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All Journal Turbo : Jurnal Program Studi Teknik Mesin Scientific Journal of Mechanical Engineering Kinematika Jurnal Polimesin
Suprianto Suprianto
Universitas Sumatera Utara
Automotive Engineering Control & Systems Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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STUDI KARAKTERISTIK LASAN ALUMUNIUM 6061-T6 DENGAN BERBAGAI METODE PENGELASAN Josua Simaremare; Suprianto Suprianto
Scientific Journal of Mechanical Engineering Kinematika Vol 10 No 2 (2025): SJME Kinematika Desember 2025
Publisher : Mechanical Engineering Department, Faculty of Engineering, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/sjmekinematika.v10i2.751

Abstract

Tungsten inert gas (TIG) and Metal inert gas (MIG) welding have been used to join varying materials; however, shielded metal arc Welding (SMAW) is rarely used for aluminum. This study aims to investigate the weld quality by using three welding methods for joining aluminum 6061-T6. The Welding process was carried out using a welding machine combination with an AWS electrode: E4043, filler consisting of ER 4043 0.8 and ER 4043. Defect inspection was performed using Dye Penetrant Check, Vickers hardness test, and tensile strength were carried out at room temperature. Visual observation of the microstructure at the weld and heat-affected zone (HAZ) areas with 200x magnification by using an optical microscope. The result shows more defects formed with SMAW in comparison with the TIG and MIG methods. The highest hardness, 63.8 HV, was achieved at the HAZ area, and a tensile strength of 195.4 MPa was obtained using the MIG technique. Microstructural observations reveal that the transformation in the HAZ area resulted in flat and coarse-grained structures.
Investigation of microstructural, mechanical, and electrical characteristics of CuNi5W alloy synthesized by warm compaction Agung Ardiansyah; Bagus Prasetiyo; Suprianto Suprianto; Irfan Sitorus
Jurnal Polimesin Vol 23, No 6 (2025): December
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i6.7568

Abstract

In the Electric Discharge Machining (EDM) process, electrode materials require high electrical conductivity and sufficient mechanical strength. These electrodes can be fabricated by the Powder Metallurgy (PM) technique from copper-based alloys. The electrode strength can be improved by adding refractory materials through a properly selected warm compaction parameter, such as temperature and pressure compaction. The study focused on analyzing microstructural changes, compressive strength, hardness, and electrical behavior of the alloy. High-purity (Cu, Ni, W) elements were synthesized by warm compaction with different penetration loads and temperatures to produce CuNi5W alloys. The physical, mechanical, and electrical testing were carried out at room temperature. The results indicate that incorporating tungsten (W) into Cu-Ni-based alloys, combined with higher compaction temperatures and pressures during warm compaction, leads to an improvement in density, hardness, and electrical conductivity. The optimum values for these properties were achieved in the Cu-Ni-W-based alloy compacted at 250°C and 250 MPa. The CuNi5W alloys exhibited a microstructure characterized by a solid solution matrix in which tungsten particles were evenly distributed, playing a key role in enhancing the hardness of the model CuNi5W-based alloy.
The Effect of Composition and Sintering Temperature on the Characteristics of xCu-yNi-5 wt.%W Alloy as a Candidate Electrode Material Dwiki Rifhardi Siregar; Muhammad Farhan Azmi; suprianto suprianto; Muhammad Akhsal
TURBO [Tulisan Riset Berbasis Online] Vol 14 No 2 (2025): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v14i2.4124

Abstract

Paduan berbasis Cu banyak digunakan sebagai komponen kelistrikan seperti elektroda. Terdapat beberapa komponen yang dioperasikan pada lingkungan temperatur tinggi, kondisi ini menyebabkan terjadinya penurunan kekuatan paduan logam yang pada akhirnya menyebabkan kegagalan pada komponen tersebut. Permasalahan ini dapat diminimalisir melalui usaha peningkatan kekuatan tanpa mengabaikan penurunan konduktivitas listrik paduan berbaasis Cu. Penelitian ini bertujuan untuk mengetahui pengaruh rasio komposisi Cu/Ni dan temperatur sintering terhadap sifat mekanis dan konduktivitas listrik paduan Cu-Ni-5 wt.%W. Sintesis model paduan Cu-Ni-W dilakukan menggunakan teknik metalurgi serbuk menggunakan serbuk dengan kemurnian tinggi. Proses pencampuran serbuk menggunakan horizontal milling, dilanjutkan kompaksi pada temperatur ruang untuk mendapatkan green material diikuti proses sintering pada temperatur 770-870oC. Bulk material yang diperoleh dari proses sintering dilakukan karakterisasi dengan berbagai cara diantaranya pengujian kekerasan Vickers, tekan, konduktivitas listrik, dan observasi mikrostruktur. Hasil penelitian diperoleh  peningkatan rasio Cu/Ni dan temperatur sintering cenderung meningkatkan sifat mekanis, namun penambahan Ni hingga 30 wt.% menyebabkan penurunan konduktivitas listrik.
Co-Authors Agung Ardiansyah Bagus Prasetiyo Dwiki Rifhardi Siregar Irfan Sitorus Josua Simaremare Muhammad Akhsal Muhammad Farhan Azmi