Date:
Monday, March 11, 2019
Time:
8:00 a.m. to 11:30 a.m.
Location:
Henry B. Gonzalez Convention Center, Room 005
Sponsored by:
TMS Light Metals Division, TMS Magnesium Committee
Session Chairs:
Vineet Joshi, Pacific Northwest National Laboratory, and J. Brian Jordon, University of Alabama
This half day of invited keynote speakers kicks off programming for the Magnesium Technology 2019 symposium, the latest installment in the popular, long-running Magnesium Technology symposium at the TMS Annual Meeting & Exhibition.
Featured Speakers:
Christopher Romanowski, Danieli FATA Hunter
Presentation Title: "Magnesium Alloy Sheet for Transportation Applications"
About the Presentation
Wrought magnesium alloy sheet has a long history in the aerospace sector and more recently has become popular for personal electronic applications, but has yet to make the transition to high-volume applications in the transportation sector. While there are clear market opportunities for magnesium sheet in lightweight vehicles, the adoption of the material has been limited by the price, the limited number of suppliers and distribution channels, and the silicothermic production process. Although the use of a multi-stand mill would reduce the conversion cost and thus the price of magnesium sheet, the current market volume cannot justify investment in such an expensive high-capacity plant. This talk will review these factors and describe the possibility of using twin roll casting and a novel single stand mill design as an alternate, cost-effective, method to produce low-cost magnesium alloy sheet to promote its implementation in the transportation market.
About the Presenter
Christopher Romanowski is currently Danieli Fata Hunter’s VP of Sales and Proposals for North America, but during his 35 years with the company, he has worked in a number of areas, ranging from Field Services commissioning new equipment, to the Technical Department developing new process technologies. One of these developments was the commercialization of magnesium twin roll casting. His previous work experience included Alumax where he was the Technical Manager of a twin roll caster based aluminum sheet plant, Pechiney Aluminum where he transferred technology from the R&D center in Voreppe to their North American facilities, and Drexel University where he was an Associate Professor working on various projects including the development of molten aluminum filtration technology. Romanowski has a BSc and PhD in metallurgy from the University of Surrey in the UK.
Sarah Kleinbaum, U.S. Department of Energy
Presentation Title: "Magnesium for Automotive Lightweighting: Status and Challenges"
About the Presentation
Cast and wrought magnesium components have long been identified as a key pathway to automotive lightweighting and improved energy efficiency. However, adoption in the automotive market remains low. This talk will look at the application of magnesium components into various vehicle subsystems from 2012 through today and identify the technical challenges that currently limit full adoption.
About the Presenter
Sarah Kleinbaum is the Technology Manager for Joining of Dissimilar Materials in the Department of Energy’s Vehicle Technology Office. In this role, she assesses the challenges facing the automotive industry to implement lightweight materials in vehicles and sponsors technical research projects including academia, national laboratory, and industry partners to address those challenges. Kleinbaum also serves as co-director of the LightMAT consortium which seeks to enhance the collaboration between industry and national labs in order to accelerate the development and implementation of lightweight automotive materials. Prior to her work at the Department of Energy, Kleinbaum managed the Materials Analysis and Approval Laboratory for North America at Whirlpool Corp. She received both her Masters of Science and Bachelor’s degrees in Materials Engineering from Purdue University.
David Klaumuenzer, Volkswagen AG
Presentation Title: "Magnesium Process and Alloy Development for Applications in the Automotive Industry"
About the Presentation
The Volkswagen Group shares a long tradition in applying magnesium as a lightweight material in passenger vehicles. This talk will review past and present applications, ranging from the VW beetle to the current Porsche 911 GT3 RS. It will then point out the challenges that need to be overcome to extend the range of magnesium components in future cars. Focusing on the example of magnesium sheets, this presentation will show how alloy development can help to enhance material performance and thus reduce costs in an automotive production environment. As part of this work, this talk will describe a recent prototype manufacturing project for a magnesium Passat decklid and highlight the benefits achieved by utilizing these newly developed magnesium sheets.
Sean Agnew, University of Virginia
Presentation Title: "Thermally Activated Slip in Rare Earth Containing Mg-Mn-Ce Alloy, ME10, Compared with Traditional Mg-Al-Zn Alloy, AZ31"
About the Presentation
Crystallographic texture in wrought Mg alloys causes them to exhibit anisotropic deformation behavior. This anisotropy is correlated with the activation of distinct deformation mechanisms when loaded along different directions. This offers the possibility of assessing the thermally activated nature of these different deformation mechanisms. The repeated stress relaxation method has been proposed as a means to assess the physical activation volume for dislocation motion, which is less susceptible to problems associated with machine compliance and changes in the mobile dislocation density, as compared with traditional stress relaxation methods. This method has typically made use of oriented single crystals or cubic polycrystals for which the connection with slip system level behavior is obtained through the use of a Taylor factor. In the present case, polycrystal plasticity modeling is used to discriminate the relative activity of slip systems in textured, polycrystalline Mg alloy samples loaded along different directions.
About the Presenter
Sean R. Agnew began studying Mechanical Engineering at Clarkson University in his home town, Potsdam, New York. He completed his undergraduate studies in 1994 at Cornell University, where he had pursued a double-major in Mechanical Engineering and Materials Science and Engineering. In 1998, he completed his doctoral dissertation “Ultrafine Grained Copper Produced by Severe Plastic Deformation” under the guidance of the late Julia R. Weertman. In 1999, Agnew received a Eugene P. Wigner Postdoctoral Fellowship at the Oak Ridge National Laboratory, where he worked in the Alloy Behavior and Development group. It was there that he began studying magnesium alloys, upon the recommendation of his mentors, C.T. Liu and Man H. Yoo. Since the summer of 2001, he has served on the faculty of the University of Virginia, where he pursues his interests in researching and teaching about the mechanical behavior of materials, crystal defects, and diffraction-based methods of characterization.