First-Principles Insights into Complex Interplays Among Nano-Phases in an Al-Cu-Li-Zr Alloy
SSRN, ISSN: 1556-5068
2022
- 5Citations
- 233Usage
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Example: if you select the 1-year option for an article published in 2019 and a metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019. If you select the 3-year option for the same article published in 2019 and the metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019, 2018 and 2017.
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Article Description
Multiple nano-phases and nano-complexes feature the typical microstructures of current commercial Al-Li alloys. We present a combined first-principles and scanning transmission electron microscopy study of various nano-features in an aged Al-Cu-Li-Zr alloy. Many fundamental aspects of their formation and interaction have been elucidated from first-principles energetics. Highly-diffusive excess Li can segregate to the early-precipitated β’(L1 -AlZr) nano-phase to develop a tentative δ’(L1 -AlLi) shell at the early-aging stage. The δ’ shell can promote GP-zone precipitation along the (100) facets but is metastable only, and will eventually dissolve into β’ with time. Consequently, GP-zones can evolve into θ'' and θ’ independently during the prolonged aging. Excess Li weakly segregates to θ’ interfaces to develop an 'in-phase' or 'anti-phase' δ’ shell. The gained insights help clarify various experimental observations, and their implications on Al-Li alloy design are also discussed.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85179533901&origin=inward; http://dx.doi.org/10.2139/ssrn.4104201; https://www.ssrn.com/abstract=4104201; https://dx.doi.org/10.2139/ssrn.4104201; https://papers.ssrn.com/sol3/papers.cfm?abstract_id=4104201; https://ssrn.com/abstract=4104201
Elsevier BV
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