Effect of soft Bi particles on grain refinement during severe plastic deformation

被引：8
|
作者：
Jia, Hai-long [1 ]
Marthinsen, K. [1 ]
Li, Yan-jun [1 ]
机构：
[1] Norwegian Univ Sci & Technol, Dept Mat Sci & Engn, N-7491 Trondheim, Norway
来源：
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2017年 / 27卷 / 05期
关键词：
Al alloys; equal channel angular pressing (ECAP); Bi particle; grain refinement; hardness; TRANSIENT DIRECTIONAL SOLIDIFICATION; MONOTECTIC AL-BI; IMMISCIBLE ALLOYS; ALUMINUM-ALLOYS; EVOLUTION; RECRYSTALLIZATION; MICROSTRUCTURE; MECHANISMS;
D O I：
10.1016/S1003-6326(17)60114-6
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
Two aluminum alloys, Al-8Zn and Al-6Bi-8Zn were subjected to equal channel angular pressing (ECAP) up to 5 passes at room temperature. The microstructural evolution and the grain refinement behavior of these alloys were systematically studied by electron backscatter diffraction (EBSD). After 5 passes of ECAP, ultrafine grained microstructures formed in both alloys. However, the grain structure in the Al-6Bi-8Zn alloy is much finer than that of Al-8Zn alloy, showing that the soft Bi particles have a strong influence on enhancing the grain refinement during ECAP. The strengths of the ECAP-processed materials were measured by hardness test and it showed that after 5 passes of ECAP, the hardness of the Al-6Bi-8Zn alloy was higher than that of the Al-8Zn alloy. The effects of soft Bi particles on the deformation behavior during ECAP and the final strength of the Al-6Bi-8Zn alloy were discussed.
引用
收藏
页码：971 / 976
页数：6
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