Improved heat and corrosion resistance of high electrical conductivity Al-Mg-Si alloys by multi-alloying of Ce, Sc and Y

被引：19
作者：
Wang, Weiyi [1 ,3 ]
Pan, Qinglin [2 ,3 ]
Wang, Xiangdong [4 ]
Liu, Bing [2 ,3 ]
机构：
[1] Shandong Univ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Minist Educ, Jinan 250061, Peoples R China
[2] Cent South Univ, Key Lab Nonferrous Metall Mat Sci & Engn, Minist Educ, Changsha 410083, Peoples R China
[3] Cent South Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China
[4] CRRC Times Elect Co Ltd, Mfg Ctr, Zhuzhou 412001, Peoples R China
来源：
CORROSION SCIENCE | 2024年 / 226卷
关键词：
High electrical conductivity Al -Mg -Si alloy; Rare earth microalloying; Corrosion resistance; Heat resistance; Microstructure evolution; MECHANICAL-PROPERTIES; ALUMINUM-ALLOY; CU ALLOY; MICROSTRUCTURE; BEHAVIOR; PRECIPITATION; EXTRUSION; STRENGTH; PHASE; OPTIMIZATION;
D O I：
10.1016/j.corsci.2023.111695
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In order to improve the corrosion and heat resistance of Al-Mg-Si alloy conductor materials, Ce, Sc, Y and Zr were added in Al-Mg-Si alloy to regulate the microstructure. The Al-Mg-Si-Ce-Sc-Y alloy was designed with excellent pitting and intergranular corrosion resistance by obtaining the micron-sized Fe-containing second phase with a lower potential difference to Al matrix, more dispersed grain boundary precipitates with a higher proportion of Si particles, narrower width of PFZ and ideal distribution of intergranular precipitates. The Al-Mg-Si-Ce-Sc-Y alloy also maintained higher hardness, strength and electrical conductivity after overaging and annealing and the corrosion/heat resistance mechanisms were proposed.
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页数：26
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