Investigation of Fundamental Mechanisms for Multi-Scale Modeling of Complex Concentrated Alloys for Aircraft Structural Applications
Abstract
High entropy alloys (HEAs) have emerged as an exciting new class of structural materials that transform the traditional alloy design from a single principal element paradigm to one consisting of multiple equimolar or near-equimolar elements forming a single-phase solid-solution. HEAs, in contrast to the earlier approaches of adding elements to a ‘parent’ matrix, enable us to createnovel alloys with targeted properties by focusing on the unexplored central region of a multi-component phase diagram. However, the focus on a single-phase microstructure seriously limits performance at elevated temperatures. Therefore, recent efforts have been focused on significantly extending the HEA paradigm to develop multi-phase complex-concentrated alloys (CCAs) for demanding engineering applications involving fatigue, creep, and toughness. These alloys will retain the “high entropy” nature of the parent matrix and add complex ordered precipitate strengtheners, often containing multiple elements on their respective sub-lattices. This will require developing new science and fundamental mechanistic insights to describe the behavior of these complex systems and to integrate this new science with advanced computational and characterization tools to create unprecedented predictive schemes that permit full exploitation of these unexplored systems. The investigation of such fundamental mechanisms in CCAs,related to phase transformations and microstructural evolution, deformation behavior, and oxidation, forms the basis of the proposed study.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Apr 09, 2018
- Source ID
- FA95501710395
Entities
People
- Rajarshi Banerjee
Organizations
- Air Force Office of Scientific Research
- United States Air Force
- University of North Texas