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It is used to study the behavior of forming force under different wall thicknesses and materials for manufacturing tube.
The careful selection of materials is beneficial to controlling forming force.
This causes difficulties to constantly supply and maintain dies, and there is always the problem of waste materials.
Acknowledgements This work was supported by the National Science Foundation (No.50275063).
Li: Journal of University of Science and Technology Beijing, Vol. 30 (2008) No.1, pp.67-70 (In Chinese)

Materials and methods 2.1 Materials and reagents The α-Al2O3 with an average primary particle size of 30±5 nm was purchased from Aladdin Reagent Co.
Wu, et al: Materials Chemistry and Physics Vol. 91 (2005), p. 370 [8] A.S.
Kang, et al: Journal of Colloid and Interface Science Vol. 350 (2010), p. 530 [9] M.
Thomann: Journal of Applied Polymer Science Vol. 105(2007), p. 2963 [13] W.
Yang: Characterization and testament of polymer materials (China Light Industry Press, China 2008)

Materials and Methods Preparation of Heavy Metal Solution.
The powder materials were treated with an oxidizing agent which was 100 mL of 0.1 M H2SO4 and 100 mL of 0.1 M KMnO4 solution.
Journal of Water Sustainability, 2(1) (2012) 87–104
World Journal of Pharmacy and Pharmaceutical Sciences, 4(11)(2015), 1600–1610
International Journal of Environmental Science & Technology, 4(1) (2007) 67–73

The functionally graded materials (FGMs) were initially introduced as the thermal barrier material.
Gun'ko, Mechanical reinforcement of polymers using carbon nanotubes, Advanced Materials, 18 (2006) 689-706
Wu, Processing and properties of carbon nanotubes–nano-SiC ceramic, Journal of Materials Science, 33 (1998) 5243-5246
Elliott, Molecular dynamics simulations of the elastic properties of polymer/carbon nanotube composites, Computational Materials Science, 39 (2007) 315-323
Bolton, Molecular dynamics studies of the influence of single wall carbon nanotubes on the mechanical properties of Poly(vinylidene fluoride), Computational Materials Science, 68 (2013) 73-80

Etch Performance of KRF Excimer Laser Micromachining Characterization on Silicon Material M.Z.
This is because it is a versatile technique that can process an extensive of materials such as ceramics, metal, plastic and even semiconductors.
Madou, Fundamentals of microfabrication: the science of miniaturization: CRC press, 2002
Oh, "KrF excimer laser micromachining of MEMS materials: characterization and applications," Journal of Micromechanics and Microengineering, vol. 22, p. 015012, 2012
Xu, "Excimer laser fabrication of polymer microfluidic devices," Journal of Laser Applications, vol. 15, pp. 255-260, 2003

For well application in north of China, the optimal properties of phase change materials was screened out by comparing with the same adsorbing material – perlite in Lab conditions.
Nowadays, phase change materials applied in the building envelope is concerned word widely owing to its characters of phase change energy storage [4] [5].
Materials and Methods In this work, the perlite was selected as adsorbing material for its porosity, applicability and economy in building field, the composition of which was shown in Table 1.
[6] Hua Zhang and Yugong Xu, Journal of Hebei Institute of Architectural Science and Technology. 2005,21(1):27.
(In Chinese) [7] Ruijie Li, Lingwei Yang and Xiaolin Cao, Chemical and materials. 2010, (10):36.

For commercial success, the raw elements of the hydrogen storage materials should be of low cost, the synthesis process should be inexpensive and easily scalable.
In this perspective, cold rolling was investigated as a new means of producing nanocrystalline materials.
This work shows that cold rolling is a promising technique for synthesis of hydrogen storage materials.
Vasudevan et al., Materials Science and Engineering A 329-331, (2002) 362
Barandiaran, Materials Science and Engineering A 134, (1991) 1402

Materials and Methods Materials.
Gu, Materials & Design, 30, 4 (2009)
Zhuge, Construction and Building Materials, 37, (2012)
Amico, Journal of Composite Materials, 51, 2 (2016)
Lu, Journal of Applied Polymer Science, 103, 6 (2007)

Last but not least, the sluice of Shilianghe reservoir should be released on time to maintain a smooth flow and promote the circulation of materials thereby improving the water environment.
[2] BP Han: Journal of Lake Sciences, Vol. 22(2) (2010), p. 151-160 ( in Chinese)
[10] HY Sheng, ZM Yu, TC Han, etc: Journal of Lake Sciences, Vol. 22(2) (2010), p. 235-243 ( in Chinese)
[17] JM Deng, YJ Cai, YW Chen, etc: Journal of Lake Sciences, Vol. 22(1) (2010), p. 70-78 ( in Chinese)
[18] Y Li, LJ Xiao, QQ Lin, etc: Journal of Lake Sciences, Vol. 22(2) (2010), p. 227-234 ( in Chinese)

Materials of thermoplastic polymer used are Polyethylene (PE), Polypropylene (PP), and Polyvinyl chloride (PVC) by using welding wire like the three materials.
However, due to the advantages of polymer-based materials such as having high corrosion resistance, and excellent strength-to-weight ratio, many industries regularly produce polymer-based materials.
Polymer-based materials, both polymer-only and polymer-based composite materials, are highly susceptible to premature failure due to the formation of cracks and micro-cracks.
Using samples PVC, PP, PE materials with pipe shape.
Laxmana Naik, B.Yogesha, 2016, Processing Techniques of Polymer Matrix Composites – A Review, International Journal of Engineering Research and General Science Volume 4, Issue 3, May-June, 2016, ISSN 2091-2730357 www.ijergs.org [5] Md Shakibul Haque, Mohd.