Skip Navigation
Search

 

Prof. Trelewicz presents a talk at the Fall MRS Meeting .
November 2018
Jason's presentation "Interfacial Plasticity and Strain Delocalization in Metallic Nanoglasses" highlighted our simulation work on understanding the mechanisms of strain delocalization in nanoglasses produced through hydrostatic compression of amorphous nanoparticles. 

Jonathan presents a poster at the Fall MRS Meeting .  
November 2018
Jonathan's poster "Shear Band Nucleation and Propagation in Metallic Glass Matrix Composites" described our research using nanoindentation to probe the onset of shear banding and propensity for shear localization in metallic glass matrix composites. 

Prof. Trelewicz presents a talk at the 2018 NuMat Conference .
October 2018
Jason presentation "Controlling Stability and Radiation Tolerance in Nanocrystalline Tungsten through Grain Boundary Doping" summarized our efforts to date on the design of solute-stabilized tungsten alloys fusion energy application and included a variety of simulations and in situ irradiation experiments. 

Streit presents a poster at the 2018 NuMat Conference .
October 2018
Streit's poster "The Role of Grain Boundary Defects in the Mechanical Behavior of Helium Implanted Nanocrystalline Tungsten" described our results on the competition between softening due to grain boundary void/cavity formation and hardening from intragranular defect loop damage in tungsten. 

Princeton University features EMNL's collaboration with Prof. Bruce Koel's research group .
May 2018
Working with Prof. Bruce Koel and Dr. Luxherta Buzi, we are exploring deuterium and helium retention in nanocrystalline tungsten alloys under plasma conditions.  Princeton undergraduate Meagan Yeh conducted the work with Dr. Buzi as part of her senior thesis.  Further information can be found HERE

Princeton University features EMNL's collaboration with Prof. Bruce Koel's research group .
May 2018
Working with Prof. Bruce Koel and Dr. Luxherta Buzi, we are exploring deuterium and helium retention in nanocrystalline tungsten alloys under plasma conditions.  Princeton undergraduate Meagan Yeh conducted the work with Dr. Buzi as part of her senior thesis.  Further information can be found HERE

Princeton University features EMNL's collaboration with Prof. Bruce Koel's research group .
May 2018
Working with Prof. Bruce Koel and Dr. Luxherta Buzi, we are exploring deuterium and helium retention in nanocrystalline tungsten alloys under plasma conditions.  Princeton undergraduate Meagan Yeh conducted the work with Dr. Buzi as part of her senior thesis.  Further information can be found HERE

 

 

Princeton University features EMNL's collaboration with Prof. Bruce Koel's research group .
May 2018
Working with Prof. Bruce Koel and Dr. Luxherta Buzi, we are exploring deuterium and helium retention in nanocrystalline tungsten alloys under plasma conditions.  Princeton undergraduate Meagan Yeh conducted the work with Dr. Buzi as part of her senior thesis.  Further information can be found HERE

Prof. Trelewicz presents invited talk at Pacific Northwest National Laboratory .
May 2018
Jason's presentation “Solute Stabilized Nanocrystalline Metals: Alloy Design and the Role of Grain Boundaries in Damage Accumulation” focused on our work in designing nanostructured tungsten alloys for the fusion energy environment with particular emphasis on grain boundary stability explored through in situ experiments and atomistic simulations.

Prof. Trelewicz presents invited talk at the Materials Research Society Spring Meeting in Phoenix, AZ .
April 2018
Jason’s presentation “Designing Crystalline-Amorphous Nanolaminates Against Strain Localization Using Deformation Maps” discussed our work on modeling and experiments to understand deformation mechanism transitions and their implications for mechanical properties.

Prof. Trelewicz presents invited talk to the Engineering Physics Department at the University of Wisconsin, Madison.
April 2018
Jason’s talk on “Controlling Deformation Behavior in Nanocrystalline Alloys through Grain Boundary Engineering” highlighted our simulations on stress-assisted grain growth and grain boundary segregation strengthening in nanocrystalline alloys, which elucidated the role of grain boundary chemistry in tuning deformation mechanisms.

Bin's paper with Prof. Anatoly Frenkle's Group at Stony Brook University "Investigation of Periodically Driven Systems by X-ray Absorption Spectroscopy using Asynchronous Data Collection Mode" published in Review of Scientific Instruments.
March 2018
Using our nanocrystalline Ni-W alloys as a model material, the team demonstrated a setup for modulation excitation spectroscopy experiments at the Inner Shell Spectroscopy beamline of National Synchrotron Light Source - II.  A computer algorithm and dedicated software were developed for asynchronous data processing and analysis. We demonstrate the reconstruction of X-ray absorption spectra for different time points within the modulation pulse using a model system.

Prof. Trelewicz presents invited talk at Princeton Plasma Physics Laboratory.
March 2018
Jason’s talk on “Combating Instabilities in Nanocrystalline Tungsten through Grain Boundary Doping" described the role of solute additions, particularly titanium and chromium, in stabilizing nanocrystalline tungsten against rapid coarsening through abnormal grain growth and subsequent microstructural evolution.

Prof. Trelewicz presents an invited talk to the Materials Science and Engineering Department at the University of California, Santa Barbara .
February 2018
Jason’s presentation “The Future of Plasma Facing Materials: Solute Stabilized Nanocrystalline Tungsten Alloys” highlighted a range of in situ heating and ion irradiation results as well as nanoindentation experiments aimed to evaluate the potential of these alloys as future plasma facing materials.

Prof. Trelewicz presents  an invited talk to the Materials Science and Engineering Department at the University of Florida .
February 2018
Jason’s talk on “Exploring Nanocrystalline Tungsten for Fusion Energy Platforms” discussed grain boundary instabilities in nanocrystalline tungsten under ion irradiation with insights gained through in situ analysis and displacement cascade simulations.

Streits's paper "Softening due to Grain Boundary Cavity Formation and its Competition with Hardening in Helium Implanted Nanocrystalline Tungsten" published in Scientific Reports.
February 2018
In this study, we explore the impact of defect microstructures on the mechanical behavior of helium ion implanted nanocrystalline tungsten through nanoindentation. Softening was apparent across all implantation temperatures and attributed to bubble/cavity loaded grain boundaries suppressing the activation barrier for the onset of plasticity via grain boundary mediated dislocation nucleation. An increase in fluence placed cavity induced grain boundary softening in competition with hardening from intragranular defect loop damage, thus signaling a new transition in the mechanical behavior of helium implanted nanocrystalline tungsten.

Olivia's paper "Solute Stabilization of Nanocrystalline Tungsten Against Abnormal Grain Growth" published as an Invited Feature Article in the Journal of Materials Research.
January 2018
This paper explores microstructure and phase evolution in magnetron sputtered nanocrystalline tungsten and tungsten alloy thin films through in situ TEM annealing experiments.  We show that abnormal grain growth in the nanocrystalline tungsten films was due to an allotropic phase transformation, and the addition of alloying elements chromium and titanium stabilized the structure against this transition and quelled grain growth at temperatures up to 1000 °C.

Login to Edit