Low density corrosion resistant multi-principal element alloys
Abstract
Multi-principal element alloys (MPEAs) represent a unique class of alloys, usually comprised of nominally five or more elements in n,ear equi-atomic proportions. MPEAs have gained significant interest on the basis that such alloy systems are reported to result in u,nique microstructures, with unique properties (including high strength and thermal stability). Critically, MPEAs have in many instan,ces also demonstrated a high resistance to corrosion ? which may permit the broader use of MPEAs as corrosion resistant alloys (CRAs,) in harsh environments. However, in MPEA research to date, both challenges and prospect remain. The passivity of MPEAs, and specif,ically lightweight MPEAs, remains a research gap. This project will also explore the fundamentals of passivity in a new light (in me,eting the practical objective) using advanced methods such as atomic spectro-electrochemistry (ASEC), allowing a contemporary model, of alloy passivity and surface structure - incorporating robust physico-chemical models into alloy performance. Specifically, this, will define, the development of ?dynamic passivity? in reactive alloys. This will allow the development of one or more families of, corrosion resistant MPEAs that have a (significantly) lower density than iron.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Dec 06, 2022
- Source ID
- N000142312033
Entities
People
- Nick Birbilis
Organizations
- Australian National University
- Office of Naval Research
- United States Navy