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However, friction joining processes including Friction Stir Welding and conventional friction welding discover new merits to join new advanced materials.
These materials suffer from their brittle behavior to join, where sometimes weld cracking and porosity occur during fusion welding.
When conventional friction welding is used for joining new advanced materials, it can be solved weld cracking problems due to given compressive residual stresses on the joints.
Materials to be joined The 5000 and 6000 series aluminum alloy can be successfully fusion welded, but 2000 and 7000 duralumin alloys are difficult to fusion weld without the formation of weld defects such as solidification cracks and porosity.
Kobe JAPAN [2] T.Shinoda et al.: Welding International, Vol. 11(1997) p. 179 [3] T.Terasaki et al.: J. of Light Metal Welding & Construction, Vol. 38 (2000), No. 5, p. 528 [4] K.Aota et al.: Preprints of the National Meetings of Japan Welding Society, No.64 (1999) , p. 156 [5] T.Shinoda: Materials Science Research International, Special Technical Publication by The Society of Materials Society, Japan, Vol.

The work-piece material was AISI P20 tool steel which is a semicircular shaped work-piece material (100 mm diameter and 10 mm thickness).
Wang, Optimization of multi-response processes using the vikor method, International Journal of Advanced Manufacturing Technology. 31 (2007) 1049–1057
Matvienko, Investigation on the micro-structures and properties of the P20 steel surface after electrical discharge machining, Materials Science Forum. 789 (2014) 391-395
Haron, Surface integrity of AISI H13 in end milling and electrical discharge machining process, Advanced Materials Research. 264-265 (2010) 1044-1049
Sethi, Surface alloying of OHNS die steel by EDM process using Inconel electrode, International Journal of Machining and Machinability of Materials. 6 (2009) 176-193

Study of Tensile Bond Strength for Structural Silicone Sealants after Artificial Accelerated Aging Yukang Sun1,2,a*, Detian Wan1,2,b, Yiwang Bao1,2,c, Xiaogen Liu1,2,d, Yan Qiu1,2,e 1China Building Material Test & Certification Group Co., Ltd, Beijing, 100024, China 2State Key Lab. of Green Building Materials, China Building Materials Academy, Beijing 100024, China a15600511500@163.com, bdtwan@ctc.ac.cn, cywbao@ctc.ac.cn, dxtlxg88@163.com, eqiuyan@ctc.ac.cn Keywords: Structural silicone sealants; Tensile bond strength; Artificial accelerated aging; Durability Abstract.
Acknowledgements This work was supported by Project of Science and Technology Department of Guangdong Province (2015B010919007).
Wolf, A review of the work of the RILEM Technical Committee 139-DBS: Durability of Building Sealants, Materials & Structures. 31(3)(1998)149-152
Advanced Structured Materials. (2013)25
Proceedings of the Institution of Mechanical Engineers Part L Journal of Materials Design & Applicationsl. 229(5)(2014)349–79

Hydrometallurgy is defined as the science and method of processing or extracting materials from metal ores using certain solvents [6].
Materials and Method Materials The sample used is ferronickel smelted from a mini blast furnace (Table 1) using our previous research [16, 17].
In Journal of Physics: Conference Series (Vol. 2117, No. 1, p. 012024).
Wang, “The stability of sulfate and hydrated sulfate minerals near ambient conditions and their significance in environmental and planetary sciences,” J.
In Key Engineering Materials (Vol. 867, pp. 25-31).

Gil2,c 1Cracow University of Technology, Warszawska 24, 31-155 Krakow, Poland 2University of Science and Technology - AGH, al.
Ferritic steel of the Crofer22APU type belongs to the category of construction materials appropriate for the construction of inter-connectors in fuel cells of the SOFC type (Solid Oxide Fuel Cell).
Methods and material Crofer 22APU steel (24-Cr, 0.8-Mn, 0.5-Al, 0.5-Si in %wt) constituted the material for research.
Qadakkers for providing access to research materials.
Wood, Corrosion Science, 2, 173-196 (1962) [2] Badwal S.P.S., Deller D., Foger K., Ramprakash Y., Zhang J.P., Solid State Ionics 99, 297-310 (1997) [3] Quadakkers W.J., Piron-Abellan J., Shemet V., Singheiser L., Materials at High Temperatures 20(2), 115-127 (2003) [4] Tietz F., Buchkremer H.

