Combined electron beam imaging and ab initio modeling of T1 precipitates in Al-Li-Cu alloys

C. Dwyer, M. Weyland, L. Y. Chang, B. C. Muddle

Research output: Contribution to journalArticlepeer-review

78 Scopus citations

Abstract

Among the many considerable challenges faced in developing a rational basis for advanced alloy design, establishing accurate atomistic models is one of the most fundamental. Here we demonstrate how advanced imaging techniques in a double-aberration-corrected transmission electron microscope, combined with ab initio modeling, have been used to determine the atomic structure of embedded 1 nm thick T1 precipitates in precipitation-hardened Al-Li-Cu aerospace alloys. The results provide an accurate determination of the controversial T1 structure, and demonstrate how next-generation techniques permit the characterization of embedded nanostructures in alloys and other nanostructured materials.

Original languageEnglish (US)
Article number201909
JournalApplied Physics Letters
Volume98
Issue number20
DOIs
StatePublished - May 16 2011
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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