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Authors: Eric Guyer, Robert Kupkovits
Flexible hose connectors are common for fluid transmission applications where there is a need to accommodate the relative motion of system components. This work involved the failure of a flexible hose in a heating, ventilation, and cooling (HVAC) system which resulted in property damage.
Authors: A. Mandal, S. Deepak Kumar, M. Chakraborty
The present work highlights the synthesis, processing and characterization of Aluminium based in-situ metal matrix composites (MMCs) reinforced with titanium diboride (TiB2) particles created by an exothermic reaction of K2TiF6 and KBF4 with molten aluminium.
Authors: Frederick Lia, Joshua Z. Park, Jay F. Tressler, Richard P. Martukanitz
A thermo-absorption mode l for calculation of the heat transfer is proposed and experimentally validated for a laser directed energy deposition process. The bulk absorption (P) may be defined as the ratio of the total power absorbed by the substrate (P abs) to the laser power presented to the substrate (Pi).
Authors: ZHOU Tongjun
This paper describes the development of argon protection in the ingot casting process, and the production process of totally enclosed argon protection in a 40-tons production line. The influences of some related factors on the oxygen content are analyzed.
Authors: Potapov A. A, Orlov G. A, Shestakova E. N
The article present high-carbon hypereutectoid steel for the production of hot rolling forged rolls. The steel contains 1.2 - 1.4 % carbon, carbide forming alloying elements Cr, Mo, V and Nb to improve the wear resistance of the roll, and Ni to increase the hardenability. Hot ductility of the steel has been investigated considering segregation of chemical elements in ingots weighing up to 20 tons.
Numerical Modeling Of The Dispersion Of Ceramic Nanoparticles During Ultrasonic Processing Of 6061-Based Nanocomposites
Authors: D. Zhang, P.G. Allison, T.W. Rushing and L. Nastac
The metal-matrix-nano-composites (MMNCs) in this study consist of a 6061 alloy matrix reinforced with 1.0 wt.%SiC nanoparticles that are dispersed within the matrix using an ultrasonic cavitation dispersion technique available in the Solidification Laboratory at UA. The required ultrasonic parameters to achieve (i) the required stirring and cavitation for suitable degassing and refining of the aluminum alloy and (ii) the adequate fluid flow characteristics for uniform dispersion of the nanoparticles into the 6061 matrix are being investigated in this study by using an in-house developed CFD ultrasonic cavitation model.
Microstructures And Mechanical Properties Of Extruded Powder Metallurgy Pure Ti Materials By Gas-Solid Reaction Process
Authors: Takanori Mimoto, Junko Umeda, Katsuyoshi Kondoh
In this study, pure titanium (Ti) powders containing solid solution nitrogen (N) atoms were prepared by a gas (nitrogen)-solid (pure Ti starting powder) direct reaction process to imporve mechanical performaces of extruded pure ti materials at ambient temperature.
Horizontal Single Belt Casting Of Aa6111 Auto-Alloy, Including Predictions And Measurements Of Interfacial Heat Transfer And Solidification During The First Critical Moments Of Melt-Substrate Contact
Authors: Roderick I L Guthrie, Mihaiela Isac
Near Net Shape Casting (NNSC) processes currently include CASTRIP's Twin Roll Casting, and Hazelett's Twin Belt Casting. A more recent NNSC process is the HSBC (Horizontal, Single Belt Casting).
Authors: S. Khasa , M. S. Dahiya , A. Agarwal
Glasses based on heavy metal oxides such as B i2O3 are of great technological interest because of their wide applications in glass ceramics, layers for optical and electronic devices such as optical kerr shutter (OKS) switching. So, glasses with compositions xMgCl2(30- x )MgO20Bi2O3-50B2O3 containing 2 mol% doping o f V 2O5 (x = 12, 15, 20, 25, 30) have been prepared by melt quenching technique.
Authors: Vit Janik, Peter Beentjes, David Norman, Guido Hensen, Sridhar Seetharaman
Zinc coated steels for hot press forming are intended to offer active corrosion resistant ultrahigh strength steel for applications in the automotive industry. During hot-press forming, zinc can infiltrate the underlying grain boundaries during the heat and forming step, leading to intergranular cracking of the base metal.