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All Journal Jurnal Teknologi dan Riset Terapan (JATRA) Jurnal Pengabdian kepada Masyarakat Politeknik Negeri Batam
Wowo Rossbandrio
Unknown Affiliation
Aerospace Engineering Computer Science & IT Economics, Econometrics & Finance Electrical & Electronics Engineering Engineering Mechanical Engineering

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Pengujian Kekerasan dan Struktur Mikro Sambungan Low-Carbon Steel dan Austenitic Stainless Steel Nugroho Pratomo Ariyanto; Andy Parulian Siregar; Hanifah Widiastuti; Wowo Rossbandrio; Aulia Fajrin; Cahyo Budi Nugroho
Jurnal Teknologi dan Riset Terapan (JATRA) Vol 4 No 1 (2022): Jurnal Teknologi dan Riset Terapan (JATRA) - June 2022
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jatra.v4i1.4111

Abstract

High residual stress can occur in stainless steel and carbon steel weld joints due to difference of thermal expansion coefficients. Corrosion-resistant and mechanical properties of weld joint is affected by stainless steel sensitization, resulted by chromium carbide precipitation, and carbon diffusion on heat-affected zone. This study is conducted to investigate post-weld heat treatment effects of stainless steel 316 and AISI 1018 weld joint with 309L filler metal. As the post-weld heat treatment temperature rises between 400 and 700°C, the hardness value decreases. Observed microstructure of heat-affected zone shows dominance of ferrite phase which experiencing grain growth.
Perawatan dan Perbaikan Dalam Upaya Peremajaan Kapal Batam Marine Ambulance Fauzun Atabiq; Irwanto Zarma Putra; Muhammad Syafei Gozali; Arif Wahyu Budiarto; Muhammad Nurhidayat; Kartika Kartika; Ari Wibowo; Nugroho Pratomo Ariyanto; Nurul Laili Arifin; James Siregar; Wowo Rossbandrio; Muhammad Andi Nova; Rizky Pratama Hudhajanto; Annisa Fyona; Yogantara Yogantara; Meida Perwira Antartika; Rahman Hakim
Jurnal Pengabdian kepada Masyarakat Politeknik Negeri Batam Vol 4 No 1 (2022): Jurnal Pengabdian kepada Masyarakat Politeknik Negeri Batam
Publisher : Pusat P2M Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/abdimas polibatam.v4i1.3759

Abstract

Marine ambulance, as medically equipped vehicle which tranports patient to referral facilites, is very important in Batam archipelago. Routine maintenance activities is conducted to ensure all systems function properly. The maintenance includes maintenance of ship mechanics and ship engines, electrical systems, and hull cleaning. Maintenance standard operating procedure (SOP) is composed to help ship crew conducting ship maintenance. The maintenance activity repairs system problems successfully and appreciated by ship crew, LAZ Batam, and Awal Bros Hospital as service provider; and community who benefited by the service. Healthcare service operates well although some respondents think there is lack of equipments. Safety equipment and medical equipment are not enough for 13% and 20% respondents, respectively. However, all respondent think that the maintenance activity has repaired ship system and ensure ship to operate properly, and deliver healthcare service well.
Studi Replating Area Forepeak & Deep Tank pada Kapal Tanker 105 Meter Berdasarkan Hasil Pengujian Ultrasonic Thickness Test Arif Hidayatullah; Mufti Fathonah Muvariz; Hendra Saputra; Wowo Rossbandrio; Nidia Yuniarsih
Jurnal Teknologi dan Riset Terapan (JATRA) Vol 5 No 1 (2023): Jurnal Teknologi dan Riset Terapan (JATRA) - June 2023
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jatra.v5i1.3655

Abstract

In shipbuilding, various stages of surveys are conducted when a vessel is declared fit for operation, encompassing annual surveys, intermediate surveys, and special/extension surveys. During these surveys, commonly encountered issues include corrosion and reduction in plate thickness associated with the ship's age and year of construction. In cases of significant thickness reduction, replating procedures are implemented. The examination of plate thickness involves ultrasonic testing utilizing the Cygnus Ultrasonic Gauge, with prior visual inspections performed on each plate section. When inspections reveal considerable thickness reduction and indications of corrosion during visual tests, such instances are evident in areas like the forepeak and deep tank. Substantial thickness reduction is noted on both the port and starboard sides, covering a dimension of 1,200 mm × 400 mm along each plate line, employing standard 12 mm thickness material. Test results are obtained for plate lines numbered 1 to 4 on the port and starboard sides of the Forepeak Tank area, as well as plate lines numbered 1 to 3 on the port side and plate lines numbered 1 to 4 on the starboard side within the Deep Tank region.
Pengujian Mekanis dan Korosi pada Weld Overlay Pipa API 5L X65 Hasil Pengelasan GTAW Nugroho Pratomo Ariyanto; Ari Wibowo; Wowo Rossbandrio; Hanifah Widiastuti; Domi Kamsyah
Jurnal Teknologi dan Riset Terapan (JATRA) Vol 5 No 1 (2023): Jurnal Teknologi dan Riset Terapan (JATRA) - June 2023
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jatra.v5i1.5520

Abstract

Pelapisan (cladding) material corrosion resistant alloy (CRA) menggunakan Inconel 625 memadukan properti ketahanan korosi Inconel 625 dan kekuatan (high strength) pipa baja API 5L X65. Sampel lapisan CRA difabrikasi dengan pengelasan Pulsed Gas Tungsten Arc Welding (GTAW). Filler metal ERNiCrMo-3 dengan dua merk yang berbeda, yaitu RW625 dan NM625, digunakan sebagai material CRA. Pengujian non-destruktif berupa visual testing, liquid penetrant testing dan ultrasonic testing menunjukkan tidak terdapat cacat pengelasan pada deposisi lapisan CRA maupun antar-muka lapisan CRA dan base metal. Pengujian kekerasan Vickers menunjukkan NM625 memiliki nilai kekerasan 228 ±8,8 HV10 (layer 1) dan 231.6 ±10,8 HV10 (layer 2), sedangkan RW625 memiliki nilai kekerasan 203.4 ±8,1 HV10 (layer 1) dan 213.6 ±6,3 HV10. Kedua filler metal menghasilkan nilai Pitting Resistance Equivalent Number (PREN) yang sama 48, yang menunjukkan kedua filler metal memiliki properti ketahanan korosi yang sama.
Co-Authors Andy Parulian Siregar Annisa Fyona Ari Wibowo ARIF HIDAYATULLAH Arif Wahyu Budiarto Aulia Fajrin Cahyo Budi Nugroho Domi Kamsyah Fauzun Atabiq Hanifah Widiastuti Hendra Saputra Irwanto Zarma Putra James Siregar Kartika Kartika Meida Perwira Antartika Mufti Fathonah Muvariz Muhammad Andi Nova Muhammad Nurhidayat Muhammad Syafei Gozali Nidia Yuniarsih Nugroho Pratomo Ariyanto Nurul Laili Arifin Rahman Hakim Rizky Pratama Hudhajanto Yogantara Yogantara