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
收藏
页码：1498 / 1507
页数：10
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