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Online since: March 2011
Authors: V. Smukala, B. Buff, D. Kreimeier, C. Magnus, J. Zhu
Depending on the material and the geometry being formed, parameters like the infeed, the forming velocity or especially the tool path affect the part’s accuracy.
Because the flank angles is beyond the material specific limit of 65° in some areas the part cannot be formed in one step.
CIRP Journal of Manufacturing Science and Technology 1 (2008) 2-17, p. 2-17 [2] J.
Kleiner: Proceedings of 11th ESAFORM2008 conference on material forming, Lyon (France), 2008
Online since: October 2014
Authors: Fan Zhang
Design of Control Scheme for Variable Air Volume Air-conditioning System Fan Zhang School of Computer Science, Wuhan Donghu University, Hubei, Wuhan 430212 Keywords: Variable air volume, Air-conditioner, Control scheme Abstract.
We can see from formula (8) that the design fresh air volume consists of staff part for diluting staff and the fresh air volume required by pollutants, and building part for diluting staff and the fresh air volume required by decoration materials, floor, furniture and HVAC system.
: the equivalent roughness elevation of pipes, the material of pipes is galvanized steel tube, and K is 0.15mm
ASHRAE Journal ,2001 (11) :69-76
Online since: March 2017
Authors: Jian Dong Xing, Yi Min Gao, Zhi Fu Huang, Ming Zheng, Li Qiu Sun, Sheng Qiang Ma
Microstructure and Properties of Fe-B-C Cast Wear-Resistant Alloy Zhifu huang*, Jiandong Xing, Shengqiang Ma*, Yimin Gao, Ming Zheng, Liqiu Sun 1State Key Laboratory for Mechanical Behavior Of Materials, Xi’an Jiaotong University, Xi’an, 710049, China Email: hzf@mail.xjtu.edu.cn; jdxing@mail.xjtu.edu.cn; sqma@mail.xjtu.edu.cn; ymgao@mail.xjtu.edu.cn; mzheng@mail.xjtu.edu.cn; slq@mail.xjtu.edu.cn * Correponding author, e-mail: hzf@mail.xjtu.edu.cn; sqma@mail.xjtu.edu.cn Keywords: Microstructure; Properties; Fe-B-C alloy; Boron; Carbon Abstract.
Introduction Fe-B-C alloy is a new wear-resistant material, which takes hard boride with a hardness of Hv 1200-1800 as a strengthening phase 1.
Acknowledgement This work was supported by the National Natural Science Foundations of China (51371138), (51301128) and the Program for New Century Excellent Talents in University (NCET-12-0457).
[8] Aso S, Hachisuka M and Goto S:“Phase transformation of iron matrix of Fe-15 mass% Cr-C-B alloys”, Journal of the Japan Institute of Metals, 1998, 61(7), pp. 567-573
Online since: September 2018
Authors: Marina V. Shumeyko, Galina V. Sagamonova, E.V. Sagamonova
Materials and Methods The world economy is on the verge of a singular explosion in management, that is projected by the middle of this century.
Already now world economy, science and education are preparing for this breakthrough.
Currently the experts in the field of accounting and management use a system of five measurement indicators: in addition to the two known for about 600 years, qualimetrical assessments of economic situations, temporary stages and kinds of activity are introduced into the accounting practice. [2] The streams limited by time frames: material, financial, investment, innovative as measuring categories were first defined by M.
Crandall, Systematic risk management approach for construction projects, Journal of Construction Engineering and Management. 116 (1990) 533-546
Online since: March 2020
Authors: Mohamed M. Rashad, E. Mostafa Elsayed, H.F.Y. Khalil, M.R. Hussein, M.M.B. El-Sabbah, I.A. Ibrahim
BOX.87 Helwan, Egypt11421 3,4,5Chemistry Department Faculty of Science, Al-Azhar University, Nasr City, Egypt a*elsayed2021@gmail.com, brashad133@yahoo.com, chazem.khalil@azhar.edu.eg, dmostafalaz1@gmail.com, emmbelsabbah@gmail.com, fibrahimcmrdi@yahoo.ca Keywords: ZnFe2O4, electrodeposition, Anodization thin film, current efficiency, nanoparticles.
The sharpness of XRD peaks was essentially attributed to the good material crystalinity of the ZnFe2O4 film.
Ibrahim, Electrodeposition-anodization preparation of nanocrystalline nickel ferrite films from aqueous sulfate solutions: a material for sensing of toxic household gases and health monitoring, ISSN 1813-7911.
Saba, Preparation of standard copper ferrite thin film from aqueous solution’, Journal of steel and related material, Steel Grips, 7 (2009) 137-141.
