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Characteristics of Low Temperature Brittle Fracture Surface of High Nitrogen Austenitic Steel Shicheng Liu1, a, Shiyong Liu2,b and Deyi Liu1,c 1 College of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116028, China 2 Electromechanics and Materials Engineering College,Dalian Maritime University, Dalian 116026, China a ymlsc@online.ln.cn, bshiyong@newmail.dlmu.edu.cn, cldy@djtu.edu.cn Keywords: high nitrogen austenitic steel; brittle fracture; fracture appearance; fracture mode.
Experimental The material used is a HNAS sheet composed of 0.048C, 19.33Cr, 19.64Mn, 0.70N, 0.42Si, 0.029P, 0.008S, 0.27Ni (wt %), and balance Fe.
[6] Shiyong Liu, Shicheng Liu and Deyi Liu: Journal of Materials Science, Vol. 39(2004), p.28418
Dai: Trans. of Materials and Heat Treatment, Vol. 26(2005), p. 33.

Figures 3 and 4 show FEA model conditions and stress-strain curves of SUS304 steel material.
Table 2 summarizes the measured material properties.
Isozaki : Journal of Structural and Construction Engineering (Transactions of Architectural Institute of Japan), No.556 (2002), p159
Shin : Key Engineering Materials, Vols.452-453(2011), p.617
Kim : Key Engineering Materials, Vols.452-453(2011), p.613

This paper proposes that using the energy-saving insulation materials as the outdoor building envelope for the simulated room Table 1.
Using insulation materials will not only enhancing interior comfort greatly but also saving energy.
Table 1 Building envelope materials and heat transfer coefficient form Building type Building envelope materials Heat transfer coefficient/（m2·K)/ Rural residential Exterior wall Cement mortar 0.45 Benzene insulation board Concrete brick Roof Cement mortar 0.35 Reinforced concrete Porous concrete Benzene insulation board Exterior windows Aluminum hollow glass window 2.8 Kang - firewall combined heating simulation Use fluid mechanics simulation software to build kang - firewall combined heating temperature distribution model which is shown in Fig.1.
Acknowledgements This research was supported by National Twelfth Five-Year Science and Technology Plan Project (2012BAJ26B02).
[6] PeiHong Zhang,FuLong Xia, JingYuFu, The heating effect of the numerical simulation and analysis of influencing factors [J], Journal of Shenyang architectural university: natural science, 2009, 25 (2) : 342-346In Chinese.

Calculation of Energy Consumption for Large Generator Cooling System Wei Huang1, a, Ziyu Wu2, 3, b *, Jianhong Guo2, c, Haifeng Wang2, Guobiao Gu2, Changhai Miao1, Yanfei Guo1, Ling Cheng1 1China Electric Power Research Institute, Beijing 100192, China; 2 Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China. 3 University of Chinese Academy of Sciences, Beijing 100049, China.
The production material comprising: flowing water, industrial water and soft water which through the ion exchanger.
Production material comprising: hydrogen, soft water and industrial water.
Production material only contains industrial water and soft water.
Qing-hua: Journal of Power Engineering, Vol. 29 (2009) No.7, p.645-649

Fig. 1 The structure Material Model Explosive Model.
Acknowledgements This work was supported by the National Natural Science Foundation of China (Grand Nos.50678116 and No.51178310).
Bai: Theoretical Basis and Case Study of LS-DYNA3D (Science Press, Beijing2005), in Chinese
GAO: Journal of Architecture and Civil Engineering, Vol.24 (2007), in Chinese
Wang: Numerical Analysis for Progressive Collapse of a Multi-storey Building Due to an Explosion in Its Basement, Advanced Building Materials, Vol.250-253 (2011)

Effect of Carbon doped in BN on thermodynamic properties Jing Ao Ai-ling Ding Chun-mei Li Feng Li Jin Wang Zhi-qian Chena School of Materials Science and Engineering, Southwest University, Chongqing,China aChen_zq@swu.edu.cn Keywords: BN, density functional theory, bulk modulus, thermodynamic properties Abstract: The thermodynamic properties of (B1-xCx)(N1-xCx) (x=0, 0.25, 0.5) are calculated by the ultra-soft pseudo-potentials within local density approximation in frame of density functional theory with virtual crystal approximation and using the quasi-harmonic Debye model.
Thermal properties of materials mainly includes the temperature and pressure effects on some physical quantities, such as heat capacity, bulk modulus and thermal expansion coefficient.
Thus, (B1-xCx)(N1-xCx) with x=0,0.25,0.5 is superhard materials with good structural stability under high temperature,and (B1-xCx)(N1-xCx) with x=0.5 is the best according to Fig.2(a).
Acknowledgements This work was financially supported by the National Natural Science Foundation (51171156).
Hasselman: Journal of the American Ceramic Society 75 (1992) 2887

