Microstructure evolution and tensile behavior of balanced Al-Mg-Si alloy with various homogenization parameters

被引：0
|
作者：
JIN, Dong [1 ]
LI, Hong-ying [1 ]
ZHU, Zhi-xiang [2 ]
YANG, Chang-long [3 ]
MIAO, Yao-jun [4 ]
XU, Chao [3 ]
CHEN, Bao-an [2 ]
LIU, Zhen [5 ]
机构：
[1] School of Materials Science and Engineering, Central South University, Changsha,410083, China
[2] State Key Laboratory of Advanced Power Transmission Technology, State Grid Smart Grid Research Institute Co., Ltd., Beijing,102209, China
[3] State Grid Liaoning Electric Power Supply Co., Ltd., Shenyang,110042, China
[4] Jiangsu Zhongtian Technology Co., Ltd., Nantong,226010, China
[5] China Electric Power Research Institute Co., Ltd., Beijing,100192, China
来源：
Transactions of Nonferrous Metals Society of China (English Edition) | 2024年 / 34卷 / 11期
关键词：
Coarsening - Homogenization method - Iron alloys - Magnesium compounds - Tensile testing;
D O I：
10.1016/S1003-6326(24)66624-0
中图分类号：
学科分类号：
摘要：
The effects of homogenization parameters on the microstructure evolution and tensile behavior of a balanced Al-Mg-Si alloy were investigated using the optical microscope, scanning electron microscope, X-ray diffraction, electron probe microanalyzer, differential scanning calorimetry, electrical conductivity test, and tensile test. The results show that Mg2Si and β-AlFeSi are the main intermetallic compounds in the as-cast structure, and Mg solute microsegregation is predominant inside the dendrite cell. The prediction of the full dissolution time of Mg2Si by a kinetic model is consistent with the experiment. The β-AlFeSi in the alloy exhibits high thermal stability and mainly undergoes dissolution and coarsening during homogenization at 560 °C, and only a small portion is converted to α-AlFeSi. The optimal homogenization parameters are determined as 560 °C and 360 min, when considering the evolution of microstructure and resource savings. Both the strength and ductility of the alloy increased after homogenization. © 2024 The Nonferrous Metals Society of China
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页码：3536 / 3553
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