Structural and mechanical properties of 7075 alloy strips fabricated by roll-casting in a static magnetic field

作     者：Xin Su Guang-ming Xu Jiu-wen Jiang 

作者机构：Key Laboratory of Ministry of Education for Electromagnetic Processing of MaterialsNortheastern University Foshan Scien Aluminum Co.Ltd. 

出 版 物：《International Journal of Minerals,Metallurgy and Materials》 (矿物冶金与材料学报（英文版）)

年 卷 期：2014年第21卷第7期

页      面：696-701页

核心收录：

学科分类：0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：This project(No.2010B090400067) was financially supported by the Foshan Science and Technology Bureau the Education Department of Guangdong Province, China 

主　　题：aluminum alloys magnetic field roll-casting mechanical properties 

摘      要：The influences of a 0.2 T static magnetic field on the microstructure of 7075 aluminum alloys sheets produced with a twin-roll continuous caster at 675℃ were investigated in this paper. Under a uniform magnetic field, the primary dendrites were refined and tended to be equiaxed. The microstructure consisted of an intermediate case between dendritic and equiaxed grains. Moreover, the use of an external static field in the twin-roll casting process can reduce heat discharge, resulting in a decrease in undercooling, and may also account for the abatement of segregation bands. In addition, the static magnetic field effectively improved the solute mixing capacity, and the added atoms more easily diffused from precipitates to theα-Al matrix, which resulted in an increase in the mechanical properties of the rolled sheets. Specimens prepared both in the presence of a static magnetic field and in the absence of a static magnetic field exhibited brittle-fracture characteristics.