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Effect of Heat Treatment on Positron Annihilation Lifetime of an Extruded Al-12.7Si-0.7Mg Alloy Yanhui Zhang1, a, Dong Wang2 , Changshu He2, Xingzhong Cao3 , Lin Zhang1,b 1Institute of Material Physics and Chemistry, Northeastern University, Shenyang 110004, China 2Key Laboratory for Anisotropy and Texture of Materials(ATM), Northeastern University, Shenyang110004, China 3 Key Laboratory of Nuclear Analysis Techniques, Institute of High Energy Physics, CAS, Beijing 100049, China ayhzhang@imp.neu.edu.cn, blinzhang@imp.neu.edu.cn Keywords: Al-Si alloy, Extrusion, Heat treatment, Positron annihilation lifetime Abstract.
At present ninety-five present of Aluminum alloy extrusion is Al-Mg-Si alloy since the Al-Mg-Si alloy have high corrosion resistence, excellent welding properties, moderate intensity, easy to squeeze into a variety of complex hollow profiles, and the Al-Mg-Si alloys can be used as lightweight materials in buildings, vehicles, ships, containers, bridge guardrail, and so forth.
During superplastic deformation the materials will produce a large number of micro-defects, such as dislocation, vacancy and micro-voids and so on.
Material and methods A DC cast of the Al–Si–Mg alloy billet with 110mm diameter was produced.
China Patent 200810137603. 0, 2010 [4] Liu Fang, Yu Fuxiao, Zhao Dazhi, Zuo Liang, Microstructure and mechanical properties of an Al–12.7Si–0.7Mg alloy processed by extrusion and heat treatment Materials, Science and Engineering A. 528 (2011) 3786-3790

Through the incorporation of nanofillers in polymer matrices, it could enhance the partial discharge properties of the insulation materials.
The filler material is Aldrich S5130 silica fumed powder with a mean size of 7 nm.
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Nelson, Ed., Springer Science, 2010, p. 30
Xiaohong, Study on brekdown and paitial discharge of polyethylene/montmorillonite nanocomposites, International Symposium on Electrical Insulating Materials, 2008, pp. 597-600

The test materials were melted by a 25kg vacuum medium frequency induction furnace.
If the fracture condition was same, and the dimple size was large, the plastic of materials is well.
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[6] Longmei Wang: Journal of the Chinese Rare Earth Society Vol. 22(2004), p.48.
(in Chinese) [7] Liping Zhao, Jinfei Wang, Yonglin Ma and Baoping Xue: Journal of Inner Mongolia University of Science and Technology Vol. 28 (2009), p. 32 (in Chinese).

Materials and Method.
Construction and Building Materials Vol. 21 (2007), p. 1542-1551
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Zubir: Compressive Strength of Concrete with Recycled Glass as Partial Aggregate Replacement, Materials Science Forum Vol. 803 (2015): pp 21-25
Zubir: The Flexural Properties of Reinforced Recycled Glass Concrete Beam, Materials Science Forum Vol. 803 (2015) pp 325-329.

The majority of performance problems are related to shrinkage cracking and this cause accelerated materials degradation and premature pavement failure.
Another question of cement stabilized aggregate base materials is easy to be scoured by the water infiltrated into the pavement through cracks or openings [1].
Material Preparation Aggregate.
Performance tests on specimens mainly complied with the Test Methods of Materials Stabilized with Inorganic Binders for Highway Engineering (JTJ 57-94) of the Ministry of Communications of China.
Chinese Journal of Geotechnical Engineering, Vol. (24) 2002, p. 276 (in Chinese)

However, a substantial amount of experimental data shows that almost all geo-materials follow a nonlinear failure criterion in practice.
References [1] Yujie Fan, Qizhen Zheng, Lin Wei: Chinese Journal of Rock Mechanisms Engineering Vol.1(2005), p.2765-2769, in Chinese
[2] Siming He, Chenghua Wang: Chinese Journal of Rock Mechanisms Engineering Vol.23(2004),p.2966-2971, in Chinese
[3] Haibin Wang, Bo Gao: Chinese Journal of Rock Mechanics and Engineering Vol.24(2005),p.2113-2118, in Chinese
[5] Meifeng Cai, Manchao He, Dongyan Liu:　Rock mechanic　sand engineering(Science Press, Beijing 2002), in Chinese

The material characteristics are given in table 1.
Acknowledgements This work was supported by the National Natural Science Foundation of China (51175350).
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[8] Yu Shen Bo,Li Lei and Cao Shen: Applied Mechanics and Materials,vol.313-314(2013),p. 41-44
[9] M Amabili: Journal of Sound and Vibration,264(5) (2003),p. 1091–1125

Bhadeshia1,d 1 University of Cambridge, Materials Science and Metallurgy, Cambridge CB2 3QZ, U.K. 2 ArcelorMittal R&D Gent, OCAS NV, Pres.
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Conway 3 and A.Diwan 4 1Department of Chemistry, Materials and Forensic Science University of Technology, Sydney PO Box 123, Broadway, NSW, Australia 2007 2 Institute for Applied Bio Sciences, Ben-Gurion University of the Negev, Beer Sheva, 84105 Israel 3 Sydney Eye Hospital, University of Sydney, Clinical Ophthalmology, Sydney, NSW 2000, Australia 4 St.George Hospital, Orthopaedic Research Centre, UNSW, Sydney, NSW 2052, Australia b.ben-nissan@uts.edu.au Keywords: hydrothermal conversion, coral, Hydroxyapatite, sol-gel, mechanical properties, nano-coating Abstract.
Current bone graft materials are mainly produced from coralline hydroxyapatite (HAp).
Introduction Synthetically derived materials have been used as bone grafts in an attempt to overcome the limitations of autograft and allografts.
Materials and Methods Australia has rich variety of corals, however, their potential for use in implants has not been adequately investigated.
Lear, Journal of Foot and Ankle Surgery, 30 (1996), p. 396

Materials Science and Engineering: A, 2006, 426(1): 314-322
Journal of Materials Science: Materials in Electronics, 2003, 14(1): 9-12
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