Journal
SCRIPTA MATERIALIA
Volume 65, Issue 7, Pages 592-595Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2011.06.033
Keywords
Aluminum alloy; Precipitation; Erbium; Zirconium
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The precipitation hardening of dilute Al-Er, Al-Zr and Al-Er-Zr alloys was investigated by microhardness measurements and transmission electron microscopy. The Al-0.04Er (at.%) alloy obtains its maximum aging hardness of 400 MPa due to the precipitation of Al(3)Er. The Al-0.04Er-0.08Zr obtains a maximum hardness of 560 MPa, which is significant greater than that of the Al-Er and Al-Zr alloys. The synergetic effect of Er and Zr on the precipitation hardening of Al-Er-Zr alloys is discussed. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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