Research Seminars @ Illinois

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Tailored for undergraduate researchers, this calendar is a curated list of research seminars at the University of Illinois. Explore the diverse world of research and expand your knowledge through engaging sessions designed to inspire and enlighten.

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Hassel and Marianne Ledbetter MatSE Colloquium - "Radiation resistance and mechanical response of materials in extreme environments"

Event Type
Department of Materials Science and Engineering
100 Materials Science and Engineering Building, 1304 W. Green Street
Mar 18, 2024   4:00 pm  
Izabela Szlufarska, Department of Materials Science and Engineering, University of Wisconsin-Madison
Bailey Peters
Originating Calendar
MatSE Colloquium Calendar

Radiation resistance and mechanical response of materials in extreme environments

Development of energy-efficient and safe technologies for energy production, transportation, and defense poses ever-increasing demands on materials stability in harsh environments. Ceramics are attractive in this regard because of their high-temperature stability, good corrosion and radiation resistance, and excellent mechanical strength. This talk will be focused on fundamental issues related to stability of ceramics and intermetallics in extreme environments. First, I will discuss the role interfaces play in response to radiation and corrosion. I will demonstrate that in ceramics, the effects of interfaces are closely coupled to the complex defect energy landscape, leading to surprising new phenomena. For example, we discovered that even though ceramics form line compounds, radiation causes segregation of constituent elements to grain boundaries without precipitating new phases, which impacts corrosion resistance. Secondly, I will discuss response of materials to mechanical stresses and high-velocity impact and our recent discovery of new mechanisms of ductility in nominally brittle materials. We found that in the absence of dislocation plasticity, stress-induced amorphous shear bands can increase ductility and toughness. We identified criteria for when such shear bands enable plasticity instead of being pre-cursors to fracture. These mechanisms open the possibility for design of materials that are both strong and ductile.

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