2022 Technical Division Student Poster Contest: MPMD 2022 Technical Division Graduate Student Poster Contest
Program Organizers: TMS Administration
Monday 5:30 PM
February 28, 2022
Room: Exhibit Hall C
Location: Anaheim Convention Center
SPG-28: Microstructure and Mechanical Properties of Eutectic Ni-Ce and Ni-Ce-Al Alloys: Syeda Bushra Haider1; Elizabeth Heon1; Eric Lass1; 1University of Tennessee, Knoxville
Ni-based superalloys are used in high temperature applications for their excellent strength and corrosion resistance in such environments. However, these alloys suffer from poor manufacturability, particularly in terms of casting and solidification processing. Recently, researchers have developed eutectic aluminum-cerium alloys with good castability and high temperature properties. While the Ni-Ce system displays a similar eutectic, no study has yet examined Ni-Ce alloys as a possible high temperature material. In this study, novel Ni-Ce binary and Ni-Ce-Al ternary alloys are produced and characterized. The microstructural evolution of Ni-Ce-Al shows promising stability after extended annealing at elevated temperatures. Electron microscopy on as-cast ternaries shows interesting segregation behavior inside the Ni-rich dendritic regions, while the heat-treated material exhibits γ’ precipitation. The high temperature properties are investigated through hot hardness test and compared with commercially available Inconel-718.
SPG-29: Production via Machining and Rolling of High Resistivity Electrical Steel: Brhayan Puentes1; James Mann1; Srinivasan Chandrasekar1; Kevin Trumble1; 1Purdue University
Electrical steels are one type of soft magnetic materials. They are based on Fe-Si alloys, and they are widely used for magnetic cores in transformers and electric motors. It is well known that Fe-6.5Si wt% is the most efficient composition that has been developed so far. However, at such high silicon concentration (6.5wt.% = 12.1 at.% Si in Fe) the workability of the alloy is so bad that it makes it extremely difficult for industrial rolling production.Our project approaches this problem via two different solutions. First, we developed a machining-based technology that suppresses the mechanisms that lead to cracking during traditional rolling. Second, we develop a high-resistivity electrical steel alloy with up to 35% reduction of core losses (compared to commercial alloys with ~ Fe-3.2Si wt%) but maintaining good workability.
SPG-32: Water Transport through Porous Membranes - Modeling and Experiments: Harjot Singh1; Nicholas Ury1; Jaewan Bae1; Ali Mehrabi2; Naira Khosravian2; Vilupanur Ravi1; 1California Polytechnic State University Pomona; 2Avery Dennison
Understanding the mechanisms of water transport through single and multi-layered membranes is an important subject in paper and polymer processing. In this study, the transport mechanism of water through a sheet of paper coated with a thin layer of polymeric material was studied. A combination of modeling and experimental methods was utilized to quantify various phenomena contributing to water transport through this multilayer structure. A physical model for the transport of water via molecular diffusion and capillary imbibition through the polymeric coating defect space and the paper fiber phase was developed.