The MSE department is participating in the North American Materials Colloquium Series. For more information on NAMCS seminars please visit namcs.org. The NAMCS seminars begin this week. UCF MSE department is encouraging attendance on FRIDAY, SEPTEMBER 11 at 4 pm. Friday’s seminar is titled “Imagining of Chemical Short-range Order and Its Impact on Deformation in Structural Alloys,” and will be presented by Ruopeng Zhang a Ph.D. Candidate at the University of California, Berkley.
The following abstract was provided:
Chemical short-range order (SRO) of atoms within a nominally single-phase solid solution is known to significantly impact the plastic deformation of alloys. While associated phenomena, such as planar dislocation slip morphology and ranging stacking fault energies, have been indirectly related to deformation behaviors, direct observation of the SRO microstructure at the nanoscale remains unexplored. Here we report the direct observations of SRO and associated deformation features in a Ti-Al alloy and a medium entropy alloy using energy-filtered dark-field imaging. The observation revealed the domain clusters’ structure of the SRO and verified that the degree of SRO could be tailored by the thermomechanical history of the alloys. The impact of SRO on the deformation behaviors of the alloys, including dislocation motions and deformation twinning, are investigated at different scales. The atomistic interaction between SRO and deformation is probed via a full strain tensor mapping method based on four-dimensional scanning transmission electron microscopy, revealing the evolution of the local bonding environment that is responsible for the slip planarity. The toolset developed in the current study grants the ability to conduct a quantitative analysis of SRO and shines light upon a new avenue to engineer desirable performance of structural alloys.
You must have a Zoom account and be logged in to view the live webinar. If attendance is required by your university, please make sure you are logged into Zoom with an email address affiliated with your university (students please use your knights.ucf.edu email). Your attendance and participation are encouraged.
Information on the rest of the series, including flyers for advertising each talk, are available on the series homepage: namcs.org
We hope you enjoy the series this fall. Your feedback is welcome.
The Pennsylvania State University
Case Western Reserve University
The University of Tennessee, Knoxville
University of Central Florida
Colorado School of Mines