Date:
Monday, February 28, 2022
Location:
Anaheim Convention Center, Room 210A
Sponsored by:
TMS Light Metals Division, TMS Magnesium Committee
Organizers:
Petra Maier, University of Applied Sciences Stralsund; Steven Barela, Terves, Inc; Victoria Miller, University of Florida; Neale Neelameggham, IND LLC
The Magnesium Technology 2022 symposium at the TMS 2022 Annual Meeting & Exhibition will open with a session of invited presentations on Monday morning. Following the keynote, related sessions will be held throughout the week as part of the Magnesium Technology symposium, one of the largest annual gatherings of magnesium specialists in the world.
Featured Speakers
Alan Luo, Ohio State University
Presentation Title: "Magnesium Alloy Development for Structural and Biomedical Applications"
About the Presentation
This talk presents an overview of magnesium alloy development at The Ohio State University in collaboration with its industrial partners. Firstly, a new magnesium sheet alloy has achieved a yield strength of 270 MPa, tensile elongation of 31% and Erichsen index of 7.8 mm, promising room-temperature forming applications. This alloy also has excellent extrudability and mechanical properties in extruded products. The second example is a high-strength magnesium alloy containing long period stacking ordered (LPSO) and age-hardening precipitation phases, for casting applications. The final example is a Mg-Zn-Ca based bioresorbable alloy with outstanding mechanical and corrosion properties for biomedical such as skeletal fixation and cardiac stent devices. In all these examples, alloy design and process (casting and their thermomechanical processing) development have been achieved using an integrated computational materials engineering (ICME) approach.
About the Presenter
Alan A. Luo is professor of materials science and engineering and integrated systems engineering at The Ohio State University (OSU) in Columbus, Ohio. He is an elected fellow of ASM International and the Society for Automotive Engineers (SAE). Luo is a past chair of TMS Light Metals Division (LMD) and SAE Materials Engineering Division. Prior to joining OSU in 2013, he was a GM technical fellow at General Motors Research and Development Center (Warren, MI) with 20 years of industrial experience. Luo has 21 patents and more than 300 technical publications on advanced materials and manufacturing, specializing in lightweight materials and applications. He has received several awards from TMS, including the Bruce Chalmers Award, Brimacombe Medalist Award, LMD Technology Award, LMD Distinguished Service Award, and best paper awards from the Magnesium Technology symposia.
Timothy Weihs, Johns Hopkins University
Presentation Title: "Unlocking the Strengthening Potential of Magnesium Alloys Using Deformation-induced Clustering and Precipitation"
About the Presentation
Light metals of aluminum (Al) and magnesium (Mg) hold great promise in many structural applications. However, the overall progress in strengthening these metals has been remarkably different. While significant improvement has been achieved in developing high-strength Al alloys, the anisotropic hexagonal crystal system and complex plasticity mechanisms have made the design of high-strength Mg alloys a challenging exercise. Our recent studies have examined two binary Mg chemistries, mainly the Mg-Al and Mg-Zn systems. These rare-earth-free alloys offer a chance to conduct fundamental studies of precipitation mechanisms and processing pathways that can help alter the nucleation events leading to precipitate formation. We demonstrate that careful control of atomic-scale defects such as dislocations and vacancies can significantly alter the nucleation barrier, promote solute clustering far from and along dislocation lines, along twin boundaries and within twins, and along grain boundaries. These novel microstructures show promise in boosting precipitation strengthening in Mg alloys.
About the Presenter
Timothy P. Weihs is a professor of materials science and engineering at Johns Hopkins University and his current research focuses on reactive, structural, and bio-materials. His studies of reactive materials investigate basic mechanisms such as nucleation and phase transformations, as well as more applied topics such as the development of and structural energetic materials and composite reactive powders for bio and chem-agent defeat. He is also developing reactive powders for 3D printing of conductive metallic lines on flexible substrates. Regarding structural materials, Weihs is leveraging bulk, thermo-mechanical processing to refine the microstructure of magnesium alloys for body armor through deformation-induced solute clustering and precipitation. Lastly, he is developing and characterizing magnesium alloys for bone fixation and 3D magnesium weaves as bone scaffolds.
