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· Class 1: the depth of the scratch is less than 20 µm (for bare materials), or the cladding layer has not been trespassed
For clad materials, the base alloy exposed after scratch removal shall be less than 5% of the total area of the part to be considered as class 2
Materials Science and Engineering: 527 (2009) 297–304
Materials Science and Engineering: A 2009, 500, 16–24, doi:10.1016/j.msea.2008.09.039
Effect of Scratches on the Fatigue Behaviour of an Al-Li alloy, Fatigue & Fracture of Engineering Materials & Structures. 17 (1994) 501–507

Introduction Metallic biomaterials such as titanium, Co-Cr-Mo and steel alloys are the common materials used for implants especially in dental and musculoskeletal fractures.
Raw materials were melted in a resistance furnace at 550oC and held for 5 min under argon gas atmosphere.
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Such knowledge will help identify forming materials and forming processes in which RP tooling can be implemented.
Rymuza [9] points out the usefulness of being able to use polymeric materials without lubrication in many situations.
As Yamaguchi [12] has stated, the coefficient of sliding friction of many polymeric materials against steel is directly proportional to the shear strength of the polymers.
Ahn, Measurement of anisotropic compressive strength of rapid prototyping parts, Journal of Materials Processing Technology 187–188 (2007) 627–630
Yamaguchi (Ed.), Tribology of Plastic Materials: Their Characteristics and Applications to Sliding Components, Elsevier Science, Tokyo, (1990).

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Kumai, Journal of Materials Processing Technology, 191, 1-3 (2007), 238-241
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Watari, Journal of Materials Processing Technology, 153-154 (2004), 42-47
Suzuki, Journal of Materials Processing Technology, 143-144 (2003), 895-900

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Acknowledgements This work was financially supported by the Educational Department of Liaoning Province Natural Science Foundation(2011325).
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[9]Gaofeng Wang, Yue Zhang:Yinchuan Academic Journal Vol.25(2)( 201 l),p,106-109

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However, Pb-rich materials such as PZT are harmful to the environment.
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Xu: Ferroelectric Materials And Their Applications (Elsevier Science Publishers B.V, North-Holland 1991)

Introduction Poly-lactic acid (PLA) is a biopolymer derived from chemical synthesis of lactic acid monomers, and has various commercial uses as a component in building materials, fibers and fabrics, furniture, electrical appliances, biomedical devices and houseware.
IPMP, IBMP, 4-EP and 4-EG are notoriously difficult to remove from wine, and winemakers have a limited portfolio of agents and materials that can be used to improve affected product.
Materials and Methods A red, commercial Merlot donated by a local winery was used as the base wine in both studies.
Pickering, Methoxypyrazine composition of Coccinellidae-tainted Riesling and Pinot noir wine from Germany, Journal of the Science of Food and Agriculture, DOI 10.1002/jsfa.6760 (2014)
Riesen, The evaluation of remedial treatments for wine affected by Harmonia axyridis, International Journal of Food Science and Technology, 41 (2006) 77-86.

At the same time, the zeolite 4A conforms to Langmuir and the Freundlich isotherm to the chromium ion's adsorption, the correlation coefficient respectively was 0.9997 and 0.9753, obtained the zeolite 4A to the chromium ion saturated adsorptive capacity was 50.25mg/L.Obviously, zeolite 4A as a new inorganic ions exchange material for the treatment of chromic wastewater, has the broad prospects for development.
Materials and Methods Reagents and materials CrCl3·6H2O, analytically pure, Shenyang Reagent Factory.
Kot; “Removal of mixed heavy metal ionsin wastewater by zeolite 4Aandresidualroducts from recycled coal flyash”,Journal of Hazardous Materials B,vol6,2005, pp.90-101 [7] Zhangshuai,Chenhao, “Fossilization beer waste yeast to Cr(Ⅵ) adsorption”, environment project journal, vol3.
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