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Determination of Emissivity of Brass Alloy using Infrared Thermographic Technique

-1539. [4] HangJin, J., Jonathan, K., Kyle, B., Kumar, S. (2017): Spectral emissivity of oxidized and roughened metal surfaces. International Journal of Heat and Mass Transfer, 115, Part B, pp. 1065-1071. [5] Švantner, M., Honnerová, P., Veselý, Z. (2016): The influence of furnace wall emissivity on steel charge heating. Infrared Physics & Technology, 74, pp. 63-71. [6] Deheng, S., Qionglan, L., Zunlue, Z., Jinfeng, S., Baokui, W. (2014): Experimental study of the relationships between the spectral emissivity of brass and the temperature in

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The tribological properties of Al-brasses in various environments

References 1. Callcut, V. The brasses: properties & applications. 2nd edit. Hemel Hepstead : CDA Publication, 2005. 2. Heitz, E. Chemo-mechanical effects of flow on corrosion, Corrosion 1991, 47, 135-145 3. Chen, J.L. - Li, Z. - Zhao, Y.Y. Corrosion characteristic of Ce Al brass in comparison with As Al brass, Materials and Design 2009, 30, 743-1747. 4. Moshkovitch A., Porfilyev V., Lapsker I., Rapoport L. Friction, wear and plastic deformation of Cu and α/β bras under lubricatin conditions, Wear

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Parametric Analysis of Electrochemical Discharge Drilling on Soda-Lime Glass Material Using Taguchi L27 Orthogonal Array Method

Abstract

The Electrochemical discharge machining (ECDM) is a hybrid non-traditional process which is specifically used for machining of conducting as well as non-conducting materials. In this research work, the fabricated ECDM experimental setup was used to machine the Soda-lime glass material with Brass tool material. The experiments were done on Soda-lime glass material with the help of Taguchi L27 orthogonal array method and analysed by using MINITAB 17 software. The average hole diameter and average machined depth results were checked after ECDM drilling on Soda-lime glass material with considering the input process parameters such as an electrolyte concentration, voltage and rotation. The experimental results indicated that voltage was the most dominant factor for average machined depth followed by an electrolyte concentration and rotation speed. The rotation speed was the most dominant factor for average hole diameter followed by voltage and electrolyte concentration.

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Queering gender in contemporary female Bildung narrative

’s Press. Helen Walsh: young, gifted, bold as brass (2008, March 7). The Independent. Retrieved from: http://www.independent.co.uk/arts-entertainment/books/features/helen-walsh-young-giftedbold-as-brass-792492.html Howe, S. (1930). Wilhelm Meister and his English kinsmen: Apprentices to life. New York: Columbia UP. Labovitz, E. K. (1986). The myth of the heroine: The female Bildungsroman in the twentieth century, Dorothy Richardson, Simone de Beauvoir, Doris Lessing, Christa Wolf. New York: Peter Lang. Lloyd

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Assessment of possible application of waterlubricated sintered brass slide bearing for marine propeller shaft

ABSTRACT

Water-lubricated bearings have been applied to support ship screw shafts for over a hundered years. Development of plastic materials has caused that novel sliding polymers appeared available on the market and being approved by classification institutions, possible to be applied in shipbuilding. However in the subject - matter literature there is no reference to application of bearings fitted with metal or ceramic bushes in shipbuilding. Nevertheless they have important merits such as low resistance to motion, long service life or stability of form. But some doubts are evoked by their large value of shape elasticity module which can lead to local stress concentration at the bush edges in the case of non-axiality of bush and shaft axes. Hence this work has been aimed at the testing of a bearing made of bronze-graphite silter. In the work is presented a comparison of measurement results of resistance to motion , hydrodynamic pressure distributions in lubricating film as well as shaft axis trajectories of the bearing, with those made for a typical elastic polymer bearing. The measurement results have showed high quality of the tested material. In the opinion of these authors it could be applicable to bearing ship propeller shafts.

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Analysis of Heat Transfer in a Supersonic Rocket Head

Engineering Research, 2(5), pp. 1708-1714. [7] Rosłowicz, A., 2013, „Optymalizacja rakiety lecącej na 100km” [Optimalization of a rocket flying at 100km] , Praca przejściowa inżynierska, Politechnika Warszawska, Warszawa. [8] 2012, „Metale kolorowe, mosiądz” [Non-ferrous metals, brass] , http://www.dostal.com.pl/metale-kolorowe-mosiadz.html .

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All-Metal Book Bindings in the 19th Century

Abstract

The article presents the results of the research activities of Hana Slovik-Vávrová concerning the mapping of preserved all-metal brass book bindings in the collections of institutions in the Czech Republic. She has recorded a total of 145 of these exceptional book bindings from between the end of the 18th century and the 1920s, coming from 18 organisations. All-metal book bindings have not been devoted enough attention although they represent a very interesting chapter in the history of book binding. An outcome of this work is a comprehensive description and detailed documentation of all researched all-metal book bindings. A valuable part is a catalogue of book bindings and of ornaments used in the decoration of all-metal book bindings.

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Mechanical Behaviour of Conventional Materials at Experimental Conditions of Deep Drawing Technological Process

Mechanical Behaviour of Conventional Materials at Experimental Conditions of Deep Drawing Technological Process

The paper deals with experimental investigations on the mechanical behaviour of body-centred-cubic (BCC) and face-centred-cubic (FCC)-conventionally structured sheet metalic-metalic materials under stress-strain conditions of a deep drawing process determined by a coefficient close to the limiting one for Steel 08 and punch diameter of 50 mm. The mechanical characteristics of the investigated materials are identified by one-dimensional tension tests. The materials' responses, as results of identical loading conditions, are described by the change of blank sizes and characteristics of the forming processes. The chosen deformation path ensures obtaining a qualitative steel piece and leads to failures of aluminium and brass blanks.

The reported results could be useful for investigations and predictions of the mechanical responses of such type metallic structures applying microscopic instrumented observations and numerical simulations.

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Electromagnetic Shielding Efficiency Measurement of Composite Materials

Electromagnetic Shielding Efficiency Measurement of Composite Materials

This paper deals with the theoretical and practical aspects of the shielding efficiency measurements of construction composite materials. This contribution describes an alternative test method of these measurements by using the measurement circular flange. The measured results and parameters of coaxial test flange are also discussed. The measurement circular flange is described by measured scattering parameters in the frequency range from 9 kHz up to 1 GHz. The accuracy of the used shielding efficiency measurement method was checked by brass calibration ring. The suitability of the coaxial test setup was also checked by measurements on the EMC test chamber. This data was compared with the measured data on the real EMC chamber. The whole measurement of shielding efficiency was controlled by the program which runs on a personal computer. This program was created in the VEE Pro environment produced by © Agilent Technology.

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The effect of blade thickness on microstructure and mechanical properties of ship's sand-cast propeller

The effect of blade thickness on microstructure and mechanical properties of ship's sand-cast propeller

The microstructure and resultant mechanical properties of the MM55 manganese brass applied to ship sand - cast propeller were investigated in relation to the propeller blade section thickness. It was stated that the increase of blade section thickness from 15 mm to 45 mm resulted in the increase of the volume fraction of α-phase by 5.3% and that of κ-phase by 23.7%, the decrease of the volume fraction of α-phase by 2.9%, the 0.2% proof stress R0.2 by 11.3%, the ultimate tensile strength Rm by 5.5% and the 5.65 √So elongation A5 by 16.8%.

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