Effects of Sc–Er Rare Earth on Solidification Microstructure and Mechanical Properties of A360 Alloy

IF 2.6 3区材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING

International Journal of Metalcasting Pub Date : 2024-07-08 DOI:10.1007/s40962-024-01397-3

Shuaijie Yuan, Jianfei Peng, Wanlin Wang, Yan Zhan, Jie Zeng, Peiyuan Gan, Junyu Ji

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Abstract

Hypoeutectic Al-Si alloy (A360) is widely used to high-pressure die casting components used in the aerospace, automobile and building industries. An experimental investigation has been conducted concerning the effect of different rare earth Sc and Er additions on the solidification process of A360 alloy. The results indicate that a precipitation phase Al(Sc, Er)₂Si₂ is formed with the addition of Sc and Er elements. Moreover, the eutectic Si phase evolves from a coarse block-like and irregular polygonal into a granular morphology, and its average size value is decreased from 25.48 μm to 9.46 μm when the content of Sc–Er increases from 0 wt% to 0.6 wt%. In addition, the alloy exhibits an outstanding combination of mechanical and wear resistance properties at a Sc–Er addition of 0.6 wt%. Compared with the unmodified alloy, its ultimate tensile strength has increased from 82.7 MPa to 148.4 MPa and average friction coefficient has decreased from 0.689 to 0.504.

Graphical Abstract

Abstract Image

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稀土钪对 A360 合金凝固微观结构和机械性能的影响

低共晶铝硅合金（A360）被广泛用于航空航天、汽车和建筑行业的高压压铸部件。实验研究了不同稀土 Sc 和 Er 添加量对 A360 合金凝固过程的影响。结果表明，添加 Sc 和 Er 元素后会形成沉淀相 Al(Sc,Er)2Si2。此外，当 Sc-Er 的含量从 0 wt% 增加到 0.6 wt% 时，共晶 Si 相从粗糙的块状和不规则的多边形演变成粒状形态，其平均粒度值从 25.48 μm 减小到 9.46 μm。此外，Sc-Er 的添加量为 0.6 wt%时，合金的机械性能和耐磨性能表现出了出色的结合。与未改性合金相比，其极限抗拉强度从 82.7 兆帕增加到 148.4 兆帕，平均摩擦系数从 0.689 降至 0.504。

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来源期刊

International Journal of Metalcasting 工程技术-冶金工程

CiteScore

4.20

自引率

42.30%

发文量

174

审稿时长

>12 weeks

期刊介绍： The International Journal of Metalcasting is dedicated to leading the transfer of research and technology for the global metalcasting industry. The quarterly publication keeps the latest developments in metalcasting research and technology in front of the scientific leaders in our global industry throughout the year. All papers published in the the journal are approved after a rigorous peer review process. The editorial peer review board represents three international metalcasting groups: academia (metalcasting professors), science and research (personnel from national labs, research and scientific institutions), and industry (leading technical personnel from metalcasting facilities).