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

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, Al 6Mn, Mg 2Si, 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 Mg 2Si particle, and an Al 6Mn 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 Mg 2Si and α-Al(Mn,Fe)Si particles.
Authors:
ORCiD logo [1] ;  [2] ;  [3] ;  [4] ;  [1]
  1. Univ. of Utah, Salt Lake City, UT (United States)
  2. McGill Univ., Montreal, QC (Canada)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  4. The Ohio State Univ., Columbus, OH (United States)
Publication Date:
Grant/Contract Number:
AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
Journal of Alloys and Compounds
Additional Journal Information:
Journal Volume: 740; Journal Issue: C; Journal ID: ISSN 0925-8388
Publisher:
Elsevier
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE
OSTI Identifier:
1474494

Yi, Gaosong, Sun, Binhan, Poplawsky, Jonathan D., Zhu, Yakun, and Free, Michael L.. Investigation of pre-existing particles in Al 5083 alloys. United States: N. p., Web. doi:10.1016/j.jallcom.2017.12.329.
Yi, Gaosong, Sun, Binhan, Poplawsky, Jonathan D., Zhu, Yakun, & Free, Michael L.. Investigation of pre-existing particles in Al 5083 alloys. United States. doi:10.1016/j.jallcom.2017.12.329.
Yi, Gaosong, Sun, Binhan, Poplawsky, Jonathan D., Zhu, Yakun, and Free, Michael L.. 2017. "Investigation of pre-existing particles in Al 5083 alloys". United States. doi:10.1016/j.jallcom.2017.12.329. https://www.osti.gov/servlets/purl/1474494.
@article{osti_1474494,
title = {Investigation of pre-existing particles in Al 5083 alloys},
author = {Yi, Gaosong and Sun, Binhan and Poplawsky, Jonathan D. and Zhu, Yakun and Free, Michael L.},
abstractNote = {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.},
doi = {10.1016/j.jallcom.2017.12.329},
journal = {Journal of Alloys and Compounds},
number = C,
volume = 740,
place = {United States},
year = {2017},
month = {12}
}