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All Journal INTEKNA JURNAL PENDIDIKAN TAMBUSAI Jurnal Riset Akuntansi Aksioma Jurnal Teknologi Kedirgantaraan (JTK) Bahtera Indonesia; Jurnal Penelitian Bahasa dan Sastra Indonesia Buana Ilmu Jurnal Elkolind : Jurnal Elektronika dan Otomasi Industri JKKI : Jurnal Kedokteran dan Kesehatan Indonesia Jurnal Lingkungan Binaan Indonesia Journal of Law, Poliitic and Humanities Jurnal Buana Pengabdian West Science Business and Management JAKBS MULTIPLE: Journal of Global and Multidisciplinary Jurnal Sains Student Research Al-Kharaj: Jurnal Ekonomi, Keuangan & Bisnis Syariah El-Mal: Jurnal Kajian Ekonomi & Bisnis Islam Indonesian Journal of Integrated Science and Learning LEX LAGUENS: Jurnal Kajian Hukum dan Keadilan Journal Of Chemical Process Engineering PENG: Jurnal Ekonomi dan Manajemen Jurnal Bakti Dirgantara Journal of Ekonomics, Finance, and Management Studies
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Journal : Jurnal Teknologi Kedirgantaraan (JTK)

 1 
Analisis Radiografi Sinar-X Terhadap Sambungan Pelat Baja Tahan Karat Aisi 304 Hasil Pengelasan Tungsten Inert Gas Dengan Arus 40–60 Ampere ahmad zayadi; Sungkono; Cahyono HP
Jurnal Teknologi Kedirgantaraan Vol 6 No 2 (2021): Jurnal Teknologi Kedirgantaraan
Publisher : FTK UNSURYA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (991.343 KB) | DOI: 10.35894/jtk.v6i2.29

Abstract

X-Ray Radiographic Analysis of Aisi 304 Stainless Steel Plate Joints From Inert Gas Tungsten Welding Results with 40 – 60 Ampere Current. Metal welding process is one of the main processes in machine construction. The quality of welded joints determines the strength and toughness of a machine construction. The quality of welded joints of installed construction can be determined by the non-destructive test method using X-ray radiography equipment. This study aims to obtain a butt joint obtained from TIG welding of AISI 304 stainless steel plate with a current of 40 - 60 A, identification of defects in the 1G butt joint, and analysis of the quality of the weld joint. The research method used is testing of welded joints using X-ray radiography which refers to the ASME V article II standard and the connection quality refers to ASME section IX. The results showed that TIG welding with a current of 60 Ampere produced a butt joint butt joint that was penetrated and there was no gap between the plates, whereas with a current of 40 A and 50 A the weld joint was not see-through but there was still a gap between the plates. Incomplete penetration weld defects were found in the welded SS 304 plate joints with a current of 40 A. Welded porosity defects were found in the welded SS 304 plate joints with a current of 50 A. Weld defects were not found in the SS 304 plate joints with a current of 60 A. Butt joint connections TIG welded SS 304 plate with the best current of 60 A compared to the current of 40 A and 50 A.
Pengaruh Waktu Tempering terhadap Karakter Baja s45c Pasca Quenching pada 950oc dan Tempering 500 C Ahmad Zayadi; Sungkono; Masyhudi; Ekky Setyawan T
Jurnal Teknologi Kedirgantaraan Vol 7 No 1 (2022): Jurnal Teknologi Kedirgantaraan
Publisher : FTK UNSURYA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35894/jtk.v7i1.53