Research of CoSiN Film as Diffusion Barrier in ULSI-Cu Metallization Zaiyu Zhang 1, a , Majia Wu1,b Xiuhua Chen 2,c 1 College of Electronic and Information Engineering,Engineering Center of Avionics Electrical and Information Network, Anshun University, Anshun, Guizhou 561000, China 2 Department of materials science and engineering, Faculty of Physical Science and Technology, Yunnan University, Kunming 650091,China azaiyuzhang@126.com, bwumajia@163.com, c chenxh@ynu.edu.cn Keywords: CoSiN; magnetic sputtering; barrier layer; CoSiN/Cu/CoSiN/SiO2/Si Abstract: CoSiN film can be used as diffusion barrier layer in ULSI-Cumetallization.
Introduction Copper has been extensively studied as an interconnect material for deep sub-micron circuits due to its superior electrical resistivity and resistance to electro-migration[1].
New refractory metal binary and ternary nitrides should be considered,cobalt- base nitrides are widely recognized as an attractive class of materials.
Cu Diffusion in Co/Cu/TiN Films for Cu Metallization [J],Journal of Materials Science & Technology, 22（3）(2006)332-335 [5]X.Qi, L.Yu, Jan Musschoot, et al.
Cao,et al.Effect of substrate temperature on the thermal stability of Cu/Zr-N/Si contact system[J].Materials Letters, 62(2008) 418-421

Materials and methods Description of the study site.
Journal of Mountain Science. (2009),P.703（In Chinese） [7] Feng Li, Guangsheng Zhou, Mingchang Cao.
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Chinese Journal of Applied Ecology，(2005)，P.14（In Chinese） [15] Xianliang Zhang, Mingxing Cui, Yanjun Ma.
Chinese Journal of Applied Ecology, (2010), P.2501（In Chinese）

Bogdanov Alexander: State-Dependent Riccati Equation Control for Small Autonomous Helicopters, Journal of Guidance, Control, and Dynamics, vol. 30, no. 1, pp. 47–60, 2007
Cloutier: Existence of SDRE Stabilizing Feedback, Journal of Aerospace Engineering, vol. 1, no. 3, pp. 1–14, 2002
Ridgely: Controllability Issues in Nonlinear State-Dependent Riccati Equation Control, Journal of Guidance, Control, and Dynamics, vol. 21, no. 5, pp. 767–773, 1998
Kamal: Trajectory Prediction for a Typical Fin Stabilized Artillery Rocket, 13th International Conference on Aerospace Sciences & Aviation Technology, Cairo, 2009
Kashif Siddiq, Fang Jian Cheng, and Yu Wen Bo: State Dependent Riccati Equation Based Roll Autopilot for 122mm Artillery Rocket, International Conference on Aerospace, Mechanical, Automotive and Materials Engineering, Bangkok, 2012, pp. 616-624

Test System and Test Process Materials: The lignite and oil-shale samples were respectively provided from the Shenbei mining area and huadian mining areas.
International Journal of Hydrogen Energy, 2008, 33(1)275-285.
Journal of China Coal Society, 2003, 28(2):126-130.
Journal of China Coal Society, 2011, 36(5)151-155.
Coal Science and Technology, 2006, 34(11):79-82.

In order to understand the current problems in the pipeline materials and to develop steels with higher strength, better toughness and weldability, this paper gives brief overview of the comprehensive of fracture behavior including crack initiation and propagation of high strength low alloy pipeline steels. 1.
Introduction Pipelines have done a great job in transporting crude oil and natural gas over long distances in the past and will also be widely used in the future, which lead the research activity in pipelines materials started decades ago to overcome the major fracture problems.
Therefore, understanding of the theory of fracture behavior in base metal and welding area in pipe materials are essential scientific approach in order to study the structural integrity of high strength low alloy steel (HSLA) analytically, numerically or experimentally.
Mittal, Low temperature ductility and ductile crack arrest properties of high-strength low alloy steel –Part 2, Pipeline and gas Journal, Vol. 238 No. 1, 2011
Amsterdam: Elsevier Science 2000, pp303-14