Restricted Research - Award List, Note/Discussion Page
Fiscal Year: 2023
61 University of North Texas (141949)
Principal Investigator: Vasudevan,Vijay Krishnaswami
Total Amount of Contract, Award, or Gift (Annual before 2011): $ 1,191,785
Exceeds $250,000 (Is it flagged?): Yes
Start and End Dates: 10/1/22 - 9/30/23
Restricted Research: YES
Academic Discipline: Materials Science & Engineer
Department, Center, School, or Institute: College of Engineering
Title of Contract, Award, or Gift: Solid-State Additive Manufacturing of Durable Aluminum-Cerium Alloys for High Temperature Aerospace Structural Applications
Name of Granting or Contracting Agency/Entity:
U.S. Department of Energy
CFDA Link: DOE
81.086
Program Title:
none
CFDA Linked: Conservation Research and Development
Note:
This three-year team project involves a University (UNT) and industry (ECK) partner, together with national lab (ORNL) and industry (Rolls-Royce) advisors whose aim is to apply the novel solid-state Additive Friction Stir Deposition (AFSD) technology, taking advantage of the fine control over temperature, strain and high strain rate shear deformation that this technique allows, combined with alloy design, to manufacture prototype Al-Ce-Mg-X alloy parts that can meet the high temperature mechanical property requirements for high temperature aerospace structural applications. The project employs an integrated computation materials engineering (ICME) coupled with critical experiments approach in five key tasks to produce designed Al-Ce-Mg-X alloy builds that can meet the targeted high temperature properties: 1) alloy design and modeling for composition selection to obtain solid solution, intermetallic composite and precipitate strengthening; 2) processing using a design of experiments approach with solid vs compacted powder feed rod and the main AFS process variables of tool rotation rate and traverse speed to create robust builds of the designed Al-Ce-Mg-X alloys with optimized microstructure, residual stress and mechanical properties; 3) the microstructure of the fabricated materials will be characterized in detail using several powerful analytical electron microscopy and other technique; 4) mechanical properties including yield tensile strength, ductility, creep strength, fatigue life, fracture toughness over a range of temperatures and stress corrosion cracking resistance of the fabricated materials will be evaluated; and 5) establish quantitative composition-processing-structure-property relationships by rigorous analysis of metadata and modeling. The proposed project directly addresses the FOA area relating to the development of Al-Ce and processing to enable increased energy efficiency in aerospace applications. AFSD shows great promise to provide the solution but has been applied only in a limited way to fabricate this class of materials with demanding property requirements. The results and successful development of this disruptive technology will demonstrate an ICME-guided high-performance Al-Ce-Mg-X alloy and process technology that can meet the high temperature property targets for aerospace structural applications.
Discussion: No discussion notes