Effect of Cu addition on microstructure and corrosion behavior of Al-15Mg2Si composite

被引：5

作者：

Hesami, Leila ^{[2
]}

Taghiabadi, Reza ^{[2
]}

Ghoncheh, Mohammad Hossein ^{[3
]}

Emami, Mohammad ^{[1
]}

Yazdi, Morteza Saghafi ^{[2
]}

机构：

[1] Univ Bonab, Bonab, Iran

[2] Imam Khomeini Int Univ, Qazvin, Iran

[3] Univ New Brunswick, Fredericton, NB, Canada

来源：

MATERIALS TESTING | 2023年 / 65卷 / 10期

关键词：

Al-15Mg(2)Si composite; copper; corrosion resistance; mechanical behavior; thermal analysis; MECHANICAL-PROPERTIES; ALLOY; PARTICLES; MG2SI; PHASE; EVOLUTION; EIS;

D O I：

10.1515/mt-2023-0217

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The Cu effect on the microstructure and corrosion resistance of Al-15Mg(2)Si composites was studied. The results showed that Cu addition decreased the average size of primary Mg2Si (Mg2SiP) particles, changed the hopper-like Mg2SiP particles to polyhedrals, and caused the formation of ?-Al2Cu and Q-Al5Mg8Si6Cu2 compounds in the composite matrix. According to the image analysis results, increasing the Cu content from 0.01 to 5 wt% halved the average size of Mg2SiP particles, increased their fraction by about 40 %, and increased the composite porosity content. The electrochemical impedance spectroscopy showed that adding 5 wt% of Cu resulted in an increase of about 3.7 times in the corrosion resistance as compared to Al-15Mg(2)Si composite. The beneficial effects of Cu were also confirmed by the potentiodynamic polarization experiments. Cu addition seems to promote less intense general corrosion than the base alloy's localized attack.

引用

页码：1498 / 1507

页数：10

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