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Structural Aspects Revealed by SEM Investigations for 2024 Aluminum Alloys

Abstract

In this presentation are evidenced instrumental characterization by Electronic Scanning Microscopy (SEM) equipped with EDS / WDS of aluminum alloys such 2024 alloy with multiple synergistic purposes as: acquisition of new knowledge, increase the amount of information obtainable about the material, increasing the efficiency and the quality of the tests, characterization of special destination alloys and assessing their conformity with the specified requirements. In this direction, it requires both the knowledge the test methods (theoretical basis, test method, procedure relating to the method, quality assurance testing) as well material characteristics investigated. These aspects are necessary for test system design, and preliminary interpretation of experimental results.

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Analysis of the Combustion Air Preheater from the Aluminum Melting Furnaces

5 REFERENCES Journals: [1] Subodh, K.D., Improving energy efficiency in aluminum melting , DE-FC07-01ID14023, april 2007, http://www.phinix.net/services/Energy_Management/Improving_Energy_Efficiency.pdf . [2] White, D., High efficiency aluminum melting, reverberatory furnaces and true ROI, Die casting engineers, Jan.2011, pp.34-36. [3] Gorog, P., a.a., Improved materials and operation of recuperators for aluminum melting furnaces, DE-FC36-04GO14035,sept.2007. http

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Natural Gas Consumption Reducing in Aluminum Melting Furnaces by Heat Recovery of Flue

5 REFERENCES Journals: [1] Gorog, P., Improved materials and operation of recuperators for aluminum melting furnaces, DE-FC36-04GO14035,sept.2007, http://www.ornl.gov/sci/ees/itp/documents/FnIRptRecuperatorsFinal.pdf . [2] Subodh, K.D., Aluminum melting furnace design optimization to improving energy efficiency by integrated modeling, University of Kentucky, july 2008, http://www.phinix.net/services/Energy_Management/Aluminum_Melting_Furnace.pdf . [4] Heiligenstaedt, W., Thermique appliques aux fours industriels, Dunod, Paris 1971. [6

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Structural Transformations During Tempering in the Steels with High Content of Mo and Co

Abstract

The structural transformations occurring at tempering for some high-speed steels are a subject of research for which have been dedicated numerous studies. More complex compositions of the high-speed steels were direct consequence of the complexity of structural transformations which occur during heat treatment. On the other hand, current tendency in energy requires maximum efficiency and rational use of heating sources used in industry. Thus, only a precise knowledge of the kinetics of transformations occurring at tempering can be a basis for optimizing this treatment. Although cobalt is used for a long time as an alloying element, though relatively recently it was considered important to the properties of rapid steel. These circumstances, combined with the lack of quantitative information on the kinetics transformation at tempering operation treatment for some steel has led to this paper. The thickness of the studied samples is 5 mm and was taken from the annealed steel bars. These samples were subjected to hardening and tempering treatment in salts bath. Heating for hardening was performed in two steps, at 5500C and 8300C. Austenitizing was done at 12000C, during 120 seconds. The cooling was done up to 5300C in salts bath, with a keeping of 15 seconds, and then air cooling was done. On these samples were carried out, HRC Rockwell hardness measurements, and X-ray diffraction analysis.

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Studies Regarding the Reaction Method to Wear Braking Mechanism

a pad/disc during braking, Applied Thermal Engineering 30, DOI: 10.1016/j.applthermaleng.2009.09.015. [4] Milenković PD, Jovanović S J, Janković AS, Milovanović MD, Vitošević ND, Djordjević MV, Raičević MM (2010) The influence of brake pads thermal conductivity on passenger car brake system efficiency, Thermal Science, Vol. 14, Suppl.: S221-S230. [5] Popescu N, Geza E (1999) Contribution to increase of the performance composite materials having friction properties, in Proc. 2-nd National Powder Metallurgy Conference, Metallurgical

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New Cyber-mixmechatronic Concept for the Realization of Smart Cybernetic Systems with Applications in the Industry, Economy and Society

-2014) Volume: 1648 Published: 2015 Times Cited: 0, DOI: 10.1063/1.4912855; [35] Rizescu C. I., Ciocan M. and Rizescu D., “ Robot Control for Home Application”, Applied Mechanics and Materials Vol. 332 (2013) pp 145-153, ISSN 16609336, ISBN (978-3-03785-733-5), DOI: 10.4028/www.scientific.net/AMM.332.145 ; [36] Rizescu, C.I., Udrea, C. Rizescu, D., “ Experimental Setup for Harmonic Drive Efficiency Determination” , Advanced Materials Research Vols. 463-464 (2012) pp. 1518-1521, ISSN 10226680, ISBN 978-303785363-4, Accession Number: WOS: 000308114100299

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