Thermodynamics of iron metallothermy Mihai Ovidiu Cojocaru1, a, Mihai Branzei1, b * Tudor Coman2, c 1 Faculty of Material Science and Engineering, University POLITEHNICA of Bucharest, 313 Splaiul Independentei, Sector 6, 060042 Bucharest, Romania 2 SC QUARK EXE SRL, 121 Rasadnitei Street, Sector 6, 060631 Bucharest, Romania amocojocaru2005@yahoo.co.uk, b*mihai.branzei@upb.ro, cquark1994@yahoo.com Keywords: thermodynamic, metallothermy, iron oxides, thermitic composition.
The heat amount release by the material addition - the thermite steel should be sufficient to produce the rapid melting of the base material in the contact area with this, the further solidifying assuring thus the permanent joining.
Materials and Methods In order to quantifying the effects of iron oxides proportion in the thermitic compositions on the level of the reactions enthalpies namely on the thermal effect of the aluminothermic reduction reactions of iron oxides has been performed by using a specialized software [4,5].
Maximov, Review - Thermite reactions: their utilization in the synthesis and processing of materials, Journal of Materials Science, 28 (1993), pp. 3693-3708

The development and application of OpenSees is sponsored by the Pacific Earthquake Engineering Research Center through the Nation Science Foundation engineering and education centers program.
OpenSees has 3 single axis concrete constitutive model, concrete 01 Material (constructing a uniaxial Kent-Scott-Park concrete material object with degraded linear unloading/reloading stiffness), Concrete 02 Material (constructing a uniaxial concrete material object with tensile strength and linear tension softening) and Concrete03 Material (constructing a uniaxial concrete material object with tensile strength and nonlinear tension softening).
Fig 2 shows the uniaxial model for Concrete 02 Material used by this paper.
Acknowledgements This work was financially supported by the Key Subjects in the National Science & Technology Pillar Program during the Eleventh Five-Year Plan Period (2008BAE61B05-04).
Introduction and Comparison of Several resentative Confinement Models for Concrete[J] Journal of Chongqing Jianzhu University, 2003.(4):121-127.

Currently, the pumpability of HS & HP concrete appears to be a pressing issue in our country. 2.1 The optimization of raw materials It is fairly important to select and optimize the raw materials for the preparation of C80 HS & HP concrete.
In order to preferably tackle the problem of pumpability, the design of mix proportion in relation to the C80 concrete utilized in this project, apart from the consideration of conventional parameters as the rational adoption of total amount of binding materials and sand coarse aggregate ratio, has attached more attention on the following control measures. 2.2.1 The control of grain composition of admixture The slag powder and silica fume are selected and used as the admixture in accordance with the features and supply of local materials.
The C80 concrete mixture individually added with slag powder (25% of total amount of binding materials) has a better liquidity and a poor uniformity, and inclines to appear the exudation and bottom-holding phenomenon, which is to the disadvantage of ultrahigh pumping; when mixed with slag powder (20% of total amount of binding materials) and silica fume (3% of the total amount of binding materials), the C80 concrete has seen great improvement where the liquidity and uniformity are concerned.
The experimental results may be caused by the following two aspects: (1). the thickness of C80 concrete and low exudation rate of pressure result to the small exudation of 10s and the subsequent larger dispersion of experimental results. (2). since the larger application of binding materials in C80 concrete, the exuded water contains much binding materials that block the water outlet, leading to the large deviation of data.
Journal of Chongqing Architectural University. 1999.2 [2].

Design of High Precision Sunlight Intensity Measurement Device Shuwang Chen Institute of Information Science & Engineerning, HeBei University of Science and Technology, YuHua east road, No.70, ShiJiaZhuang City, HeBei Province,China, 050018 chenshw@vip.sina.com Keywords: Sunlight intensity; Digital meter; High precision Abstract: Photoelectric detection technology is a kind of new technology of non-contact measure, and it is one of the most important means and methods of modern detection technology.
On the other hand, the output signal from the analog comparer controls the state of the digital circuit and displays the result. 3.3 Display component LED　is made of semiconductor material, which can transform the electric signal to light signal.
Agricultural Sciences in China. 2008.
Journal of Zhejiang University Science. 2004.
Mining Science and Technology. 2010.