添加Sn改性Al-1.0Mg-0.6Si（-0.3Cu）合金的析出和腐蚀行为研究

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Journal of Alloys and Compounds Pub Date : 2025-03-31 DOI:10.1016/j.jallcom.2025.180120

Wenbin Tu , Jianguo Tang , Fengkai Lu , Lehang Ma , Shanlin Wang , Yuhua Chen , Xin Zhan , Pian Xu

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引用次数: 0

摘要

采用硬度、电化学测量、晶间腐蚀（IGC）、扫描电镜（SEM）和透射电镜（TEM）研究了添加Sn和Cu对Al-1.0Mg-0.6Si合金析出和腐蚀行为的影响。结果表明：Sn的加入提高了Al-1.0Mg-0.6Si （-Cu）合金的峰时效硬度，这与Sn加速析出有关；Al-1.0Mg-Si合金的IGC虽然不会因Sn的加入而产生，但会减轻其点蚀程度。单独添加Cu会增加IGC的敏感性。同时加入Sn和Cu可进一步提高Al-1.0Mg-0.6Si合金的IGC敏感性，这与晶界组织演化有关。无析出区宽度的增大和晶界处连续Q相的分布加速了微电池晶间腐蚀的敏感性。

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Study on precipitation and corrosion behavior of Al-1.0Mg-0.6Si(-0.3Cu) alloys by Sn addition modification

The effect of Sn and Cu addition on precipitation and corrosion behavior of Al-1.0Mg-0.6Si alloy are investigated using the hardness, electrochemical measurements, intergranular corrosion (IGC), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The results indicated that the peak-aged hardness of Al-1.0Mg-0.6Si (-Cu) alloy were enhanced by the addition of Sn, which is related to the acceleration of precipitation. Although the IGC of Al-1.0Mg-Si alloy is not generated by the addition of Sn, the degree of pitting corrosion will be alleviated. The additions of Cu alone increase the susceptibility of IGC. The susceptibility of IGC of Al-1.0Mg-0.6Si alloy can further be increased by joint addition of Sn and Cu, which is related to microstructure evolution of grain boundary. The increase in the width of precipitation free zone (PFZ) and distribution of continuous Q phase at grain boundary to from micro-battery accelerates the susceptibility of intergranular corrosion.

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来源期刊

Journal of Alloys and Compounds 工程技术-材料科学：综合

CiteScore

11.10

自引率

14.50%

发文量

5146

审稿时长

67 days

期刊介绍： The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.