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Preface With the current development of materials science and engineering, many different cost-effective and high-quality materials have come into use in various applications.
Thus, this volume of the journal Materials Science Forum presents to readers the 2nd special issue from the series Current Advances in Materials Applications, which contains articles covering different aspects of the research the properties of the materials and methods their applications.

An Investigation on the Microstructure and Mechanical Properties of Mg-3Al-1Zn Alloy via Spray Forming Yongbing Li 1,a, Hua Cui 2,b, Jinfeng Huang 1,c, Yuanhua Cai 1,d, Zihan Wang 1,e and Jishan Zhang 1,f 1 State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing, 100083, China 2 School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China a lybustb@126.com, fzhangjs@skl.ustb.edu.cn Keywords: Magnesium Alloy;Spray-Forming;Dynamic Recrystallization;Mechanical Property.
Introduction The greatest advantage of choosing magnesium alloys for engineering designs lies in its low density, which translates into higher specific mechanical properties.
It is imperative to improve the poor mechanical properties of magnesium alloys via refining its microstructure with advanced preparing technologies[1,2].
Materials Science Forum, Vol.419-422 (2003) , p. 43
Materials Science Forum, Vol.475-479(2005), p. 2789

Materials Science Forum Vols. *** (2004) pp.736-740 online at http://scientific.net Ó 2004 Trans Tech Publications, Switzerland Approach to the Improvement of Laser Cutting Accuracy for Laminated Solid Manufacture by Dynamic Compensation G.
Liu 1,b 1 Mechanical Engineering School, Tianjin University 300072, China a tju_wanggang@eyou.com, b mennie@eyou.com Keywords: Laminated solid formation, Laser cutting, Dynamic compensation, Neural network Abstract.
The dynamic compensation module is composed of inverse dynamic model and Materials Science Forum Vols. *** 737 inverse velocity controller model.
The rules of updating the connecting weights are expressed as: )]1k(W)k(W[S)k(W)1k(W ij ij ij ij ij −−α+ηδ+=+ (4) where k: the kth learning process η: learning rate α : momentum term jδ :output error of node j q … … … … … … … … d1 d1 q & d1 q && di q di q && di q & d5 q d5 q & d5 q && d1 τ di τ d5 τ Materials Science Forum Vols. *** 739 This is a time-consuming supervised learning process.
deviation(minute) 0.5 200 150 1 1.5 50 100 100 150 200 deviation( mm) 50 0.5 0.75 0.25 Advances in Materials Manufacturing Science and Technology 740 References [1] G.

(SiC-BGSITs) Akio Takatsuka1, a, Yasunori Tanaka1, Koji Yano2, Norio Matsumoto1, Tsutomu Yatsuo1 and Kazuo Arai1 1National Institute of Advanced Industrial Science and Technology, Japan 2Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Japan aa-takatsuka@aist.go.jp Keywords: SiC, normally-off, buried gate static induction transistor, high voltage.
Forum 600-603 (2009) 1071
Forum 679-680 (2011) 662
Forum 645-648 (2010) 913.

Research on Cooperative Equipment Maintenance Technology Supported Platform Yong Xing , Xiaohu Chen Department of Equipment Management Engineering,Xi’an Resarch Institute of High-Tech, Xi’an ,710025 ,China 190243919@qq.com Keywords: Cooperative services; network cooperation; technology supported platform Abstract: To deal with problems of the front-line maintenance staff in technology support, a cooperative platform which is supported by maintenance techniques based on knowledge service is put forward.
The platform employs distributional data base and cooperative service pattern to make all connected sections or departments (including equipment management departments, maintenance departments, engineering design departments, manufacturing departments, scientific research institutes, and so on) operate collaboratively in the same platform.
Characteristics of knowledge service and collaborative service Knowledge service.Knowledge service refers to refining the knowledge from resources of the overt and covert information according to people’s purposes aiming at solving problems in the advanced process of the information service.
It mainly consists of system management, interactive electronic technology manual, technology support forum, E-mail system, fault knowledge base, cooperative technology supported center and so on.
Within the platform, clients are able to share and exchange the maintenance information from equipment management departments, user departments, engineering and designing departments, supplying departments, manufacturing sectors, maintenance departments and training departments, and solve equipment failures in the field together with relevant departments and experts.

