Investigation of pre-existing particles in Al 5083 alloys

Yi, Gaosong; Sun, Binhan; Poplawsky, Jonathan D.; Zhu, Yakun; Free, Michael L.

doi:10.1016/j.jallcom.2017.12.329

Title: Investigation of pre-existing particles in Al 5083 alloys

Journal Article · Thu Dec 28 00:00:00 EST 2017 · Journal of Alloys and Compounds

DOI:https://doi.org/10.1016/j.jallcom.2017.12.329· OSTI ID:1474494

^[1]; Sun, Binhan ^[2]; Poplawsky, Jonathan D. ^[3]; Zhu, Yakun ^[4]; Free, Michael L. ^[1]

Univ. of Utah, Salt Lake City, UT (United States)
McGill Univ., Montreal, QC (Canada)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
The Ohio State Univ., Columbus, OH (United States)

Pre-existing particles formed in Al 5083 alloys (H131 and H116) have been investigated using scanning transmission electron microscopy(STEM), energy-dispersive X-ray spectroscopy(EDS), atom probe tomography (APT), and small angle neutron scattering (SANS). Three types of pre-existing particles, Al₆Mn, Mg₂Si, and α-Al(Mn,Fe)Si, were observed in Al 5083 alloys, and their relative fraction was obtained from EDS results. The average size, number density, and interfacial area of pre-existing particle were calculated using STEM and SANS results. In addition, an extra layer rich in Mg and Si was found on a pre-existing Mg₂Si particle, and an Al₆Mn layer was identified on an α-Al(Mn,Fe)Si particle. Thermodynamic calculations were also applied to investigate the possible pre-existing particles formed in the alloys, which can be used to explain the extra layers formed on Mg₂Si and α-Al(Mn,Fe)Si particles.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1474494

Alternate ID(s):: OSTI ID: 1548855

Journal Information:: Journal of Alloys and Compounds, Vol. 740, Issue C; ISSN 0925-8388

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 46 works

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