Through-Thickness Texture Gradient and Microstructure of Rolling Al-Mg-Si Alloy

被引：0
|
作者：
Li H. [1 ,2 ]
Wang J. [3 ]
Yan Z. [2 ]
Mi Z. [3 ]
Jiang H. [3 ]
机构：
[1] College of Engineering, Yantai Nanshan University, Yantai
[2] National Engineering Rresearch Center for Plastic Working of Aluminum Alloys, Shandong Nanshan aluminum Co., Ltd., Yantai
[3] Engineering Research Institute, University of Science and Technology Beijing, Beijing
来源：
Xiyou Jinshu/Chinese Journal of Rare Metals | 2019年 / 43卷 / 03期
关键词：
6XXX series aluminum alloy; PSN effect; Recrystallization; Texture;
D O I：
10.13373/j.cnki.cjrm.XY18030017
中图分类号：
学科分类号：
摘要：
The textures and microstructure evolution along thickness direction in an Al-Mg-Si aluminum alloy thick sheet were studied through mechanical property tests, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD) measurements. The results revealed that the texture types were quite different from surface to center. The shear texture components r-cube {001}<110> mainly existed in the surface layer. However, the plane strain textures belonged to β fiber including C{112}<111>, S{123}<634> and B{011}<211> dominated the center layer. It was generally accepted that the recrystallization grains in the transition layer were inclined to nucleate and grow taking along micro-scale particles due to precipitation simulate nucleation (PSN) effects during hot rolling process, which induced the strong radiation of orientation densities and the occurrence of random textures P{011}<122>. In addition, the formation ofcube textures in the center layer were attributed to the nearly 40°<111> misorientation between S components and cube oriented recrystallization grains. The micro-growth model (OG) predicted that such grain boundaries with this misorientation appeared to have high mobility, enabling them to gain a local size advantage as compared to any alternative non-cube nuclei and took possession of adjacent S texture components. © Editorial Office of Chinese Journal of Rare Metals. All right reserved.
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页码：265 / 273
页数：8
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