Microstructure and properties of 2219 aluminum alloy fabricated via additive friction stir deposition

• Published in: Hang kong cai liao xue bao Vol. 44; no. 1; pp. 152 - 162
• Main Authors: Wang, Ruilin, Yang, Xinqi, Tang, Wenshen, Luo, Ting, Zhao, Yaobang, Dou, Enhui
• Format: Journal Article
• Language: Chinese
• Published: Beijing Beijing Institute of Aeronautical Materials 01.02.2024; Journal of Aeronautical Materials
• Subjects: 2219-t87 aluminum alloy; additive friction stir deposition(afsd); Aluminum alloys; Aluminum base alloys; Deposition; Ductile fracture; Dynamic recrystallization; Grain size; Hardness; Mechanical properties; Microstructure; microstructures; Multilayers; Process parameters; Tensile strength; Thermal cycling
• ISSN: 1005-5053
• DOI: 10.11868/j.issn.1005-5053.2023.000158

The additive friction stir deposition(AFSD) experiment of 2219 aluminum alloy was conducted under the process parameters of the spindle rotational speed of 250-350 r/min and transverse speed of 50-150 mm/min,the effects of varying process parameters and multilayer thermal cycling on the macroscopic forming of deposited materials, microstructures and mechanical properties were investigated. The results show that well-formed single-pass 16-layer additive specimens can be successfully obtained under the process parameters of the spindle rotational speed of 250 r/min and the traverse speed of 100 mm/min. The grain size in the additive zone undergoes significant refinement, ranging from 4 to 6 μm,and the fine equiaxial crystal organization replaces the coarse irregular grain organization characteristic of the feed rod. The additive specimen undergoes intense dynamic recrystallization,with overall recrystallized grains above 80%,and the bottom of the specimen(the 1st Layer)is subjected to multiple thermal cycles,wi