Mech-DEFECT: Mechanically-induced Defect Equilibria for Engineered Complexion Transitions
Abstract
The recent discovery that local stresses near a dislocation can be used to stabilize nanoscale phases, which can be termed linear complexions, promises a new avenue for tailoring the mechanical response of structural solids. In this study, we will directly manipulate the defects responsible for plasticity while also enabling defect-aware design and nanoscale phase templating of future advanced engineering alloys. A unique aspect is the intimate coupling of solid mechanics and materials synthesis, naturally engaging two topical areas which are typically distinct. Stress is the primary driving force behind the segregation and structural changes involved in linear complexion transformations, and developing an understanding of these transitions will enable predictions about the outcomes of future processing experiments. On the other hand, real alloys containing different types and populations of linear complexions must be made in order to probe the fundamental mechanics of and barriers to dislocation mechanisms such as stacking fault constriction, dislocation breakaway, and secondary stress field interactions between the complexion and other defects. As a whole, this project will provide advancements in the fields of computational mechanics, in situ experimental mechanics utilizing novel electron microscopy techniques, defect engineering and design, and processing science. The assembled team offers a unique interdisciplinary approach that blends theory, computation, and experiment.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jun 25, 2021
- Source ID
- W911NF2110288
Entities
People
- Timothy Rupert
Organizations
- Army Contracting Command
- United States Army
- University of California, Irvine