Behavior of Basal Plane Dislocations and Low Angle Grain Boundary Formation in Hexagonal Silicon Carbide Yi Chen1,a, Govindhan Dhanaraj 1,b , William Vetter 1,c , Ronghui Ma2,d and Michael Dudley 1,e 1 Department of Materials Science and Engineering, Stony Brook University, Stony Brook, NY, USA 11794 2 Department of Mechanical Engineering, University of Maryland Baltimore County, Baltimore, MD, USA 21250 a yichen1@ic.sunysb.edu, bgdhanaraj@ms.cc.sunysb.edu, cwvetter@ms.cc.sunysb.edu, d roma@umbc.edu, emdudley@notes.cc.sunysb.edu Keywords: Low angle grain boundary, Basal plane dislocation, Dislocation dipole Abstract.
TSDs are shown to strongly interact with advancing basal plane dislocations (BPDs) while TEDs do not.
Fig. 1 shows examples of how advancing BPDs are pinned by TSDs.
Forum Vol. 353-356 (2001) p. 727 [3] M.
Forum Vol. 457-460 (2004) p. 371 [7] D.

The green houses’ value increase and the cost control may realize through the value engineering analysis.
The Value Engineering Theory Value engineering appears in the World War II, proposed by Miles of GE in 1961, and established the value engineering theory.
The value engineering is applied in numerous domains.
The key of application of VE is how to coordinate the fine construction quality with the increases of cost of resources, the fine construction quality with the environment load through the reasonable plan, design and the advanced construction technology.
The key link of Value engineering is the calculation of house function.

Materials Science Forum Vols. *** (2004) pp.677-681 online at http://scientific.net  2004 Trans Tech Publications, Switzerland Web Based Virtual Design of Dynamics of Roller Gear Cam System Y.Q.
Shi 1,d 1 School of Mechanical Engineering, Shandong University, P.R.China a yqzhou@sdu.edu.cn, btangw@sdu.edu.cn, czhh@sdu.edu.cn, dsdsbc@163.com Keywords: Virtual Design, Roller Gear Cam, Indexing mechanism, Dynamics, Simulation Abstract.
With great progress in advanced manufacturing technology, current research has turned toward the application of virtual design platform to design varied cam mechanism to meet the customized characteristics [1].
Materials Science Forum Vols. *** 681 Implements The task of the virtual design on the dynamics is to get the dynamic performence that approves of customer by adjusting the parameter of controller.
Peng: Chinese Journal of Mechanical Engineering Vol. 45 (1997), p. 1 [3] Y.A.

Journal of Computing in Civil Engineering. (2001), p. 27-34 [4] TRB,Potential Impacts of Climate Change on U.S.Transportation, Committee on Climate Change and U.S.
International Journal of Terraspace Science and Engineering.
Forum Vol 1-1(2009), p. 95-108
Advances in Climate Change Research, Forum Vol 2-1 (2006), p. 3-8
China Civil Engineering Journal, Forum Vol 42-3 (2009), p.76-80(In Chinese)

In these and many other commercial engineering applications, they can replace other materials, such as thermosetting matrix composites.
Composites were processed from produced towpregs by compression moulding using glass and carbon fibres reinforced polypropylene and polyvinyl chloride for common engineering applications and carbon fibre reinforced Primospire TMPR-120, which is an amorphous highly aromatic thermoplastic polymer developed by Solvay Advanced Polymers, for application in highly advanced markets [5-8].
Properties of raw materials used in towpregs for more advanced applications.
Conclusions A new prototype powder-coating equipment suitable to produce in good conditions towpregs for common and advanced engineering markets has been successfully developed and tested in this work.
Carbon fibre reinforced Primospire TMPR-120 towpregs were also considered envisaging advanced composite structural markets.