Friction stir welding of wire arc additively manufactured 205A aluminum alloy: Microstructure and mechanical properties

被引：24
作者：
Zhou, Siyu [1 ,2 ]
Wu, Ke [1 ]
Yang, Guang [1 ]
Wu, Bin [3 ]
Qin, Lanyun [1 ]
Guo, Xinpeng [4 ]
Wang, Xiangming [2 ]
机构：
[1] Shenyang Aerosp Univ, Sch Mechatron Engn, Shenyang 110136, Peoples R China
[2] AVIC Grp, Shenyang Aircraft Design Inst, Shenyang 110035, Peoples R China
[3] Tsinghua Univ, Sch Aeronaut & Astronaut, Beijing 100084, Peoples R China
[4] Univ Wollongong, Sch Mech Mat & Mechatron & Biomed Engn, Wollongong, NSW 2522, Australia
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2023年 / 876卷
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
WAAM; FSW; 205A; Microstructure; Mechanical properties; RECRYSTALLIZATION MECHANISMS; TENSILE PROPERTIES; FRACTURE-BEHAVIOR; HEAT INPUT; EVOLUTION; PRECIPITATION; PARAMETERS; HARDNESS; ZONE;
D O I：
10.1016/j.msea.2023.145154
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Friction stir welding (FSW) was used to weld the 205 A aluminum alloy parts fabricated by wire arc additive manufacturing (WAAM). The microstructure characteristic, phase structure and dislocation were systematically investigated, and the mechanical properties of the FSW joint were evaluated. The results show that the pores in the weld were almost eliminated, and the fine recrystallized grains with a size of about 5 & mu;m were obtained in the stir zone. Under the effects of severe plastic deformation and heat, the & theta; phases were broken and partially dissolved in the weld during the FSW process, and the & theta;& PRIME; strengthening phases were precipitated by the promotion of Cd. Compared to the WAAM-fabricated 205 A base material, the FSW joint maintained high strength and improved plasticity because of the precipitation strengthening of & theta;& PRIME; phases and the grain boundary strengthening of fine recrystallized grains.
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页数：14
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