DURIP UNDERSTANDING THE ROLE OF INTRAGRANULAR STRAIN DURING DEFORMATION AND PROCESSING OF HIGH TEMPERATURE STRUCTURAL METALS
Abstract
Continued development of Ni-base superalloys and other high temperature structural materials along with optimization of their manufacturing processes are critical enabling the design and realization of transformational gas turbine engine technology used for aerospace propulsion, space exploration and power generation. As the operating temperatures of advanced gas turbine engines are continually being increased in an effort to improve efficiency and reduce emissions, new materials and processes need to be developed as commercial Ni-base superalloys are being used at the limits of their temperature capability. Recent advances in materials characterization techniques have enabled an improved fundamental understanding of the underlying physics limiting the behavior of Ni-base superalloys. This proposal aims to justify the acquisition of a state of the art, integrated electron back scatter diffraction (EBSD) and energy dispersive spectrometer (EDS) system that will enable the faculty at Illinois Tech engaged in research programs that are relevant to DoD to perform microstructural analyses of strain and chemistry at unprecedented resolution and speed. Rapid, detailed characterization of a broad range of material microstructures will be used to construct and supplement databases that will be used to train and develop novel machine learning algorithms that will be applied to create innovative engineering solutions to overcome their intrinsic material characteristics. The system will support various ongoing and planned projects pertaining to (i) understanding how heterogeneous chemical features and strain distributions contribute to abnormal grain growth in high strength, powder processed Ni-base superalloys; (ii) quantification of how microstructural features impact stress relaxation mechanisms in high refractory content Ni-base superalloys; (iii) the role of inoculants in minimizing anisotropy and promoting the columnar to equiaxed transition during additive manufacturing of Ni-base superalloys; (iv) exploring the use of irregularly shaped Ti powder particles and the development of a low cost route for laser bed powder fusion processing of aerospace components and structures.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Mar 07, 2023
- Source ID
- FA95502110248
Entities
People
- Sammy Tin
Organizations
- Air Force Office of Scientific Research
- Illinois Institute of Technology
- United States Air Force