Mechanism of dislocation promoting Al13Fe4 precipitation during friction stir-assisted incremental sheet forming in AA5052 sheet

被引：8
作者：
Yang, Mei [1 ]
Chang, Zhidong [1 ]
Chen, Jun [1 ]
An, Dayong [1 ]
机构：
[1] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Dept Plast Technol, Shanghai 200030, Peoples R China
来源：
MATERIALS LETTERS | 2022年 / 315卷
基金：
中国国家自然科学基金;
关键词：
Aluminum alloy; Incremental sheet forming; Microstructure; Precipitation; Dislocation; Segregation; MICROSTRUCTURE; SEGREGATION;
D O I：
10.1016/j.matlet.2022.131976
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The precipitation behavior of Al13Fe4 in AA5052 sheet during friction stir-assisted incremental sheet forming (FS-ISF) is investigated in the present work. It is found that the sizes of both incoherent and semi-coherent precipitates enlarge, and their contents increase with the increasing temperature caused by the high-speed rotation of the tool. Dense dislocations emerge and interact around these precipitates. Transmission electron microscopy (TEM) analysis reveals that dislocations can induce precipitation through prompting atomic segregations of Fe and Al elements. The strength of FS-ISFed AA5052 is further enhanced compared with conventional incremental sheet forming at room temperature (RT-ISF).
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页数：4
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