Late News Poster Session: Light Metals
Program Organizers: TMS Administration

Monday 5:30 PM
February 28, 2022
Room: Exhibit Hall C
Location: Anaheim Convention Center

E-29: Development of Heat Dissipation Housing for Sensing Device through Material Development and Prediction of Heat Dissipation Phenomenon: JiHyeon Byeon¹; JungHan Kim¹; CheolJin Yoon¹; SungHo Kim¹; SangHo Hwang¹; Oeon Kwon¹; ¹Gyeongbuk Institute of IT Convergence Industry Technology
    Electric/electronic parts used in the overall industry, such as electric, electronic, and automobile fields, have become lighter, smaller, and multifunctional due to the advancement of functions. Accordingly, components with various functions generate a lot of heat unlike simple electronic components. The heat generated by this deteriorates the function of the element inside the part, causes malfunction, and has the greatest influence on the lifespan and reliability of the part. In this paper, heat dissipation material development and housing were developed to improve heat dissipation efficiency. To improve heat dissipation performance, Al-based alloys were designed and manufactured. Based on this, mechanical and thermal properties were analyzed to predict heat dissipation through CAE. Based on heat dissipation analysis, material and shape optimization was performed.

E-30: Influence of Atmosphere and Temperature on PAH Emission from Green Anode Paste: Kamilla Arnesen¹; Thor Aarhaug²; Kristian Einarsrud¹; Gabriella Tranell¹; ¹Norwegian University of Science and Technology; ²SINTEF
    The metallurgical industry emits, to a varying degree, polycyclic aromatic hydrocarbons (PAHs), a group of organic molecules consisting of two or more joined aromatic rings. These are primarily formed by incomplete combustion or pyrolysis of organic materials and are naturally present in carbon materials for Al-electrolysis anode production. To better control the off-gas treatment, learning how process parameters affect the formation and type of PAH is important. Laboratory scale experiments were performed using industrial green anode paste. Different temperatures (25 - 750 °C) and atmospheres were used to investigate their effect on the PAH emissions. Concentration and species distribution of PAH-16 was analyzed and compared to the existing PAH-16 in the green anode paste. Compared to inert atmosphere, adding 5 % oxygen, reduced the PAH-16 concentration by 55 %, from 65.6 to µg/ml to 29.3 µg/ml, and reduced further with 10 % oxygen.

E-32: Microstructure and Mechanical Properties of Al-Cu-Ca Based Alloys with Sn Addition: Jung Han Kim¹; Jihyeon Byeon¹; Cheol-Jin Yoon¹; Sung-Ho Kim¹; Sang-Ho Hwang¹; O-Eon Kwon¹; ¹Gyeongbuk Institute of IT Convergence Industry Technology
    There are many kinds of approach to meet the demands where consider the environmental problem and the resource exhaustion. The highest performance and concurrent weight and cost reduction became more important in transportation industries such as automobile, aircraft, vessel and railway vehicle. So many researchers are focusing on lightweight structures which are economical and environmentally. Aluminum alloys, is an increasing trend in the automotive industry to use these materials various components. Also Thermal conductivity influences the performance of alloys as a crucial function and is essential to extend the life of the materials due to uniform temperature distribution. In this present study, Al-Cu-Ca based alloys with Sn alloys in 800℃ using a carbon crucible and poured into a mold. The microstructures of casted specimens were examines by X-ray diffraction (XRD), scanning electron microscopy (SEM), optical microscopy (OM). The mechanical properties of casted specimens were tensile test at room temperature.

E-33: Newly Developed Ceramic Foam Filters for Filtration and Hydrogen Removal in Aluminum Casthouses: Alexander Mach¹; Frank Reusch¹; Claus Disser¹; Jochen Schnelle¹; Marcel Rosefort²; Phil Jankowski²; Giuseppe Esposito²; ¹Drache; ²TRIMET
     In Aluminum casthouses ceramic foam filters (CFF) are the well-established technology for the reduction of inclusions in billets and rolling ingots. The removal of dissolved hydrogen in molten Aluminum in order to reduce porosity is typically done by a gas purging process using Argon or Nitrogen, possibly mixed with Chlorine. With a newly developed CFF material, it is possible to remove inclusions as well as to reduce dissolved hydrogen in the melt.The Poster presentation will provide information on the new filter materials that have a positive impact on the hydrogen levels during the filtration process. Casting trials were performed at TRIMET (Essen, Germany) using Hycal and Leco measuring equipment to determine hydrogen concentrations. Data was collected on two casts of a 5xxx alloy with a duration of 1.5 hours per cast. Furthermore, slices from the billets were cut, prepared, and metallurgically examined for inclusions.

NOW ON-DEMAND ONLY - E-34: The Modification Effect of Ultrasonic Irradiation Amplitude during Melt Treatment on Al3Zr Compounds: Jincheng Sun¹; Sergey Komarov¹; Takuya Yamamoto¹; ¹Tohoku University
    Recent trends in the aluminum industry toward increasing the recycling rate of aluminum alloys have led to difficulties in controlling the formation of intermetallic compounds. Recent investigations have revealed that ultrasonic irradiation is a promising tool to refine and modify the intermetallic compounds formed in the melt before or during casting, and the reported mechanisms include ultrasound-assisted nucleation and fragmentation of compounds. This work presents results concerning the modification effect of ultrasound on model Al3Zr compounds with emphasis on the effect of vibration amplitude. The results reveal that needle-like Al3Zr compounds can be significantly modified to more rounded shape when amplitude increases from 38痠 to 48痠, and then remains unchangeable with the further increase of amplitude. Theoretical consideration and numerical simulation show that in addition to the above-mentioned mechanism, the ultrasound-driven mass and heat transfer play also an important role in the compound modification.