TY - GEN
T1 - Effects of Mn and Mo Micro-additions on Al–Zr–Sc–Er–Si Mechanical Properties
AU - Shu, Shipeng
AU - De Luca, Anthony
AU - Seidman, David N.
AU - Dunand, David C.
N1 - Funding Information:
Acknowledgements This research was sponsored by the Ford-Northwestern University Alliance. Atom-probe tomography was performed at the Northwestern University Center for Atom-Probe Tomography (NUCAPT). The LEAP tomograph in NUCAPT was purchased and upgraded with funding from NSF-MRI (DMR-0420532) and ONR DURIP (N00014e0400798, N00014e0610539, N00014-0910781, N00014-1712870) programs. Instrumentation at NUCAPT was partially supported by the Initiative for Sustainability and Energy at Northwestern University (ISEN). This work made use of the MatCI Facility and the EPIC facility (NUANCE Center) at Northwestern University. NUCAPT, MatCI and NUANCE received support from the MRSEC program (NSF DMR-1720139) through Northwestern’s Materials Research Center; NUCAPT and NUANCE also benefitted from the Soft and Hybrid Nanotechnology Experimental (SHyNE) Resource (NSF NNCI-1542205). NUANCE received support from the International Institute for Nanotechnology (IIN); the Keck Foundation; and the State of Illinois, through the IIN. DNS and DCD disclose financial interests in Braidy Industries, which is active in the area of aluminum alloys.
Funding Information:
This research was sponsored by the Ford-Northwestern University Alliance. Atom-probe tomography was performed at the Northwestern University Center for Atom-Probe Tomography (NUCAPT). The LEAP tomograph in NUCAPT was purchased and upgraded with funding from NSF-MRI (DMR-0420532) and ONR DURIP (N00014e0400798, N00014e0610539, N00014-0910781, N00014-1712870) programs. Instrumentation at NUCAPT was partially supported by the Initiative for Sustainability and Energy at Northwestern University (ISEN). This work made use of the MatCI Facility and the EPIC facility (NUANCE Center) at Northwestern University. NUCAPT, MatCI and NUANCE received support from the MRSEC program (NSFDMR-1720139) through Northwestern?s Materials Research Center; NUCAPT and NUANCE also benefitted from the Soft and Hybrid Nanotechnology Experimental (SHyNE) Resource (NSFNNCI-1542205). NUANCE received support from the International Institute for Nanotechnology (IIN); the Keck Foundation; and the State of Illinois, through the IIN. DNS and DCD disclose financial interests in Braidy Industries, which is active in the area of aluminum alloys.
Publisher Copyright:
© 2020, The Minerals, Metals & Materials Society.
PY - 2020
Y1 - 2020
N2 - Dilute Al–Zr–Sc–Er–Si alloys strengthened by coherent L12 Al3(Sc, Er, Zr) nanoprecipitates have potential applications at temperatures higher than 400 °C. In this research, the effects of micro-additions of 0.25 at.% Mn and/or 0.10 at.% Mo to a dilute Al-0.08Zr-0.014Sc-0.008Er-0.09Si (at.%) alloy were investigated using atom-probe tomography, as well as mechanical testing after different heat treatments. Molybdenum and manganese result in solid-solution strengthening. Aging at 400 °C leads to the formation of core-shell (L12 structure) nanoprecipitates, with Mn partitioning to the core, and Mo partitioning to both the core and nanoprecipitate/matrix interface. Manganese-modified L12 nanoprecipitates exhibit a higher number density, while Molybdenum-modified L12 nanoprecipitates display an improved coarsening resistance.
AB - Dilute Al–Zr–Sc–Er–Si alloys strengthened by coherent L12 Al3(Sc, Er, Zr) nanoprecipitates have potential applications at temperatures higher than 400 °C. In this research, the effects of micro-additions of 0.25 at.% Mn and/or 0.10 at.% Mo to a dilute Al-0.08Zr-0.014Sc-0.008Er-0.09Si (at.%) alloy were investigated using atom-probe tomography, as well as mechanical testing after different heat treatments. Molybdenum and manganese result in solid-solution strengthening. Aging at 400 °C leads to the formation of core-shell (L12 structure) nanoprecipitates, with Mn partitioning to the core, and Mo partitioning to both the core and nanoprecipitate/matrix interface. Manganese-modified L12 nanoprecipitates exhibit a higher number density, while Molybdenum-modified L12 nanoprecipitates display an improved coarsening resistance.
KW - Aluminum alloys
KW - Atom-probe tomography
KW - Precipitation strengthening
UR - http://www.scopus.com/inward/record.url?scp=85079632046&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85079632046&partnerID=8YFLogxK
U2 - 10.1007/978-3-030-36408-3_45
DO - 10.1007/978-3-030-36408-3_45
M3 - Conference contribution
AN - SCOPUS:85079632046
SN - 9783030364076
T3 - Minerals, Metals and Materials Series
SP - 312
EP - 317
BT - Light Metals 2020
A2 - Tomsett, Alan
PB - Springer Science and Business Media Deutschland GmbH
T2 - Light Metals Symposium held at the 149th Annual Meeting and Exhibition, TMS 2020
Y2 - 23 February 2020 through 27 February 2020
ER -