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Electronic structure and doping effect of Ni and Co in the kink on the edge dislocation of bcc iron Li-qun Chen a and Zheng-chen Qiub College of Sciences, Central South University of Forestry & Technology, Changsha 410004, China aldclqun@163.com, bclqun123@sohu.com Keywords: Electronic structure, doping effect, alloy element, dislocation, kink Abstract: Using the first-principles self-consistent discrete variational method based upon density functional theory, we investigated the energetics and the electronic structure of the 3d impurities Ni and Co in a kink on the [100](010) edge dislocation (ED) in bcc iron.
Dislocations are always present in most crystalline materials and influence a variety of properties, including mechanical, electric, optical and magnetic [2].
It is commonly accepted that the dislocation motion in materials having a high Peierls relief is accomplished by the nucleation and propagation of kinks along the dislocation line [2].
However, this very transparent but simplified concept is insufficient to describe the mechanical properties of real materials, where the impurity-kink interactions play a crucial role in kink dynamics.
Qiu, C.Y.Wang and T.Yu, "Electronic effect of boron impurity on the kink in bcc iron", Journal of Alloys and Compounds (2006), in press [11] D.

., it requires an accurate geometric shape and parameters with a low roughness of a machined surface, it requires machining of parts and materials to which only the process of grinding can be utilized, or the other processes are almost out of use (e.g., machining of hardened steels), as it demands machining of components for which the grinding process is the most efficient. [6] Advantages of hard turning Among main advantages of the technology mentions that a reduction of material is relatively high compared to grinding, heat emission is limited to the sphere of a point of a machine and thus a heat impact of a surface level of a work piece is reduced, the technology shows a high flexibility level especially while working of sectional rotation surfaces, it demonstrates a significant reduction of a work piece period and in continuous production period compared to grinding, limits, resp. elimination of cutting fluids which is beneficial to ecologization of production.
Acknowledgement The article was funded by the grant project VEGA 1/0773/12 - “Implementation of technical ceramic material research to increase the innovation of hybrid products”.
Applied Mechanics and Materials, pp. 284-291, (2014) [3] A.
Ceclan, “Calibration of 5 axis CNC machine tool with 3d quickset measurement system”, Academic Journal of Manufacturing Engineering, VOL. 12, ISSUE 1/2014, pp. 24-28, (2014) [8] N.
Cubonova: Postprocessing of CL Data in CAD/CAM System Edgecam using the constructor of Postprocessors, Manufacturing Technology : J. for Science, Research and Production, vol. 13, No. 2, pp.158-164, (2013) [9] J.

Irving 1,c 1 School of Applied Sciences, Cranfield University, Cranfield, Bedford, UK 2 School of Engineering, Cranfield University, Cranfield, Bedford, UK a j.doucet@cranfield.ac.uk, b xiang.zhang@cranfield.ac.uk, c p.e.irving@cranfield.ac.uk Keywords: Life enhancement, bonded crack retarder, bonded strap, integral metallic structure, FEA Abstract Aircraft structural design and manufacture is moving towards lighter structures that have extended lives and improved damage tolerance.
Table 1: Aluminium and adhesive mechanical properties Material E (GPa) n CTE (1/°C) 2624-T351 71 0.33 24 x 10-6 FM94 1.9 0.5 7.5 x 10-5 Mixed mode fatigue testing was performed on a 20 kN DMG machine using a mixed mode test jig geometry [11-13], Figure 1.
All materials were modelled as linear elastic using the material properties presented in Table 1 and the Glare properties in Table 3.
Table 3 : Orthotropic mechanical properties of Glare-2 6/5 (0.4) Material E1 (GPa) E2 (GPa) E3 (GPa) n 12 n 13 n23 S2-prepreg 50.3 5.5 5.5 0.31 0.31 0.034 2024-T3 72 72 72 0.3 0.3 0.3 Material G12 (GPa) G13 (GPa) G23 (GPa) CTE11(1/°C) CTE22(1/°C) CTE33(1/°C) S2-prepreg 1.995 1.995 2.099 2.88x 10-6 4.03 x 10-5 4.03 x 10-5 2024-T3 / / / 24 x 10-6 24 x 10-6 24 x 10-6 A contact interface was defined between the substrate and adhesive and a tie constraint between the strap and the adhesive.
[12] Reeder JR and Crews JR, Mixed-Mode Bending Method for Delamination Testing, AIAA Journal, 28 (1990): 1270—1276

Material used in diamond beads manufacture may be of natural or synthetic origin.
The main difference between both is the addition of an abrasive material to the water to increase the cutting power of the water jet when using the abrasive water method. [9].
This methodology can treat, without reducing the productivity, rock of very thin thickness and particularly fragile materials, thus allowing to enlarge the market of applications of the technology that makes use of the water jet, both for cutting and for surface finishing [12].
While the water jet technique is used in quarries for cutting and extracting rock blocks "in situ", the abrasive material combined with water jet (Abrasive Water Jet) is used in the cutting and molding of decorative parts.
South African Journal of Science.

