Enhancing ambient and elevated temperature performance of hypoeutectic Al-Ce cast alloys by Al3(Sc,Zr) precipitate
Enhancing ambient and elevated temperature performance of hypoeutectic Al-Ce cast alloys by Al3(Sc,Zr) precipitate
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通过 Al3(Sc,Zr) 沉淀增强亚共晶 Al-Ce 铸造合金的环境和高温性能
DOI：
10.1016/j.jmrt.2023.12.021
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Mohammed A
中科院分区：
文献类型：
--
作者：
Mohammed A
本研究探讨了将Sc和Zr引入亚共晶Al-9 Ce铸造合金的后果，特别是研究它们对显微组织和力学性能的影响。研究结果表明，在Al-9 Ce合金的晶粒尺寸的显着减少，同时成功地保持了独特的形状的共晶Al 11 Ce 3相通过纳入Sc和Zr添加剂。在时效过程中，在α-Al与Al 11 Ce 3相的界面处和α-Al基体中均形成Al 3（Sc，Zr）共格析出相。值得注意的是，这导致在350 °C下在3小时的短时间内实现最佳硬度。峰值时效的四元Al-9 Ce-xSc-yZr合金在室温和高温下的拉伸强度均显著优于二元Al-Ce合金。总的来说，该研究强调了Al-Ce-Sc-Zr合金在高温应用中的前景，因为它们表现出更高的机械性能。
This study explored the consequences of incorporating Sc and Zr into hypoeutectic Al–9Ce cast alloys, specifically investigating their influence on microstructure and mechanical properties. The findings demonstrated the significant reduction in the grain size of the Al–9Ce alloy while successfully maintaining the distinctive shape of the eutectic Al11Ce3phase through the incorporation of Sc and Zr additions. During aging treatments, Al3(Sc,Zr) coherent precipitates formed both at the interface between the α-Al and Al11Ce3phases and within the α-Al matrix. Remarkably, this led to optimal hardness achieved within a short duration of 3 h at 350 °C. Peak-aged quaternary Al–9Ce–xSc–yZr alloys showed significantly better tensile strength than the binary Al–Ce alloy at both ambient and elevated temperatures. Overall, the study underscored promising prospects of Al–Ce–Sc–Zr alloys for use in high-temperature applications, as they exhibited enhanced mechanical properties.