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SUMMARY:Extreme Environments and Dynamic Morphology: Anticipating and harn
 essing evolving structure-property relationships -  Jessica Krogstad\, Dep
 artment of Materials Science and Engineering University of Illinois\, Urba
 na-Champaign
DTSTART:20180628T103000Z
DTEND:20180628T113000Z
UID:TALK105682@talks.cam.ac.uk
CONTACT:Catherine Pearson
DESCRIPTION:Faced with longer service lifetimes\, higher operating tempera
 tures\, more complex loading configurations\, and aggressive environments\
 , reliable operation of many key technologies hinges upon the durability o
 f materials or material systems.  In these extreme environments\, understa
 nding the evolution of material properties may be even more important than
  the initial performance of the material. The oil and gas industry\, for e
 xample\, is ripe with “extreme conditions” ranging from the chemical c
 omplexity of the carbon-based stock material to the high temperatures or p
 ressures found during extraction\, processing or use of said materials.  O
 ur research focuses on linking thermodynamic and kinetic considerations to
  key morphological factors in structural materials\, which ultimately dict
 ate failure mechanisms.  Using the conditions relevant to the oil and gas 
 industry\, we set out to establish these relationships and then harness th
 e dynamic morphologies to enhance performance.  Specifically\, we will exp
 lore the interactions between carbonaceous materials and common structural
  alloys under relevant conditions.  We will focus on the closely coupled c
 ontributions of both surface chemistry and surface morphology and then dis
 cuss strategies for mitigating deposition through surface passivation.  In
  order to understand the underlying mechanisms for such surface passivatio
 n\, we have used DC magnetron sputtering to systematically study the oxida
 tion and microstructural evolution in a model alloy system.  We will concl
 ude by discussing the potential and implications of using these nanocrysta
 lline\, thin film alloys to accelerate traditional physical metallurgy\, w
 ith specific emphasis on phase transformation and mechanical degradation p
 athways in other extreme environments found in power generation applicatio
 ns.\n\nJessica A. Krogstad is an assistant professor in the Department of 
 Material Science and Engineering at the University of Illinois\, Urbana-Ch
 ampaign. She received her PhD in Materials at the University of California
 \, Santa Barbara working with Prof. Carlos G. Levi in 2012.  Her doctoral 
 work examined phase evolution and structural stability in zirconia-based t
 hermal barrier coatings.  Between 2012 and 2014\, she held a postdoctoral 
 appointment in the Department of Mechanical Engineering at Johns Hopkins U
 niversity with Prof. Kevin J. Hemker.  There she focused on the investigat
 ion of high temperature metallic systems for MEMS applications and high te
 mperature micro-mechanical testing for experimental validation of multi-sc
 ale damage models of superalloy and composite materials in the spirit of i
 ntegrated computational materials engineering (ICME).  Her current researc
 h explores the interplay between phase or morphological evolution and mate
 rial functionality in structural materials under extreme conditions. She i
 s the recipient of the DOE Early Career Award\, the NSF CAREER Award and t
 he TMS Young Leaders Award.\n
LOCATION:Open Plan Area\, BP Institute\, Madingley Rise CB3 0EZ
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