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Authors: Ashok Sharma, Robin Gupta, Lorenz Ratke
The Rheo-Metal process, also known as Rapid Slurry Forming (RSF) process is a new semi-solid metal (SSM) process to produce semi-solid slurries for quality cast component at low cost.
Authors: Kyle Deane, S.L. Kampe, Douglas Swenson, Paul Sanders
The equilibrium solubility limits of Sc and Zr in Al are only 0.21 at% and 0.08 at% respectively, limiting the maximum achievable strengthening effect of nanoscale ALSc and ALZr precipitates. This solubility limitation can be circumvented through the use of rapid solidification techniques, such as melt spinning, as primary precipitation can be suppressed and a higher degree of initial supersaturation can be achieved.
Authors: Adeline Maitre, Douglas G. Ivey and Hani Henein
High strength low alloyed steels (HSLA) are an important class of steels used for pipeline transmission applications. Precipitates of various sizes, chemistries and volume fractions have been reported in the literature for these steels. The largest of these, microns in size, form during continuous casting. Many efforts have been focused on minimizing their formation as they deplete the matrix valuable microalloying elements that can precipitate in the solid steel during subsequent controlled thermo-mechanical processing resulting in further improved steel properties.
Authors: Adekunle Adegbola, Julius Olapade, Ismaila Alabi, Akeem Ghazali, Emmanuel Ekundayo, Olugbenga Fashina , Mutiu Kareem , Abolade Olaniyan , David Oke
The development and morphology of Al-9.37Cu alloy was characterized through metallographic examination and failure rate. The alloy was obtained by employing Die -Casting Technique before being subjected to series of mechanical and materials tests.
Authors: V. Venkatachalam, S. Molin, M. Chen, I. Smirnov, P.O. Larsson, P.V. Hendriksen, N. Bonanos
Metal supported protonic fuel cells (PCFC) offer one major advantage over standard solid oxide fuel cells (SOFC) with oxygen conducting electrolytes, namely that the product, water, is produced on the cathode (air) side. This feature simplifies the engineering of the stack, boosts efficiency, and is particularly helpful for a porous metal supported cell because it limits the corrosion of the metal by exposure to water vapor in anode gas.
Authors: M. J. Roy, D. M. Maijer, Y. Nadot
Aluminum foundry alloys such as A356 are used extensively in applications where high cycle fatigue (HCF) resilience is a key design consideration. Fully reversed, multiaxial HCF studies on this alloy in the T6 condition have shown that endurance limits are governed by maximum principal stress and driven by crack propagation as opposed to initiation.
Authors: K. Myers, P. Cortes, B. Hetzel and K.M. Peters
The present work has investigated the 3D printing processing parameters o f ceramic templates based on silica and mullite material. It was observed that particles with diameters larger than 50 |im yielded a satisfactory spreadability during the printing process. Here, the printed parts constituted by hollow spherical mullite particles were subjected to a molten aluminum bath in order to in duce an infiltration process on the ceramic templates.
Authors: Tie Liu, Richard, Zhiyong Wu, Daqin Xu
One piece of weld neck flange of a seawater-intake-return-line was found corroded. The flange was fabricated from super-duplex stainless steel S32750 and had been in service for only 4 months. The process fluid in the system was stagnant seawater.
Authors: David Weiss, Gerald Gegel
Aluminum alloy castings have been successfully used in many applications to reduce weight and therefore increase fuel efficiency. Except for engine components, most of these operate at ambient temperatures. Most engine components operate at temperatures up to about 200°C. Currently available Al-Cu and Al-Cu-Mg casting alloys have a maximum effective operating temperature of about 200°C which is equal to their aging temperature.
Authors: J.P. White, N. Read, R.M. Ward, R. Mellor, M.M. Attallah
Experiments have been carried out to find the best processing parameters based on their impact on the microstructural and structural integrity development. To support these studies, measurements of the meltpool geome try normal to the scanning direction have been taken.