Identification of the influence of micro two-stage refilled friction stir spot welding with variation dwell time on dissimilar brass CuZn30-aluminum AA1100

Authors

DOI:

https://doi.org/10.15587/1729-4061.2023.276484

Keywords:

Friction Stir Spot Welding, mTS-RFSSW, Brass CuZn30, AA1100, dwell time

Abstract

Welding and joining of brass CuZn30-aluminum AA1100 were obtained using micro two-stage refilled friction stir spot welding (mTS-RFSSW), which was carried out to eliminate the holes formed by the micro friction stir spot welding (mFSSW) process. The mTS-RFSSW process begins with the mFSSW welding process using tools with a pin inner diameter of 2.69 mm, pin outer diameter 1.811 mm and shoulder diameter of 4.954 mm, followed by a second stage process called mTS-RFSSW, which is a hole closing process using a tool with a pinless tool with shoulder diameter 4.954 mm. This study aimed to determine the effect of the second stage of dwell time on the mechanical properties produced in the mTS-RFSSW welding technique using brass CuZn30 and aluminum AA1100 with a thickness of 0.42 mm. In this study, the variable parameter is the second stage dwell time which varies from 3 s, 4 s, 5 s, and 6 s, respectively. An optical microscope that aims to observe the macrostructure shows that an upward hook is formed in each joining process. Based on the scanning electron micrograph, the resulting formation of different intermetallic compounds (IMC) with varying thicknesses occurs in every variation of dwell time. The high dwell time indicates discontinued IMC, which affects the tensile force. The IMC formed at the interface of brass CuZn30 and aluminum AA1100 is dominated by more than 30 % Cu. The highest hardness value is found in the stir zone because the formation of intermetallic compounds influences refined grains. The highest maximum shear force and cross tensile force was obtained 371.35 N and 54.88 N, respectively, in the dwell time of 3 s. The result of fracture properties after the lap shear test shows the presence of small dimples with microcracks that indicate brittle failure

Author Biographies

Pathya Rupajati, Universitas Indonesia

Postgraduate Student

Department of Mechanical Engineering

Ario Sunar Baskoro, Universitas Indonesia

Doctorate, Professor

Department of Mechanical Engineering

Latitia Dhayita Pramudito, Universitas Indonesia

Undergraduate Student

Department of Mechanical Engineering

Laksita Aji Safitri, Universitas Indonesia

Postgraduate Student

Department of Mechanical Engineering

Mohammad Azwar Amat, Universitas Indonesia

Postgraduate Student

Department of Mechanical Engineering

Gandjar Kiswanto, Universitas Indonesia

Doctorate, Professor

Department of Mechanical Engineering

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Identification of the influence of micro two-stage refilled friction stir spot welding with variation dwell time on dissimilar brass CuZn30-aluminum AA1100

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Published

2023-06-30

How to Cite

Rupajati, P., Baskoro, A. S., Pramudito, L. D., Safitri, L. A., Amat, M. A., & Kiswanto, G. (2023). Identification of the influence of micro two-stage refilled friction stir spot welding with variation dwell time on dissimilar brass CuZn30-aluminum AA1100. Eastern-European Journal of Enterprise Technologies, 3(12 (123), 6–14. https://doi.org/10.15587/1729-4061.2023.276484

Issue

Vol. 3 No. 12 (123) (2023): Materials Science

Section

Materials Science

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Copyright (c) 2023 Pathya Rupajati, Ario Sunar Baskoro, Latitia Dhayita Pramudito, Laksita Aji Safitri, Mohammad Azwar Amat, Gandjar Kiswanto

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