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All Journal Infotekmesin Suara Teknik : Jurnal Ilmiah
Kurniawan Nasution, Fadly Ahmad
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Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Engineering Materials Science & Nanotechnology Mechanical Engineering

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Studi Karakteristik Komposit Matrik Logam Al-Cu-Mg Dengan Penambahan SiC Disintesis Menggunakan Teknik Metalurgi Serbuk Diikuti Artificial Aging Suprianto; Rasyid Nasution, Bakri; Karo Karo, Junsean Christian; M. Rafli; Kurniawan Nasution, Fadly Ahmad
Infotekmesin Vol 16 No 1 (2025): Infotekmesin: Januari 2025
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v16i1.2503

Abstract

The improvement of the characteristics of Al-Cu-Mg through SiC addition and precipitate formation can be achieved through powder metallurgy and artificial aging, which means that the correct amount of particles and holding time are important. This research aims to investigate the effect of SiC and time on microstructure change, mechanical properties, and electricity. The Al, Cu, Mg, and (1~2.0) wt.%SiC powder were mixed by horizontal milling and subsequent sintering at 500oC. The artificial aging at 180oC with (2, 4, 6) hour holding times. The hardness test, compression, electrical conductivity, and microstructural observation were carried out. The results show that the addition of SiC particles improves the strength and reduces the conductivity. The conductivity improvement obtained after aging. SiC particles tend to be dispersed between grain boundaries. Based on the data, it can be concluded that SiC and artificial aging have a positive effect on the mechanical properties of Al-Cu-Mg alloy.
THE EFFECT OF VARIATION IN CURRENT STRENGTH OF 90A, 100A, AND 110A IN SMAW WELDING ON THE MECHANICAL PROPERTIES OF ASTM A-36 MATERIAL Kurniawan Nasution, Fadly Ahmad; Nasution, Ahmad Yunus; Irwan, Ade; Fransiskus Manullang, Ileando Putra
Suara Teknik : Jurnal Ilmiah Vol 15 No 1 (2024): Suara Teknik: Jurnal Ilmiah
Publisher : Fakultas Teknik UM Pontianak

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29406/stek.v15i1.7086

Abstract

ASTM A-36 material is widely used in the industrial world. ASTM A-36 steel plates are selected for mechanical property and microstructure testing by applying heat, specifically welding. This study employs the Shielded Metal Arc Welding (SMAW) method with varying current strengths of 90 A, 100 A, and 110 A. The aim of these tests is to identify defects, mechanical properties, and microstructure appearance resulting from welding ASTM A-36 steel for boiler applications in palm oil mills. The tests conducted showed that the highest average tensile strength was achieved with SMAW welding at 90 A, reaching 535.29 MPa, while the lowest was at 110 A, with 428.12 MPa. The highest average hardness test value was recorded for SMAW welding at 90 A, with a hardness value of 257.3 VHN in the Base Metal area, whereas the lowest was observed in welding with 100 A current strength, measuring 193.1 VHN in the Weld Area. Visual inspection of surface welding defects using the Penetrant Test method revealed the least number of defects in SMAW welding with 90 A and 100 A currents, consisting of two types of welding defects (Hot Cracks and porosity). Based on microstructure observation, the best visual appearance was observed in SMAW welding with 100 A current strength, attributed to its denser microstructure.
Studi Karakteristik Komposit Matrik Logam Al-Cu-Mg Dengan Penambahan SiC Disintesis Menggunakan Teknik Metalurgi Serbuk Diikuti Artificial Aging Suprianto; Rasyid Nasution, Bakri; Karo Karo, Junsean Christian; M. Rafli; Kurniawan Nasution, Fadly Ahmad
Infotekmesin Vol 16 No 1 (2025): Infotekmesin: Januari 2025
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v16i1.2503

Abstract

The improvement of the characteristics of Al-Cu-Mg through SiC addition and precipitate formation can be achieved through powder metallurgy and artificial aging, which means that the correct amount of particles and holding time are important. This research aims to investigate the effect of SiC and time on microstructure change, mechanical properties, and electricity. The Al, Cu, Mg, and (1~2.0) wt.%SiC powder were mixed by horizontal milling and subsequent sintering at 500oC. The artificial aging at 180oC with (2, 4, 6) hour holding times. The hardness test, compression, electrical conductivity, and microstructural observation were carried out. The results show that the addition of SiC particles improves the strength and reduces the conductivity. The conductivity improvement obtained after aging. SiC particles tend to be dispersed between grain boundaries. Based on the data, it can be concluded that SiC and artificial aging have a positive effect on the mechanical properties of Al-Cu-Mg alloy.
Co-Authors Fransiskus Manullang, Ileando Putra Irwan, Ade Karo Karo, Junsean Christian M. Rafli Nasution, Ahmad Yunus Nurwijayanti Rasyid Nasution, Bakri Wiwik Handayani