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All Journal G-Tech : Jurnal Teknologi Terapan Mechanical Engineering for Society and Industry
Mochammad Noer Ilman
Universitas Gadjah Mada, Indonesia
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation

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The Influence of Tool Rotational Speed on Mechanical Properties of Friction Stir Welded Dissimilar AA5083-H112/AA6061-T6 Joints Andrian Permana; Mochammad Noer Ilman
G-Tech: Jurnal Teknologi Terapan Vol 8 No 1 (2024): G-Tech, Vol. 8 No. 1 Januari 2024
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33379/gtech.v8i1.3623

Abstract

The relatively new and innovative welding technique known as friction stir welding (FSW) has found widespread application in the automotive, railway, and aircraft industries. Due to engineering and financial considerations, welding of dissimilar metals is frequently carried out in these industries. During the friction stir welding process, three tool rotational speeds—910, 1500, and 2280 rpm—were utilized, while the welding speed remained constant at 30 mm/min. Several experimental works, including fractography, tensile tests, and observations of the microstructure, were carried out following welding. Results showed that ultimate tensile strength (UTS) and yield strength (YS) expanded as the tool rotational speed was expanded and the best UTS and YS, typically 228 MPa and 156 MPa at the speed of 2280 rpm. The precipitation of AA6061-T6 in the stir zone (SZ) and the increased degree of mixing were linked to the improved weld strengths.
Microstructures and mechanical properties of friction stir dissimilar AA2024-O/AA6061-T6 welded joints at varying tool rotational speeds Diana Puspita Sumarno; Mochammad Noer Ilman
Mechanical Engineering for Society and Industry Vol 5 No 1 (2025)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/mesi.13499

Abstract

Friction Stir Welding (FSW) is an innovative solid-state welding technique, especially for joints of unweldable metals or even dissimilar metals. In this study, FSW processes of two dissimilar metals, namely AA2024-O and AA6061-T6, were done at different tool rotational speeds of 910, 1500, and 2280 rpm whilst the welding speed was kept constant at 30 mm/min. This research was intended to improve the mechanical properties of the dissimilar FSW joints. A cylindrical pin-equipped tool was selected, and it was tilted at an angle of 2o during welding. Afterwards, microstructural observations, microhardness, and tensile tests were done. Results demonstrated that increasing tool rotation increased the peak temperature, accompanied by better mixing of different metals in the weld nugget zone (WNZ), hence resulting in improved microstructural homogeneity. The hardness distributions for all dissimilar FSW joints were characterized by the appearance of a high hardness region in the central part of WNZ, resulting in a peak of hardness. It was obtained that the FSW joint at 1500 rpm revealed the best ultimate tensile strength (UTS) around 170.38 MPa, which could be a result of precipitation hardening combined with a better homogeneity in WNZ.
Co-Authors Andrian Permana Diana Puspita Sumarno