期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 818, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2019.152922
关键词
Hardening behavior; Precipitation strengthening; Thermal stability; Secondary Al3Sc particles; Sc-containing aluminum alloy
资金
- Science and technology Major Project of Hunan Province [2017GK4002]
- Fundamental Research Funds for the Central Universities of Central South University [2019zzts852]
The hardening behavior of Al-0.25Sc and Al-0.25-0.12 (wt.%) alloys during isothermal annealing were studied by transmission electron microscopy (TEM), scanning electron microscopy (SEM), optical microscopy (OM), and hardness measurements. The results show that Sc-containing aluminum alloy contained fine dispersion of spherical secondary Al3Sc particles, which developed during the annealing process. Al-3(Sc, Zr) precipitates in the Al-0.25Sc-0.12Zr alloys are core-shell structure. Different isothermal annealing temperatures can lead to different strengthening effects on the alloys. Al-0.25Sc and Al-0.25Sc-0.12Zr alloys both exhibit obvious annealing hardening behavior, and the ternary Al-0.25Sc-0.12Zr alloy shows better thermal stability than Al-0.25Sc alloy. (C) 2019 Elsevier B.V. All rights reserved.
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