Introduction Acrylic resins are materials used in dentistry as denture materials, removable denture bases, and also prosthesis repair [1].
References [1] Hatrick CD and Eakle WS 2016 Dental materials: Clinical applications for dental assistants and dental hygienists 3rd ed St.
Iasi. 111(2) 477-81 [14] Istiqlal N 2015 Pengaruh seduhan kopi arabika gayo terhadap kekasaran permukaan basis gigi tiruan resin akrilik heat cured Banda Aceh: Fakultas Kedokteran Gigi Unsyiah ix, 30 [15] Gupta G and Gupta T 2011 Evaluation of the effect of various beverages and food material on the color stability of provisional materials – An in vitro study J. 
Dent. 2 193-6 [20] Young BC 2010 A comparison of polymeric denture base materials [Master's thesis].
Scotland: University of Glasgow 101, 103 [21] Anusavice KJ, Shen C and Rawls HR 2013 Phillps' science of dental materials 12th ed St.

Bronze-steel was selected as friction pair material between worm wheel and worm, so equivalent friction angle φν was 5.71o~10.20o.
Aluminum alloy whose elastic modulus E was 69GPa, poisson ratio μ was 0.31 and density ρ was 2800kg/m3 was selected as the material of adjusting mechanism.
Because the breaking point of the material σb was 85MP, the mechanism fulfilled stress condition.
Acknowledgements The authors would like to thank the financial supports of Anhui Provincial Education Department Natural Science Foundation (Grant No.
Synchronization Optimum Design of Single-crank and Double-rockers Mechanism [J].JOURNAL OF MECHANICAL ENGINEERING, 2010, 46(7):22-26.

The material consists of several phases.
The presence of precipitate phases embedded in the matrix makes it a heterogeneous material.
The relation between F and the mass fraction P can be obtained considering an elementary domain of material of mass δm.
[13] Goto S., Nomaki K., Koda S., Internal Oxidation of Nickel Alloys Containing a Small Amount of Chromium, Journal of the Japan Institute of Metals, vol. 31, pp. 600-606, (1967)
[15] Alcock C.B., Brown P.B., Physicochemical Factors in the Dissolution of Thoria in Solid Nickel, Metal Science, vol. 3, 1, pp. 116-120, (1969)

Analysis of aluminum supply and demand development trend in China and the United States Xin Li1, a, Xiang Zhang1,b 1 College of Management Science, Chengdu University of Technology; Chengdu Sichuan, China alixin2012@cdut.cn, b64549017@qq.com Keywords: aluminum supply and demand, invert ”U” curve, primary aluminum production, secondary aluminum production.
Introduction Aluminum is a widely used fundamental material and is imperative for industrial and economic development.
The above implies that for many secondary materials an essentially global industry has developed on the basis of profit incentives, and prices are determined by demand and supply in these markets[4].
Secondary aluminum raw materials mainly rely on imports, which makes China's aluminum industry external dependency is very high, and by the rapid development of recent 20 years, significantly increased the social stock of China's aluminum, Chinese imports aluminum scrap began to slowly reducing , aluminum scrap self-sufficiency ability raise.
[7] XU Guo-dong, AO Hong3, SHE Yuan-guan1.Current status and development trend of aluminum industry in world and strategy suggestions in China under background of sustainable development, The Chinese Journal of Nonferrous Metals,2012;07:20-12.In Chinese.

Bu China University of Geo-sciences Beijing 100083 China bucg@cugb.edu.cn Keywords: Tri-cone bit; Radial clearance; Contact stress; Roller bearing; Life Prediction Abstract.
Generally speaking, the structure and size are close, the materials and working environment are similar between two brands of tri-cone bit.
In order to optimize design of tri-cone bit, the materials, and heat treatment of the roller bearing anti-friction pair should be taken into consideration besides the radial clearance of assembling bit.
Vol. 54(2) (1998), p.18 [8] Henry Krzeminski-Freda, Bogdan Warda: Wear, 192(1996), p. 29 [9] Yangang Wei, Yi Qin, Raj Balendra, Qingyu Jiang: J. of Materials Processing Technology Vol. 145(2004), p. 233 [10] Editor Committee on Mechanical Engineering Manual: Mechanical Engineering Manual, Vol.5, (China Machine Press, Beijing, 1982) [11] Qunyi Jia: Design and Application of Anti-friction Bearing (The Northwest China Polytechnic University Press, Xi'an, 1991) [12] Yan Huang: Engineering Elastic Mechanics (Tsinghua University Press, Beijing, 1982) [13] Changgen Bu, C.B.
Wang: Chinese Journal of mechanical engineering Vol. 37(2001), p. 26

Material properties were defined with reference to some preliminary compression tests performed on thin leaf masonry specimens (Giuriani et al. 2007) and to the values proposed by Lofti & Shing 1994 and Lourenço 1994.
Material properties are summarized in Fig. 5a.
The unrealistic plateau of the curves at the mechanism onset follows the assumption of perfectly plastic behavior of the material in compression.
"The science of structural engineering."
Journal of Structural Engineering, 120(1), ASCE