Online since: July 2014
Authors: Guang Yu Tan, Can Liu, Jing Quan Wu, Huan Lao Liu, Feng Wang
Introduction Axial and radial runouts of mills will make cutting depths and uncut thicknesses of material different among teeth, exacerbate vibration of mills, and then decrease its lifetime.
Material of #45 steel (no hardening), down milling mode, air cooling, speed of 678r/min, sampling frequency of 2034Hz, cutting width of 5mm were applied.
The material was fixed on the dynamometer.
Waveforms of Milling Forces in Tests with Variable Feed (az=0.16 mm) Acknowledgments The authors acknowledge the National Natural Science Foundation of China (51375099, 51375100) for supports.
Tan: Journal of Mechanical Engineering 49 (2013) 185-190.
Online since: December 2012
Authors: Wen Hui Zhang, Zhe Wang, Yi Gong, Xue Hong Wu, Yan Li Lu
The diameter is 10mm and the thickness is 1mm semi-hard copper tubes which chosen as the material for all system components.
Tans-critical CO2 Refrigeration system diagram with measurement points Table 1 Dimensions of the heat exchangers Heat Exchangers Gas cooler Evaporator IHX Configuration Inner Tube OD/Outer Tube OD Coaxial, single pass, 10 rows 6.35 mm/12 mm 16 rows 9.5mm/16mm 2 rows 16mm/20mm Total Heat Transfer Area 0.9m2 1.9m2 0.15m2 Materials Nickel-copper alloy tube Table 2 Ranges and Uncertainties of Measuring Instruments Measured variable Measurement device Calibration range Calibrated accuracy Temperature (°C) Differential pressure(bar) T-type thermocouple Pressure transducers -40.0-200.0 0-35 ±0.5 ±0.1% Pressure(bar) Pressure transducers 0-350 ±0.1% fluid volume rates (m3/h) Magnetic flow meter 1-10 ±0.5% Refrigerant mass flow rate(kg/s) Power consumption (kW) Compressor speed (rpm) Coriolis mass flow meter Digital wattmeter Signal the inverter drive 0-0.3 0-6 0-1450 ±0.2% ±0.5% ±1.5% Circulating water system: including a cooling water, chilled water systems and the external balance
Acknowledgements The authors are indebted to Zhengzhou university of Light Industry and The national science and technology support projects of China (2006 BAJ01A10-07) for the economical support given to the present work and for the grant.
International Journal of Refrigeration, 2008, 31(3): 411-422
Online since: August 2014
Authors: Tadeusz Nieszporek, Andrzej Piotrowski
The construction should be straightforward, reliable, as cheap as possible and made from generally available materials (steel or aluminium sections).
For the production of amorphous panels, a small amount of silicon is used, which is applied onto another material, such as glass.
In: Applied Mechanics and Materials.
In: Advanced Materials Research.
In: MM Science Journal.
Online since: May 2018
Authors: Zeng Ling Wu
Materials and Methods 1.1 Ore samples The low-grade sulfide gold ore sample was obtained from Yunnan, China.
Acknowledgments This work was supported by National Natural Science Fund of China (Grant No. 51504071, 51474075).
Chan, Effect of temperature on column bioleaching of a refractory gold ore, Advanced Materials Research.825 (2013) 352-355
Tunde, The effect of total iron concentration and iron speciation on the rate of ferrous iron oxidation kinetics of Leptospirillum ferriphilum in continuous tank systems, Advanced Materials Research. 20-21 (2007) 447-451
Geoffrey, The effect of aluminium and magnesium sulphate on the rate of ferrous iron oxidation by Leptospirillum ferriphilum in continuous culture, Advanced Materials Research. 21-22 (2007) 156-159
Online since: January 2019
Authors: Eleni Pavlidou, Maria Stefanidou, Eirini Chrysanthi Tsardaka
Nowadays the production of compatible materials used for restoration purposes with minimum flaws is an interesting field of study.
During the last decades, nanoparticles are studied for their influence in building materials.
Materials and Methods Materials.
Construction and Building Materials 58 (2014) 147-158 [8] S Barbhuiya, S Mukherjee, H Nirkaz, Effects of nano-Al2O3 on early age microstructural properties of cement paste, Construction and Building Materials. 52 (2014) 189-193 [9] D Kong, D J Corr, P Hou, Y Yang, S P Shah, Influence of colloidal silica sol on fresh properties of cement paste as compared to nano-silica powder with agglomerates in micron-scale, Cement and Concrete Composites. 63 (2015) 30-41 [10] D Koli Kumar, G Agnihotri, R Purohit, A Review on Properties, Behaviour and Processing Methods for Al-Nano Al2O3 Composites, Procedia Materials Science. 6 (2014) 567-589 [11] C Edvardsen, Water permeability and autogenous healing of cracks in concrete, ACI Mater.
Construction and Building Materials 81 (2015) 268–275
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