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Atom probe tomography study of the nanoscale heterostructure around an Al20Mn3Cu2 dispersoid in aluminum alloy 2024
journal contribution
posted on 2014-01-01, 00:00 authored by Reza Parvizi, Ross MarceauRoss Marceau, A E Hughes, Mike Yongjun TanMike Yongjun Tan, Maria ForsythMaria ForsythAtom probe tomography (APT) has been used to investigate the surface and sub-surface microstructures of aluminum alloy 2024 (AA2024) in the T3 condition (solution heat treated, cold worked, and naturally aged to a substantially stable condition). This study revealed surface Cu enrichment on the alloy matrix, local chemical structure around a dispersoid Al20Mn3Cu2 particle including a Cu-rich particle and S-phase particle on its external surface. Moreover, there was a significant level of hydrogen within the dispersoid, indicating that it is a hydrogen sink. These observations of the nanoscale structure around the dispersoid particle have considerable implications for understanding both corrosion and hydrogen embrittlement in high-strength aluminum alloys.
History
Journal
LangmuirVolume
30Issue
49Pagination
14817 - 14823Publisher
American Chemical SocietyLocation
Washington, D.C.Publisher DOI
ISSN
1520-5827Language
engPublication classification
C Journal article; C1 Refereed article in a scholarly journalCopyright notice
2014, American Chemical SocietyUsage metrics
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