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All Journal Rekayasa Mesin Media Informatika
Yudi Suryawan
Jurusan Teknik Mesin Fakultas Teknik Universitas Brawijaya
Computer Science & IT Mechanical Engineering

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Pengaruh Kuat Arus dan Waktu Pengelasan pada Proses Las Titik (Spot Welding) Terhadap Kekuatan Tarik dan Mikrostuktur Hasil Las dari Baja Fasa Ganda (Feritte-Martensite) Agustriyana, Lisa; Suryawan, Yudi; Sugiarto, Sugiarto
Jurnal Rekayasa Mesin Vol 2, No 3 (2011)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (224.835 KB)

Abstract

This research was conducted to investigate the appropiate spot welding variable to get the maximum tensile strength. The highest of tensile strength referred as good quality of weldment.The plate was made from low carbon steel with phase ferrite and martensite. The current of welding used 0.9 kA, 1.6 kA, dan 1.85 kA with welding time were 0.25, 0.5 , 0.75 and 1 second. Mechanical properties testing done involved tensile strength to know shear strength of weld joint. Microstructure test used optical microscope.The results show that spot welding with thecurrent of 1.85kA and welding time of 1 second has the highest tensile strength (about 237.04N/mm2). On the other hand, the lowest tensile strength (150 N/mm2) was produced by combination of 0.9 kA and 0.25 second welding time. It was caused by recrystallization phasedeformation on steel.Keywords: current, welding time, tensile strength, spot weld
Analisis Komparatif Etika Hacking: White Hat vs Black Hat Aliffiansyah, Arjuna Noor; Yasir, Alfian Miftakhul; Suryawan, Yudi; Lateef, Hylmi; Arfriandi, Arief
Media Informatika Vol 24 No 3 (2025)
Publisher : P3M STMIK LIKMI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37595/mediainfo.v24i3.467

Abstract

Penelitian ini menyajikan analisis komparatif mendalam mengenai white hat dan black hat hacker, mencakup aspek etika, motivasi, metodologi, dan implikasi hukum. Melalui metode studi literatur terhadap sumber-sumber ilmiah relevan, penelitian ini membedah dualisme dalam dunia peretasan. Hasil analisis menunjukkan perbedaan fundamental keduanya tidak terletak pada keahlian teknis, melainkan pada niat, legalitas, dan dampak tindakan, yang mengubah keahlian siber dari ancaman destruktif menjadi pelindung konstruktif bagi keamanan digital.
Co-Authors Aliffiansyah, Arjuna Noor Arfriandi, Arief Lateef, Hylmi Lisa Agustriyana Sugiarto S Yasir, Alfian Miftakhul