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     Calendar Details - October Technical Meeting

October Technical Meeting

Date: 10/10/2011
4:30 PM - 7:00 PM

Save the date, Monday, October 10, 2011, for the AFS-ASM Technical Meeting at the Pere Marquette Hotel.
October 2011
Technical Meeting

Monday, Oct. 10

Protective Materials: IEDs, EFPs, MRAPs, and Lightweight Steels

David C. Van Aken
Missouri University of Science & Technology

Date: Monday, October 10, 2011          
Location: Pere Marquette Hotel, Peoria, IL
4:30-5:30      Social Hour
5:30-6:00      Dinner / Announcements
6:00-7:00      Technical Talk

Parking is available on the street or in the hotel parking deck.  ASM/AFS members that park in the hotel deck can bring their parking ticket to the meeting to be validated.  The cost of dinner is subsidized and will be $18 at the door ($5 students).  ASM/AFS members may purchase a ticket for $40 that will cover four dinners during the 2011-2012 season.  For reservations, please contact Catherine Stecklein at 309.675.1276 or Stecklein_Catherine@cat.com. 

Abstract: This talk reviews the development of lightweight steel for cast P900 armor that has been studied at Missouri S&T for the past 4 years.  Work has mainly focused on a composition of Fe-30Mn-9Al-1Si-0.9C-0.5Mo with all compositions in weight percent. The combination of a low density (6.7 g/cm3) and a peak aged tensile strength of 1000 MPa (145 ksi) give these lightweight steels up to a 13% improvement in specific strength over current cast 4130 steel armor used in P900.  Ballistic tests on the lightweight steel met MIL-PRF-32269 requirements and high strain rate compression tests show work hardening behavior to ultimate strengths of 1650 MPa (240 ksi).  These lightweight steels have good fluidity and have demonstrated fill lengths that are 70% greater than 4130 steel. Challenges in casting lightweight steel are the control of phosphorus, eliminating dross entrapment during casting, and preventing reoxidation of the melt. Phosphorus and steel cleanliness adversely affect notch toughness, but when controlled adequately the lightweight steel will attain impact energies of 39 J at -40°C in the age hardened condition. To date, the best lightweight steel P900 ballistic performance has been attained with plates cast into preheated ceramic shell molds. 

Speaker: David C. Van Aken is a Curators’ Teaching Professor of Metallurgical Engineering at the Missouri University of Science and Technology (formerly University of Missouri-Rolla).  He is also a Senior Investigator at the Graduate Center for Materials Research.  Dr. Van Aken graduated with a BS in metallurgical engineering from University of Illinois and began his engineering career in 1978 at Caterpillar, Inc., as a materials engineer.  He returned in 1982 to the University of Illinois for his Ph.D. studies.  He joined the Missouri S&T faculty in 1993 after having taught at the University of Michigan for seven years.  Dr. Van Aken has been the recipient of 14 awards for teaching excellence, 4 Missouri S&T faculty excellence awards, and a Missouri S&T Alumni Association outstanding advising award.  Dr. Van Aken is a licensed Professional Engineer in the states of Missouri and Illinois. He is the author of more than 90 technical articles, recipient of 3 patents, and is co-author with Bill Hosford of the book Reporting Results: a practical guide for engineers and scientists.  His research interests include the physical metallurgy of ferrous alloys, experimental and theoretical aspects of phase transformations, and the mechanical behavior of structural materials.  He is currently working on the development of lightweight steels for the transportation industry. Dr. Van Aken has been teaching the Ferrous Microstructures course at Caterpillar since 2005.

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