Vocation and Technology, Hebi 458030, China alyly2008@163.com, bhebi@open com. cn, cbhtian007@163.com Keywords: Cu-Cr-Zr Alloy Contact Wire; Residual Stresses Distribution; Crack Compliance Method (CCM); Prepared Process Abstract.
The existence of this stress will not only reduce the contact fatigue strengthen of materials, but also may induce stress corrosion at an appropriate environmental media, which will debase the employ-life of the contact wire.
Test materials and measuring principle Preparing tested materials.
References [1] Michael B Prime: Journal of engineering material and technology Vol. 123 (2001), p. 162-168
[7] Guoqin Huang, Hejie Chen, Hui Huang and Xipeng Xu: Advanced Materials Research Vol. 76-78 (2009), p. 125-130