High-temperature mechanical behaviour of Al-10Ce alloy with Sc, Zr, Si, and Mg alloying elements

被引：4
作者：
Keerti, Shishir [1 ]
Shurkin, Pavel [1 ]
Cai, Qing [1 ]
Nadendla, Hari Babu [1 ]
Mandal, Animesh [2 ]
机构：
[1] Brunel Univ London, BCAST, Kingston Lane, Uxbridge UB8 3PH, Middx, England
[2] Indian Inst Technol Bhubaneswar, Sch Minerals Met & Mat Engn, Kansapada 752050, Orissa, India
来源：
MATERIALS & DESIGN | 2024年 / 248卷
关键词：
Al-Ce alloys; Elevated temperature mechanical properties; Thermal stability; High pressure die casting; AGE-HARDENING BEHAVIOR; ELEVATED-TEMPERATURE; MICROSTRUCTURE; ALUMINUM; STRENGTH; ROOM;
D O I：
10.1016/j.matdes.2024.113524
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The influence of Sc, Zr, Mg, and Si addition to Al-10Ce hypereutectic alloy on the formation of intermetallics and mechanical properties have been investigated in as-cast condition and after heat treatment. The incorporation of Sc and Zr facilitated the formation of primary Al3 (Sc, Zr) intermetallics, which effectively refined the alpha-Al grains due to heterogeneous nucleation. Si addition resulted in the formation of the Al2CeSi2 phase. Aging at 300 degrees C led to the formation of nanoscale Al3(Sc, Zr) precipitates with an average diameter of 3 nm. The hardness of the alloy significantly increased and remained unaffected even after ageing for 100 h which suggests the thermal stability of the Al-Ce alloy containing these precipitates. As a result of thermal stability, Al-10Ce-(Sc, Zr) is observed to exhibit higher yield strength at 300 degrees C than a range of Al-Cu, Al-Si alloy systems.
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页数：12
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