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Introduction Friction Stir Welding is a solid-state process in which the parent material is plasticised due to heat input generated by friction between a rotating tool and the workpiece material and the plasticised material is simultaneously stirred into a mechanical joint by the tool as it rotates.
At a specific temperature, the material being welded will be optimally plasticised for that specific material and tool geometry combination in order to produce a good quality weld.
James, Characterization of the influences of FSW tool geometry on welding forces and weld tensile strength using an instrumented tool, Journal of Materials Processing Technology. 203(1-3) (2007) 46-57
Tang, Heat Transfer in Friction Stir Welding- Experimental and Numerical Studies, Journal of Manufacturing Science and Engineering. 125 (2003) 138-145
Withers, Friction Stir Welding of Aluminium Alloys, International Materials Reviews. 54(2) (2009) 49-93.

Liu: Materials Science Engineering A, vol. 527 (2010) No.26, p.7132
Kainer: Materials Science Engineering A, vol. 552 (2012), p.444
Yu: Materials Science Engineering A, vol. 528 (2011) No.3, p.961
Rao: Materials Science Engineering A, vol. 391 (2005) Nos.1-2, p.141
Mannan: Journal of Materials Processing Technology, vol. 202 (2008) Nos.1-3, p.201

Critical to acceptance of these materials is the ability to achieve high packaging strains without damage.
The ability to efficiently package these materials for launch without any damage is critical [4].
Mikulas: 42th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Confere, 2001-1419 (2001), p.1 [5] Y.
Du: Journal of Materials Science and Technology Vol.21 (2005), p.577 [6] Y.
Du: Aerospace Materials & Technology No.3 (2005), p. 31 (In Chinese)

Introduction Composite materials have been commonly used in many high-tech fields such as automobile industry, modern architecture, aeronautics and aerospace.
In the 1980s, Suquet [1] introduced the homogenization theory into plasticity to predict the macroscopic behaviors of ductile composite materials.
In order to generate macroscopic (homogenized) constitutive models for composite materials, a representative volume element (RVE) can be chosen to represent the periodic materials shown in Fig. 1.
This indicates that the fiber/matrix interface plays an influential role on the value of the transverse strength of the unidrectional composite materials when o 15ϕ> .
Mechanical characterization of SCS-6/Ti-6-4 metal matrix composite, Journal of Composite Materials, Vol.24 (10), 1990, 1029-59.

According to Science Citation Index Expanded and Social Sciences Citation Index Database in web of science, only 12 records were found in related discipline when “keyphrase extraction” as search title.
The World Wide Web has been widely used by enormous students for acquiring information, learning materials and references.
In order to find reliable and trustworthy materials, students must sift through the millions of pages available on the web, thus Kilbride J and Mangina E. (2005) describe a system designed to assist students of a web-based learning environment to achieve either acting autonomously or assisting users to create queries.
INTERNATIONAL JOURNAL OF INTELLIGENT SYSTEMS, 2010; 25(12): 1158-1186 [2] Wan Xiaojun, Xiao Jianguo.
Automated keyphrase extraction: Assisting students in the search for online materials.

Materials Science and Engineering: A, 419/1-2, 389 - 396, 2006
Journal of Manufacturing Science and Engineering 125, 138 - 145, 2003
International Journal of Material Forming.
International Journal of Material Forming.
Modelling and Simulation in Materials Science and Engineering, 7/17, 075001, 2009.

Yan: Materials Science and Engineering Vol.
Wang: Materials Science and Engineering A Vol. 478 (2008) ,P.208 [9] Z.W.
Li : Materials Science and Engineering A Vol.473 (2008) , P.166 [12] T.
Ma : Journal of Materials Science Vol. 36 (2001), P.5581 [13] Q.
Zhang: Journal of Materials Science Vol. 39(2004), P.667 [17] W.

The internal friction between FA and filling materials.
Then the damping potential of both of materials can be used adequately.
Materials Science and Engineering Vol .
Wegner, L.J.Gibson:International Journal of Mechanical Sciences Vol. 43(2001), p. 1061-1072 [5] YU Ying-hua, LIANG Bing: Materials for Mechanical Engineering Vol. 32(11) (2008), p.90-92, in Chinese [6] C.
HAN:Journal Of Materials Science Vol.33 (1998),p.1769-1775 [7] Huang Li: Polymer materials ( Chemical Industry Press, Beijing2005), in Chinese [8] Ledermen W.A:The Damping Properties of Composite Material(The University of Wiscomsin-Milwaukee, 1991), in Chinese [9] Wofenden A, Walla J M:Dynamic mechanical properties, Academic Press Inc(1991).

Excellent welds with low energy consumption and no braze material can be achieved.
In the engineering journals, such as Annals of the CIRP, Applied Mechanics and Materials, Manufacturing Engineering, Transactions of the ASME - Journal of Manufacturing Science and Engineering Journal of Materials Processing and Technology, can be found a large number of articles concerning to ultrasonic welding, which highlights the research timeliness in this field.
The material macrostructural and microstructural analysis were made for every working regime and compared.
The research intensification it is intended, in order to extend the ultrasonic welding applicability area on superior quality materials.
[3] Yi Jun Huang, Study on Design of Welding-Joint and Structure of Welding Based on Ultrasonic Welding Technology, 2011, Applied Mechanics and Materials, available at: http://www.scientific.net/AMM.101-102.871, accessed: 14.10.2013

International Journal of Selection and Assessment, Vol. 12 (2004), pp. 301-306 [2] E.
Journal of Environmental Systems, Vol. 30 (2004), pp. 308-310 [3] C.
B, Condensed Matter And Materials Physics Vol. 75 (2007), pp. 205206.2-205206.7 [5] A.
Journal of Xihua University Natural Science, Vol. 24 (2005), pp. 13-17 (In Chinese)
Journal of Chongqing University-Eng .Ed, Vol. 2 (2003), pp. 12-15