Microstructure and Crystallization Evolution of Directionally Solidified Al-Cu-Si Alloys With the Assistance of a Static Magnetic Field

被引：7
作者：
Du, Dafan [1 ,2 ]
Dong, Anping [1 ,2 ]
Shu, Da [1 ,2 ]
Zhu, Guoliang [1 ,2 ]
Sun, Baode [1 ,2 ]
Li, Xi [1 ,2 ]
机构：
[1] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Shanghai Key Lab Adv High Temp Mat & Precis Formi, Shanghai 200240, Peoples R China
[2] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China
来源：
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2022年 / 53卷 / 08期
基金：
中国国家自然科学基金; 国家重点研发计划;
关键词：
TERNARY EUTECTIC SYSTEM; HEAT-TREATMENT; GROWTH; AG; CONVECTION; LAMELLAR; TRANSFORMATION; ANISOTROPY;
D O I：
10.1007/s11661-022-06735-w
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We report on the study of the evolution of microstructure and crystallization during directionally solidified Al-Cu-Si alloys with the assistance of a static magnetic field (SMF). Our results investigate how the applied SMF changed a colony eutectic structure to a normal eutectic structure; moreover, the eutectic colony spacing and the interlamellar spacing decrease with increasing SMF intensity. Electron backscatter diffraction (EBSD) results show that the SMF changed the crystal orientation relationships (OR) between alpha-Al and Al2Cu phases from an unusual relationship [Gamma 4: Al(001)//Al2Cu(011)] to a normal one [Beta 6: Al(111)//Al2Cu(211)]. Cu content in the alpha-Al phase decreases with increasing SMF intensity. The evolution of the eutectic microstructure and the OR can be attributed to the thermoelectric magnetic effects which change the solute distribution at both the crucible and eutectic scales.
引用
收藏
页码：3166 / 3178
页数：13
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