Effects of Scandium and Zirconium Addition on Recrystallization Behavior of Al-Mg-Si Alloy

被引：9
|
作者：
Ikeda, Ken-ichi [1 ,2 ]
Takashita, Takuya [2 ,3 ,6 ,7 ]
Akiyoshi, Ryutaro [3 ,4 ,6 ]
Hata, Satoshi [4 ,6 ]
Nakashima, Hideharu [4 ,6 ]
Yamada, Kazuhiro [5 ,6 ]
Kaneko, Kenji [5 ,6 ]
机构：
[1] Hokkaido Univ, Fac Engn, Div Mat Sci & Engn, Sapporo, Hokkaido 0608628, Japan
[2] Kyushu Univ, Interdisciplinary Grad Sch Engn Sci, Dept Mol & Mat Sci, Kasuga, Fukuoka 8168580, Japan
[3] Kyushu Univ, Interdisciplinary Grad Sch Engn Sci, Dept Mol & Mat Sci, Kasuga, Fukuoka 8168580, Japan
[4] Kyushu Univ, Fac Engn Sci, Dept Adv Mat Sci & Engn, Kasuga, Fukuoka 8168580, Japan
[5] Kyushu Univ, Fac Engn, Dept Mat Sci & Engn, Fukuoka 8190395, Japan
[6] Kyushu Univ, Kasuga, Fukuoka, Japan
[7] JFE Steel Corp, Chiba 2600835, Japan
来源：
MATERIALS TRANSACTIONS | 2018年 / 59卷 / 04期
关键词：
Al-Mg-Si alloy; recrystallization; precipitation; grain growth; pinning force; ALUMINUM-ALLOYS; AL3SC; SC;
D O I：
10.2320/matertrans.L-M2018802
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effects of thermally stabilized particles on the recrystallization behavior of an Al-Mg-Si alloy were investigated to obtain the fundamental knowledge for controlling the microstructure, texture, and mechanical properties of this alloy. In this study, the Al-Mg-Si-Sc-Zr alloy was cast, homogenized, and hot-rolled. Three types of spherical Al-3(Sc, Zr) particles with Ll(2) structure, rod-like incoherent, spherical semi-coherent, and spherical incoherent particles, were observed in a hot-rolled sample of the Al-Mg-Si-Sc-Zr alloy using transmission electron microscopy (TEM), scanning transmission electron microscopy (STEM), and energy-dispersive X-ray spectroscopy (EDS). In addition, three-dimensional electron tomography (3D-ET) and STEM-EDS revealed that all particles have a core-shell structure with a Sc-enriched core and a Zr-enriched shell. It is considered that these particles are formed during casting, homogenized treatment, and hot rolling. The crystal orientation distribution of the sample after cold rolling indicated that the presence of Al-3(Sc, Zr) particles may interfere with the recrystallization (grain growth) until 600 degrees C. Comparison with the driving force of primary recrystallization and grain growth, and the pinning force of Al-3(Sc, Zr) particles, showed that these particles mainly contribute to the suppression of grain growth. The results of an in-situ heating SEM/EBSD analysis of the cold-rolled Al-Mg-Si-Sc-Zr alloy supported this suggestion.
引用
收藏
页码：590 / 597
页数：8
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