@inproceedings{02427c14214b4ab48e897b1c6555d85d,
title = "Microstructure and Mechanical Properties of a Precipitation-Hardened Al–Mn–Zr–Er Alloy",
abstract = "Commercial aluminum alloys are unusable above ~250 °C (523 K, which is 56% of the absolute melting point of aluminum, Tm = 933 K), due mainly to the rapid coarsening/dissolution of their fine strengthening precipitates. The recently developed L12-strengthened alloys exhibit, however, a significantly better coarsening resistance at high temperatures. In this study, we present a new class of L12-strengthed aluminum alloys based on the Al–Mn–Zr–Er system, which exhibits an exceptional combination of high-creep and high coarsening resistance at 300 °C. The microstructure of the isochronally peak-aged alloys has been studied over relevant length scales utilizing scanning electron microscopy (SEM) and local-electrode atom-probe (LEAP) tomography, in parallel with microhardness measurements. Compressive creep experiments are performed to determine the creep threshold stresses of these alloys at 300 °C.",
keywords = "Aluminum alloys, Coarsening kinetics, Creep resistance, High-temperature alloys, L1 nanoprecipitates, Mechanical properties, Scandium, Solid-solution strengthening, Zirconium",
author = "Farkoosh, {Amir R.} and Seidman, {David N.} and Dunand, {David C.}",
note = "Funding Information: This research was supported by the Office of Naval Research (N00014-18-1-2550). Atom-probe tomography was performed at the Northwestern University Center for Atom-Probe Tomography (NUCAPT). The LEAP tomograph at NUCAPT was purchased and upgraded with grants from the NSF-MRI (DMR-0420532) and ONR-DURIP (N00014-0400798, N00014-0610539, N00014-0910781, N00014-1712870) programs. NUCAPT received support from the MRSEC program (NSF DMR-1720139) at the Materials Research Center, the SHyNE Resource (NSF ECCS-1542205), and the Initiative for Sustainability and Energy (ISEN) at Northwestern University. This work made use of the Materials Characterization and Imaging Facility which receives support from the MRSEC Program (NSF DMR-1720139) of the Materials Research Center at Northwestern University. This work made use of the EPIC facility of Northwestern University{\textquoteright}s NUANCE Center, which has received support from the MRSEC program NSF DMR-1720139) at the Materials Research Center; the International Institute for Nanotechnology (IIN); and the State of Illinois, through the IIN. Research professor Dieter Isheim is thanked for managing NUCAPT. Funding Information: Acknowledgements This research was supported by the Office of Naval Research (N00014-18-1-2550). Atom-probe tomography was performed at the Northwestern University Center for Atom-Probe Tomography (NUCAPT). The LEAP tomograph at NUCAPT was purchased and upgraded with grants from the NSF-MRI (DMR-0420532) and ONR-DURIP (N00014-0400798, N00014-0610539, N00014-0910781, N00014-1712870) programs. NUCAPT received support from the MRSEC program (NSF DMR-1720139) at the Materials Research Center, the SHyNE Resource (NSF ECCS-1542205), and the Initiative for Sustainability and Energy (ISEN) at Northwestern University. This work made use of the Materials Characterization and Imaging Facility which receives support from the MRSEC Program (NSF DMR-1720139) of the Materials Research Center at Northwestern University. This work made use of the EPIC facility of Northwestern University{\textquoteright}s NUANCE Center, which has received support from the MRSEC program NSF DMR-1720139) at the Materials Research Center; the International Institute for Nanotechnology (IIN); and the State of Illinois, through the IIN. Research professor Dieter Isheim is thanked for managing NUCAPT. Publisher Copyright: {\textcopyright} 2021, The Minerals, Metals & Materials Society.; Light Metals Symposium held at the TMS Annual Meeting and Exhibition, 2021 ; Conference date: 15-03-2021 Through 18-03-2021",
year = "2021",
doi = "10.1007/978-3-030-65396-5_35",
language = "English (US)",
isbn = "9783030653958",
series = "Minerals, Metals and Materials Series",
publisher = "Springer Science and Business Media Deutschland GmbH",
pages = "239--244",
editor = "Linus Perander",
booktitle = "Light Metals 2021 - 50th Anniversary Edition",
address = "Germany",
}