Regine Willumeit-Romer, Helmholtz-Zentrum Hereon
Presentation Title: "The Comparability of In Vitro and In Vivo Experiments for Degradable Mg-implants"
About the Presentation
Magnesium implants pose a great potential for clinical applications. Thousands of patients are already successfully treated with magnesium implants, and more products get approval. Despite the fact that it works, we know that we have not yet reached full understanding of all processes which occur during the degradation of the material and tissue regeneration. We might perhaps never come to a complete description of the physical, chemical, and biological processes during healing. And perhaps it is not necessary to fully unravel all details of the reactions and interactions. We already can conclude that in vitro experiments can predict many observations found in vivo with a sufficient precision. This presentation will give an overview of what we know for in vitro, in vivo degradation as well as in vivo imaging (synchrotron radiation tomography) and histology, their limitations, and how to overcome them.
About the Presenter
R. Willumeit-Römer studied and obtained a Ph.D. in physics by working on the structure of ribosomes. Interest areas include habilitation and venia legendi in biochemistry. After working on peptide antibiotics and antimicrobial implant surfaces, she focused on degradable Mg-based implants. Her current position is director of the Institute for Metallic Biomaterials, Helmholtz-Center Hereon, and professor at the Faculty of Engineering, Christian-Albrechts-University, Kiel, Germany.
Rajiv Tandon, Luxfer Magtech
Presentation Title: "An Update on Magnesium-Based Powder Metallurgy and Additive Manufacturing Processes"
About the Presentation
Pure magnesium powders are used in a variety of applications including infrared countermeasure flares, flameless-ration heaters, welding electrodes, pyrotechnics, and steel desulfurization. Powder metallurgy offers potential processing routes to tailor compositions and unique microstructures to achieve high mechanical properties in magnesium alloys. Secondary phase reinforcements including nanoparticle additions can be utilized to achieve unique combinations of strength, lightweight, wear and toughness, thus pushing the envelope of high-performance lightweight applications. Furthermore, magnesium-based alloys have also been widely investigated as bioresorbable implants due to their adjustable corrosion properties. This has led to emerging interests in the potential to fabricate magnesium based bespoke structures via additive manufacturing processes. This presentation will focus on the potential and challenges associated with using magnesium alloy powders for powder metallurgy and additive manufacturing processes.
About the Presenter
Rajiv Tandon is director of technology at Luxfer Magtech Inc. and leads the technology and product development for magnesium powder-based products. Tandon has over 20 years of experience in various ferrous and non-ferrous powder-based manufacturing processes, including metal injection molding, powder consolidation, powder characterization, metallurgical analyses, and atomization. He has over 25 technical publications and is a member of TMS, the Metal Powder Industries Federation, and ASM International. Tandon also serves on the editorial review board for the International Journal of Powder Metallurgy and on the Board of Directors of the American Powder Metallurgy Institute.
Aaron Palumbo, Big Blue Technologies
Presentation Title: "Historical Developments and Status of Carbothermal Reduction Technology to Produce Magnesium Metal"
About the Presentation
Carbothermal reduction (CTR) technology for magnesium metal production was realized by F.J. Hansgirg in the 1930s, but the process was unprofitable after the end of World War II. Since then, many attempts have been made to demonstrate inherent advantages of CTR: low energy intensity and corresponding economic value proposition by reducing the production costs. The operating paradigms of historical and current attempts used to prove technical feasibility have been centralized on the condenser, where magnesium-vapor and byproduct CO-gas are separated by phase change. Preventing reversion, or re-oxidation of magnesium products, was the focus of most efforts as embodied by the development of a converging-diverging nozzle and the use of inert solvents, such as oils, molten metals, and salts. These historical developments in CTR-technology provide context to guide a holistic approach to designing a robust and economically viable CTR-process where the condenser is just one part.
About the Presenter
Aaron Palumbo has been working on sustainable chemical process development for the past 15 years. His work includes algal growth and extraction systems, thermochemical biomass conversion, solarthermal energy systems, water splitting, magnesium metal production, and lithium-ion battery recycling. He received his Ph.D. in Chemical Engineering from the University of Colorado at Boulder in 2014. Afterwards, he worked as a post-doctoral researcher on the foundational effort to develop a carbothermal reduction process technology for primary magnesium metal production. After co-founding Big Blue Technologies in 2015 with Boris Chubukov, Palumbo has worked on a variety of sustainability process initiatives with emphasis on the scale-up effort for magnesium.