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CATEGORIES:Institute for Energy and Environmental Flows (IEEF
 )
SUMMARY:Extreme Environments and Dynamic Morphology: Antic
 ipating and harnessing evolving structure-property
  relationships -  Jessica Krogstad\, Department of
  Materials Science and Engineering University of I
 llinois\, Urbana-Champaign
DTSTART;TZID=Europe/London:20180628T113000
DTEND;TZID=Europe/London:20180628T123000
UID:TALK105682AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/105682
DESCRIPTION:Faced with longer service lifetimes\, higher opera
 ting temperatures\, more complex loading configura
 tions\, and aggressive environments\, reliable ope
 ration of many key technologies hinges upon the du
 rability of materials or material systems.  In the
 se extreme environments\, understanding the evolut
 ion of material properties may be even more import
 ant than the initial performance of the material. 
 The oil and gas industry\, for example\, is ripe w
 ith “extreme conditions” ranging from the chemical
  complexity of the carbon-based stock material to 
 the high temperatures or pressures found during ex
 traction\, processing or use of said materials.  O
 ur research focuses on linking thermodynamic and k
 inetic considerations to key morphological factors
  in structural materials\, which ultimately dictat
 e failure mechanisms.  Using the conditions releva
 nt to the oil and gas industry\, we set out to est
 ablish these relationships and then harness the dy
 namic morphologies to enhance performance.  Specif
 ically\, we will explore the interactions between 
 carbonaceous materials and common structural alloy
 s under relevant conditions.  We will focus on the
  closely coupled contributions of both surface che
 mistry and surface morphology and then discuss str
 ategies for mitigating deposition through surface 
 passivation.  In order to understand the underlyin
 g mechanisms for such surface passivation\, we hav
 e used DC magnetron sputtering to systematically s
 tudy the oxidation and microstructural evolution i
 n a model alloy system.  We will conclude by discu
 ssing the potential and implications of using thes
 e nanocrystalline\, thin film alloys to accelerate
  traditional physical metallurgy\, with specific e
 mphasis on phase transformation and mechanical deg
 radation pathways in other extreme environments fo
 und in power generation applications.\n\nJessica A
 . Krogstad is an assistant professor in the Depart
 ment of Material Science and Engineering at the Un
 iversity of Illinois\, Urbana-Champaign. She recei
 ved her PhD in Materials at the University of Cali
 fornia\, Santa Barbara working with Prof. Carlos G
 . Levi in 2012.  Her doctoral work examined phase 
 evolution and structural stability in zirconia-bas
 ed thermal barrier coatings.  Between 2012 and 201
 4\, she held a postdoctoral appointment in the Dep
 artment of Mechanical Engineering at Johns Hopkins
  University with Prof. Kevin J. Hemker.  There she
  focused on the investigation of high temperature 
 metallic systems for MEMS applications and high te
 mperature micro-mechanical testing for experimenta
 l validation of multi-scale damage models of super
 alloy and composite materials in the spirit of int
 egrated computational materials engineering (ICME)
 .  Her current research explores the interplay bet
 ween phase or morphological evolution and material
  functionality in structural materials under extre
 me conditions. She is the recipient of the DOE Ear
 ly Career Award\, the NSF CAREER Award and the TMS
  Young Leaders Award.\n
LOCATION:Open Plan Area\, BP Institute\, Madingley Rise CB3
  0EZ
CONTACT:Catherine Pearson
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