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Effect of High-energy Ball milling to Powders on Microstructure and Physical Properties of Al-50Si alloy Lijun Zhanga, Jingpei Xieb, Aiqin Wang Materials Science and Engineering School of Henan University of Science and Technology, Luoyang, 471003, China aexceley@163.com; bxiejp@mail.haust.edu.cn Keywords: high-energy ball milling; Al-50Si alloy; physical properties Abstract: Al-50Si can be fabricated with a method in which air-atomization is followed by vacuum canning hot-pressing process.
The second is that this kind of alloy is the lightest one using in the electronic packaging materials which has excellent comprehensive.
As we know, the tensile strength of materials are decided by the size of the grains.
Proceedings of PRICM3 on Advanced Materials and Processing, 1998, Vol. ( 2) , p1681~ 1686 [3] German R M，Hens K F Johnson J L Powder metallurgy processing of thermal management materials for microelectronic applications[J]．International Journal Powder Metallurgy,1 994, 30(2)：205
Advanced Materials&Process es, 20003: 36-39

Introduction Now it is a tendency in material researches that scientists are trying to get novel clues from structures and functions of nature materials and to study new materials or improve the current ones inspired by these new views. [1] Coleoptera specie is one of the largest families in the animal kingdom, accounting for about 31%.
Materials and Methods Materials.
Material Science. 8(1973)618-623
Progress in Natural Science.16(2006)340-365
JSME International Journal, Series C.4,44(2001)260-262.

The Ce3+ ion is a well-known activator in luminescent materials.
Experimental Materials and Preparation.
[2] Guangyan Hong: Fundamental and Application of Rare Earth Luminescent Materials (Science Press, Beijing 2010)
Shankar: Chemistry of Materials, Vol.18 (2006), p.3314-3122
Hannah, et al.: Chemistry of Materials, Vol.20 (2008), p. 6277-6283

Materials and Method Preparation of Hydroxyapatite.
Advanced Materials Research, 1125, 474-478
Paper presented at the IOP Conference Series: Materials Science and Engineering
Applied Mechanics and Materials, 773-774, 287-290
International Journal of Bioscience, Biochemistry and Bioinformatics, 3(4), 306

These materials are hard to form due to these mechanical properties and hence the need to utilize the phenomena of superplasticity in forming these steels.
Micrograin superplasticity is shown by materials within the strain-rate range 10 -510-1 s -1 and at temperatures greater than 0.5Tm, where Tm is the melting point in Kelvin.
Sherby: Journal of Material Science, Vol. 13 (1978), p.2645 [10] J.
Marzban: Journal of Mater.
Weis and R.A Kot: Die-less wire drawing with transformation plasticity, Wire Journal, No.9 (1969), pp.182 [13] O.

Experimental Characterization of raw materials.
The characterization results of both materials are used as the basis for calculating the mass balance of the sponge iron smelting process into pig iron.
Recovery Fe = (massa akhir Fe x kadar akhir Fe)(massa awal Fe x kadar awal Fe) x 100% (1) Result and Discussion Characterization of raw materials.
Bansah, Chemical and Mineralogical Characterization of Ghanaian Foundry Slags, Journal of Minerals and Materials Characterization and Engineering. 11 (2012) 183-192
Sun, Formation Mechanism of Titanium Silicon Carbide: The Effect of Different Composition of Starting Materials, IOP Conference Series: Materials Science and Engineering. 214 (2017)

Interaction between erosive-wear and corrosion of alloy materials for hydroturbine in hydroelectric station[J].
Journal of Xi’an Jiaotong University, 2010，44(11)：66－70，118 ( In Chinese ) [ 2 ] Youxia Pang，Houcai Liu，Yuanjun Guo.
Chinese Journal of Mechanical Engineering，2002, 38(6)：123–126 ( In Chinese ) [ 3 ] Yu Xu，Yulin Wu，Wenjun Liu, et al.
Chinese Science Bulletin，2007，52(22)：2683 – 2687 ( In Chinese ) [ 6 ] Jian Li，Yongzhen Zhang，En’gao Peng，et al.
ASME Journal of Fluids Engineering，2002，124：617－624

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Color figures are welcome for the online version of the journal.
Mishing, in: Diffusion Processes in Advanced Technological Materials, edtied by D.
Clem: submitted to Journal of Materials Research (2003) [6] P.G.

Database System The database system is developed with Microsoft SQL Server and consists of five separate groups of data concerning workpiece materials, tool materials, cutting tools, cutting parameters and machining processes, respectively.
The first group (materials database) allows the user to select the workpiece material and its properties.
The materials database is made up of different material classes such as steels, cast irons and aluminum alloys, and within each group there are various materials.
The second group consists of tool materials types such as PCD, PCBN, ceramics, coated cemented carbines, etc.
Acknowledgements This project is supported by National Natural Science Foundation of China (No. 50105012).

Management Science.
International Journal of Physical Distribution & Logistics Management.
Shanghai University of Science.
China Management Science.
Management Science.