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All Journal IPTEK Journal of Proceedings Series Transmisi Rekayasa Mesin Teknika: Jurnal Sains dan Teknologi Jurnal Furnace Prosiding Semnastek Widyariset VANOS Journal of Mechanical Engineering Education Jurnal Teknika Metal Indonesia Metalurgi Jurnal Metalurgi dan Material Indonesia Widyariset Metalurgi
Alfirano Alfirano
Jurusan Teknik Metalurgi, Fakultas Teknik, Universitas Sultan Ageng Tirtayasa
Aerospace Engineering Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Immunology & microbiology Industrial & Manufacturing Engineering Library & Information Science Materials Science & Nanotechnology Mechanical Engineering Neuroscience Physics

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UPAYA PERBAIKAN SIFAT MEKANIK BAJA PLAT JOIN G 3131 SPHC MELALUI SIMULASI PROSES INTERCRITICAL ANNEALING DI INDUSTRI KONSTRUKSI BAJA Fathoni, Imam Nur; Alfirano, Alfirano; Muljono, Djoko
Jurnal Rekayasa Mesin Vol. 14 No. 3 (2023)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v14i3.1649

Abstract

Improvement of the mechanical properties of G3131 SPHC equivalent to JIS G 3101 SS330 plate joint steel through intercritical annealing simulations has been carried out. The JIS G 3131 grade SPHC steel was gradually heated by intercritical annealing at temperatures of 750–850 oC for holding times of 1–15 minutes. After intercritical annealing treatment, the tensile strength and yield strength of steel increased compared to non-treatment samples. The average tensile strength obtained was 573 MPa with an increase of 76.85% compared to the tensile strength before the intercritical annealing process. Meanwhile, the yield strength of steel increased by 60% to 421 MPa. Increasing the annealing temperature and holding time will promote the formation of the martensite phase, as well as enlarge the austenite and ferrite grains. Optimal heating variable obtained at a temperature of 750 ℃ with a holding time of 15 minutes. Using these variables produced a tensile strength of 625 MPa and a yield strength of 434 MPa with an elongation of 23% which is standardly included in JIS G 3101 SS400.At the optimal value, the grain growth kinetic of K and n values were 0.280466778 and 0.6905, respectively, with an activation energy (Q) of 12.4268517 J/mol.
PENGARUH TEMPERATUR AUSTEMPERING TERHADAP SIFAT MEKANIK DAN STRUKTUR MIKRO BESI COR KELABU DENGAN NIKEL 10% UNTUK KOMPONEN BOILER PLTU Widyansyah, Fikri; Mabruri, Efendi; Alfirano, Alfirano
Jurnal Rekayasa Mesin Vol. 14 No. 3 (2023)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v14i3.1650

Abstract

Effect of austempering temperature on microstructure and mechanical properties gray cast iron with 10%wt nickel for boiler combustion application has been studied. Cast iron with the JIS FCD 45 standard with a minimum tensile strength of 414 MPa and a hardness of 187 HB is commonly used for this application. To improve its mechanical properties such as strength and hardness, austempering heat treatment usually applied. Austempering was carried out at 250°C, 300°C, 350°C, 400°C, and 450°C for 1 hour, with the same austenization temperature of 850°C for 1 hour. The highest increase in hardness was found at the austempering temperature of 250°C. The hardness was 321.80 HB or 19.30% of the initial hardness of 259.70 HB. In terms of strength, the highest increase occurred at the austempering temperature of 250°C which was 257 MPa or 31.52% of the initial strength of 176 MPa.
KARAKTERISTIK MEKANIK ALUMINIUM PADUAN HASIL KOMPARASI PROSES EQUAL CHANNEL ANGULAR PRESSING VS ROLLING: Severe Plastic Deformation (S.P.D) Pramono, Agus; Alhamidi , Ahmad A.; Firmansyah, Asep A.; Suryana, Suryana; Alfirano, Alfirano; Ridwan, Asep
Jurnal Rekayasa Mesin Vol. 16 No. 1 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v16i1.1672

Abstract

Aluminum alloys are vital in industries such as automotive, aerospace, and manufacturing due to their strength, lightweight, and corrosion resistance. To enhance their mechanical performance and energy efficiency, advanced methods like severe plastic deformation (SPD) have been explored, with equal channel angular pressing (ECAP) proving effective in refining grain structures and improving material properties. ECAP was applied to the AA5XXX series aluminum alloy using a fixed-section die with a mold groove angle of 105°  and a curve angle of 75º, while keeping the cross-sectional dimensions of the specimen constant. Route C was employed, involving a variable number of passes. Subsequently, the results of the ECAP process were further enhanced through a 50% reduction roll process. A significant increase in strength and hardness was observed when comparing the combination of ECAP and 50% rolling with ECAP alone. The mechanical properties increased by 58.11% for the first pass, 58.66% for the second pass, 58.92% for the third pass, and 59.19% for the fourth pass. Grain refinement also exhibited substantial improvement in this combined process, with increases of 68.18% for the first pass, 77.59% for the second pass, 85.71% for the third pass, and 87.38% for the fourth pass. Pure ECAP yielded a maximum strength of 251 MPa and a hardness of 78.43 HB, while the combination of ECAP with 50% rolling achieved a maximum strength of 277 MPa and a hardness of 86.17 HB. This research successfully increased tensile strength and hardness while altering the microstructure grain size morphology.
Co-Authors A. Ali Alhamidi Adhitya Trenggono Adhitya Trenggono Adhitya Trenggono, Adhitya Agus Pramono Alhamidi , Ahmad A. Ali Alhamidi Andinnie Juniarsih Angga Pamilu Putra Anistasia Milandia Anistasia Milandia Anne Zulfia Anwar, Moch. Syaiful Asep Ridwan Cahya Sutowo Dikki Purwantoni Efendi Mabruri Efendi Mabruri Fatah Sulaiman Fathoni, Imam Nur Fendy Rokhmanto Firmansyah, Asep A. Ika Wulandari Imam Nur Fathoni Kevin kevin Kevin, Mikhael Kisnandar, Kisnandar Mabruri, Efendi Merliana K. Waluyo Mikhael Kevin moch syaiful anwar Moch. Syaiful Anwar Muhammad Dimaz Muhammad Fitrullah, Muhammad Muljono, Djoko Rike Kemala Putri Riyangga Purnawansya Ardhi Roihaposan Nikolas Sembiring Saefudin Saefudin Sari, Bintang Purna Sumirat, Iwat Suryana Suryana Suryana Suryana Widyansyah, Fikri