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<p>Strength properties are important design considerations for many aluminum joint structures operated under cyclic loads, such as aircraft, ships, trains, and car bodies. Various aircraft body treatments have been developed to improve the quality of riveted joints through modification of riveted joints, microstructures, and mechanical testing. Through the development of appropriate joining techniques, stronger material joints for aircraft construction will be obtained. In this study, pre-treatment was carried out on rivet installation, the drilling process, and rotational spot welding below the material melting point, FSSW, of 2024-T3 aluminum alloy plates at a speed of 2500&#xa0;rpm to increase the strength of rivets and joints. Experimental work, including observation of microstructure, microhardness, and shear tests, has been carried out. The results show that in the process of joining AA2024-T3 aircraft materials, the tensile shear strength, namely, the FSSW method is 289&#xa0;MPa, and the drill is 252&#xa0;MPa. This means that the use of the FSSW method on AA2024-T3 aluminum joints produces a tensile-friction strength of 289&#xa0;MPa, 33.3% better than the drilling method (252&#xa0;MPa), and a microhardness of 153 HV in the HAZ zone, an increase of 53% from 144.5 HV. This increase is due to the improvement of the grain structure and the addition of equiaxial dendritic microstructures.</p>

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Comparison between microstructure, mechanical properties of AA2024-T3 rivet joints using FSSW and drilling mechanisms

  • 期刊论文

  • 发表日期：

    2026年5月12日

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  • Sehono,
  • Haris Ardianto

摘要

Strength properties are important design considerations for many aluminum joint structures operated under cyclic loads, such as aircraft, ships, trains, and car bodies. Various aircraft body treatments have been developed to improve the quality of riveted joints through modification of riveted joints, microstructures, and mechanical testing. Through the development of appropriate joining techniques, stronger material joints for aircraft construction will be obtained. In this study, pre-treatment was carried out on rivet installation, the drilling process, and rotational spot welding below the material melting point, FSSW, of 2024-T3 aluminum alloy plates at a speed of 2500 rpm to increase the strength of rivets and joints. Experimental work, including observation of microstructure, microhardness, and shear tests, has been carried out. The results show that in the process of joining AA2024-T3 aircraft materials, the tensile shear strength, namely, the FSSW method is 289 MPa, and the drill is 252 MPa. This means that the use of the FSSW method on AA2024-T3 aluminum joints produces a tensile-friction strength of 289 MPa, 33.3% better than the drilling method (252 MPa), and a microhardness of 153 HV in the HAZ zone, an increase of 53% from 144.5 HV. This increase is due to the improvement of the grain structure and the addition of equiaxial dendritic microstructures.