Influence of pre-recovery on recrystallization behavior, microstructure and mechanical properties of twin-roll cast AA6016 sheet

被引：10
|
作者：
Ren, Xianwei [1 ]
Huang, Yuanchun [1 ,2 ]
Zhou, Wenlong [3 ]
Zhao, Likai [4 ]
Wang, Qiang [1 ]
Min, Xudong [1 ]
机构：
[1] Cent S Univ, Light Alloy Res Inst, Changsha, Hunan, Peoples R China
[2] Cent S Univ, State Key Lab High Performance & Complex Mfg, Changsha, Hunan, Peoples R China
[3] Hunan Jiangbin Machinery Grp Co Ltd, Xiangtan, Peoples R China
[4] China Acad Aerosp Elect Technol, 7107 Factory, Beijing, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2019年 / 764卷
基金：
中国国家自然科学基金;
关键词：
Pre-recovery; Twin-roll cast; Grain refinement; Homogeneity; Nucleation; Mechanical properties; MG-SI ALLOYS; AL-MN; HARDENING BEHAVIOR; SUBSEQUENT RECRYSTALLIZATION; ANNEALING TEXTURES; LOW-CARBON; ALUMINUM; EVOLUTION; ANISOTROPY; PRECIPITATION;
D O I：
10.1016/j.msea.2019.138159
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Pre-recovery (PR) treatment and the subsequent recrystallization of twin-roll cast (TRC) AA6016 (Al-1.04Si-0.5Mg-0.4Fe-0.16Mn) sheet are performed. The effects of PR on the recrystallization behavior, grain structure and mechanical properties are investigated. Results reveal that the refinement and homogeneity of the re crystallization grain structure first increase and then decrease when the PR temperature (PRT) is increased. This attributes to the fact that the PR enhances the sub-grain coalescence nucleation (SGCN) when PRT reaches 160 degrees C. As the PRT exceeds 160 degrees C, the SGCN is prevented by the concurrent precipitation, and the number of nuclei decreases, resulting in a coarse and inhomogeneous grain structure. Additionally, mechanical anisotropy (Delta r) of the sheet is weakened by the PR. In particular, the Delta r after PR treatment at 160 degrees C is 0.01, which is significantly smaller than that of the sheet without PR treatment (0.26). The microstructural refinement and high grain structure homogeneity improve the mechanical properties of the TRC AA6016 sheet.
引用
收藏
页数：10
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