首页|A new Al5Cu6(Li,Mg)2 cubic phase in an Al-Cu-Li-Mg-X alloy
A new Al5Cu6(Li,Mg)2 cubic phase in an Al-Cu-Li-Mg-X alloy
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NSTL
Elsevier
? 2022 Elsevier Inc.Among cubic metals, the cubic phase has excellent heat-resistance potential owing to its cube-on-cube orientation relationship with the matrix. In this study, a new cubic phase, Al5Cu6(Li,Mg)2, was identified in an Al-Cu-Li-Mg-X alloy after ageing at 165 °C for 15 h. It has a Pm3 structure similar to that of both Al5Cu6Li2 and Al5Cu6Mg2. The density functional theory (DFT) calculations noted that the precipitation of Al5Cu6Li2 is more energetically favorable than that of Al5Cu6Mg2 in the Al-Cu-Li-Mg-X alloy. Moreover, the formation enthalpy may be further reduced when the Mg atoms replace some Li sites in Al5Cu6Li2, in favor of the formation of Al5Cu6(Li,Mg)2.
Al5Cu6(LiMg)2AlloyFormation enthalpyPrecipitation
Jiang B.、Song R.、Li S.、Cao F.、Yi X.
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School of Materials Science and Engineering Changzhou University
School of Materials Science and Engineering Central South University
State Key Laboratory of Nonlinear Mechanics Institute of Mechanics Chinese Academy of Sciences
School of Materials Science and Engineering University of Science and Technology Beijing
NSTL
Elsevier
