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All Journal Jurnal Kimia dan Kemasan JURNAL INTEGRASI Jurnal Teknologi dan Riset Terapan (JATRA) Jurnal Pengabdian kepada Masyarakat Politeknik Negeri Batam
Nurul Laili Arifin
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Aerospace Engineering Chemistry Computer Science & IT Economics, Econometrics & Finance Electrical & Electronics Engineering Engineering Mechanical Engineering Other

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Journal : JURNAL INTEGRASI

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Analisis Pengaruh Heart Rate Variability Dalam Penggunaan Welding Simulator Terhadap Performance Welder Nurul Laili Arifin; Fedia Restu
JURNAL INTEGRASI Vol 10 No 1 (2018): Jurnal Integrasi - April 2018
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/ji.v10i1.693

Abstract

VIMS (Visual Induced Motion Sickness) yang dialami oleh operator alat welding simulator dapat diukur menggunakan HRV (Heart Rate Variability) sebagai penilaian objektif dan SSQ (Simulator Sickness Quesioner) sebagai penilaian subjektif. Pengukuran parameter tersebut dapat mengetahui ada atau tidaknya pengaruh manusia terhadap performance operator simulator welding. Adapun tujuan dari penelitian ini adalah mencari hubungan antara pengaruh heart rate variability dalam penggunaan welding simulator terhadap performance welder. Heart Rate diukur selama simulasi kemudian dianalisis lebih lanjut menggunakan software. Pada penilaian HRV, ternyata heart rate berpengaruh secara signifikan terhadap penggunaan alat welding simulator yaitu (F(2,23) = 3.670, p<0.05). Hasil ini menunjukkan bahwa dalam penggunaan welding simulator dalam jangka waktu yang lama akan berpengaruh pada kestabilan heart rate pada welder. Sedangkan, dari segi performance welder, diketahui posisi vertikal memiliki nilai tertinggi dengan skor 1344,35 yang menunjukkan bahwa posisi vertikal adalah posisi yang paling mudah dikuasai dibandingkan dengan posisi flat 1239,96 dan over head 1181,73.
Pengaruh Holding Time Annealing terhadap Perubahan Mikrostruktur Baja Struktur S690QL dan S235JR Ari Wibowo; Hanifah Widiastuti; Nurul Laili Arifin; Nugroho Pratomo Aryanto
JURNAL INTEGRASI Vol 13 No 1 (2021): Jurnal Integrasi - April 2021
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/ji.v13i1.2881

Abstract

The S690 and S235JR structural steels are widely used in heavy equipment for the main frame structure. In general, the fabrication processes of heavy equipment involve welding processes that could change the mechanical properties of the materials. Therefore, in the fabrication process involving those steels, a heat treatment process is carried out after welding to modify the mechanical properties. The heat treatment process is conducted mainly to eliminate residual stresses and to reduce brittleness through the annealing process. In this study, annealing was carried out on the two steels to observe the effect of the heat treatment process on the hardness and microstructure of the material. The annealing process was conducted at 760 oC, holding time varied at 2, 4, 6, 8 and 10 hours, and a cooling rate of 20 oC/hour. After the annealing process, observations with a metallurgical microscope were done to see the final microstructure, followed by testing material hardness using the Rockwell B method. The test results showed that the annealing holding time affected the phases and grain size as well as the hardness of the steel S690 and S235JR. The largest grain size is formed with a holding time of 10 hours while the lowest hardness is also obtained at a holding time of 10 hours. Annealing holding time also affects the phase change from fine bainite to ferrite with large grains on S690 and reduces the size of pearlite on S235JR. The test results also show that long holding time has the potential to cause a decarburization effect on steel.
Co-Authors Abulija Maskarai Ari Wibowo Ari Wibowo Asrafi Asrafi Aulia Fajrin Benny Haddli Irawan Budi Baharudin Domi Kamsyah Fedia Restu Hanifah Widiastuti Ihsan Saputra James Siregar Mufti Fathonah Muvariz Muhammad Ismail Naufal A Prasetyo Nidia Yuniarsih Nisrina Afifah Novianti Nugroho Pratomo Ariyanto Nugroho Pratomo Aryanto Nur Fitria Pujo Leksonowati Nurman Pamungkas Nurul Ulfah Parlin Jhony Haposan Siagian Rafi Julio Putra Rivaldo Rimo Saiful Akhyar Lubis Sapto Wiratno Satoto Sembiring, Rinawati Sudaryo Sudaryo Sudaryo Sudaryo Sudirman Sudirman Sulistioso Giat Sukaryo Sulistioso Giat Sukaryo, Sulistioso Giat Tian Havwini Widodo Widodo Yogantara Yogantara