Elasto-Plastic Stochasticity: The Role of Atomic Level Fluctuations on Mesoscale Deformation Properties in Complex Alloys

Speaker

Jaime Marian

Departments of Materials Science and Engineering and Mechanical and Aerospace, University of California, Los Angeles

About This Talk

Materials deformation is ultimately controlled by physical processes at the atomic scale. In many cases, these processes are controlled by fluctuations characterized by highly stochastic behavior. While we have learned to subsume this stochasticity into continuum laws that describe average behavior, as science and technology pushes down the boundaries of what is observable in terms of time and length scales, the mean-field approach starts to become questionable. Specifically, important phenomena in metals deformation such as creep, dynamic strain aging, solute hardening, and deformation processes in chemically complex alloys cannot be properly studied without capturing atomic-level fluctuations and their effect on meso- and macroscopic behavior. In this presentation, Professor Marian will discuss the development of models that explicitly consider thermal and compositional fluctuations and how their results can be extended into larger length and longer time scales. Results for refractory transition metals, ferritic materials, and high-entropy alloys will be presented.

Biography

Professor Jaime Marian has a joint appointment in the Materials Science and Engineering and Mechanical and Aerospace Departments at UCLA since 2014. Before that, he was a staff scientist at Lawrence Livermore National Laboratory, where he worked on the development of physics models for materials under extreme conditions. He holds a nuclear engineering degree from the Polytechnic University of Madrid, and a PhD in computational materials and mechanics. He did postdoctoral work at Caltech and was visiting professor at the IMDEA Materials Institute in Madrid.

About the MSE Seminar Series

The Materials Science and Engineering (MSE) Seminar Series features distinguished speakers from leading institutions, offering a platform for sharing groundbreaking research, innovative ideas, and entrepreneurial experiences. Held multiple times each semester, these seminars bring global perspectives world to MIT’s materials research community, exposing students, faculty, and postdocs to cutting-edge concepts and valuable networking opportunities.