Abstract

Baja merupakan salah satu bahan struktur yang berfungsi sebagai wadah secara fisik, memberikan kekuatan mekanik, dan struktur penyangga untuk berbagai komponen industri nuklir, bahan tersebut membutuhkan sifat mekanik yang tinggi. Baja S45C memiliki kekuatan mekanik yang sedang sehingga dapat ditingkatkan sifat mekaniknya dengan perlakuan panas. Penelitian ini mempunyai tujuan untuk mendapatkan karakter mekanik, mikrostruktur, kekerasan, dan komposisi kimia pada Baja S45C. Metode yang digunakan adalah komposisi kimia dengan spark spectrometer, pengujian Tarik menggunakan mesin uji Tarik 50 KN, pengamatan mikrostruktur menggunakan mikroskop optik, dan kekerasan dengan vickers microhardness tester. Hasil penelitian menunjukkan bahwa komposisi kimia sampel pengujian adalah baja S45C, kekuatan tarik baja S45C yang menggunakan sampel tarik pasca perlakuan panas austenisasi, quenching media oli dan tempering 500 OC waktu penahanan 60 menit pendinginan suhu tungku lebih tinggi UTS (Ultimate tensile strength) dengan nilai UTS 805,12 (N/mm2), kekuatan luluh (Y)= 619,14 (N/mm2), dan regangan (e) = 15,00 %. dibandingkan sampel tanpa perlakuan panas dengan nilai (UTS) = 331,9 (N/mm2), kekuatan luluh (Y) = 267,27 (N/mm2) , dan regangan (e) = 20,08 %. Regangan baja S45C sampel tarik standar dan silinder pasca perlakuan panas lebih rendah dibandingkan sampel tanpa perlakuan panas. Mikrostruktur baja S45C tanpa perlakuan panas mempunyai fasa ferit dan perlit, sedangkan pasca quenching dan tempering adalah fasa martemper dan ferit. Semakin lama waktu penahanan pada proses tempering baja S45C, maka akan semakin rendah nilai kekerasan yang didapat. Proses perlakuan panas yang diterapkan pada sampel tarik baja S45C akan meningkatkan ketangguhan baja S45C yang ditandai dengan kenaikan kekuatan tarik dan keuletannya. Kekerasan logam dasar lebih rendah dibandingkan pada daerah patahan yang disebabkan adanya fenomena pengerasan regangan di daerah patahan selama uji tarik berlangsung.
Analisis Kerusakan Kepala Silinder Blok Mesin Pada Kendaraan Jenis Minibus Kapasitas 1500 CC Ahmad Zayadi; Sungkono; Masyhudi
Jurnal Teknologi Kedirgantaraan Vol 8 No 2 (2023): Jurnal Teknologi Kedirgantaraan
Publisher : FTK UNSURYA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35894/jtk.v8i2.79

Abstract

Four-wheeled vehicles are one of the commonly used modes of transportation. The vehicle engine has a cylinder head to place the valves and cooling mantle. Damage to the cylinder head will disrupt the engine's working system for a long time. The damaged  will take a long time for the repair process. The cylinder head is usually damaged at a milage of 80,000 km. The damage experienced by the cylinder head is the emergence of a rough sound in the engine, the mixing of cooling water into the combustion chamber and the temperature rises quickly, in this study a study will be conducted on the damage that occurs to the cylinder head. Based on the results of macrostructure testing, corrosion occurs due to engine cooling fluid, besides that there is a deposit that is very strong and corrosive to the cylinder head on the engine block, microstructure testing shows the presence of (black) deposits which are thought to affect the corrosion process, dendrite grains and rods in the microstructure do not change grain size. Based on the hardness test results show the hardness value of the damaged surface of 102.22 HV and the hardness value of the undamaged surface of 102 HV based on the damage to the engine block cylinder head is not caused by material deformation due to mechanical and thermal loads. The results of the chemical composition test of the cylinder head that was damaged decreased Al 1.1%, Si 0.11%, Cu 0.37, Fe 0.088% and Mg 0.081% and the decrease in the chemical composition of the constituent elements of the material was caused by the interaction of water with the surface of the cylinder head which was characterized by the formation of oxides of Al, Si, Cu, Fe, and Mg. Based on the test results, cylinder head damage is more due to lack of maintenance of the engine block.
Co-Authors Aam Sumiati Abizachryan Akbar Adam, Muhamad Aditya Nugraha, Ridha Agus Sugiharto Ahiruddin Ahmad Malik Fajar Ahmad Zayadi ahmad zayadi Aji Tuhagana Alfanny Amelia Ramadanti Andi Pawennari Anindya Dwi Risdhayanti Arie Rahmadi Arief Rahman Hidayat Arrad Amara Arziel Pramudya Asaibe Dorlima Simatupang Asih Riyanti, Asih Aulia Febriyanti AYU WANDIRA BASUKI ARIANTO Bawa, Ngakan Nyoman Rai Benny Gunawan Bryantono, Achmad Arif Cahyono HP Daniel Happy Putra DARMAWAN YULIANTO Dedeh Sartika Dedi Mulyadi Dedi Mulyadi Dendy Barqah Depi Prihamdani Desi Nurmala Dessy Wardiah, Dessy Deyani Faidah Dhea Amelia Putri Dhelzahra Yashinta Diktia Nurfadilah Dinar Reira Pelangi Edi Sulistio Budi Eka Mandayatma Ekky Setyawan T Elly Nurachmah Endah Yuniarti, Endah ERWIN WIJAYANTO Fadia Nanda Luthfiana Fadillah Siva Azzahra Fajar Ahmad Prasetyo1 Farida Aulia Fitri Gillang Al Azhar Harapan, Edi Hari Kurnia Safitri Hari Moekti Wibowo HARI MOEKTIWIBOWO Hidayat, Arief Rahman Hikmah Fauziyah I Made Laut Mertha Jaya Indramawan INDRAMAWAN INDRAMAWAN Jamal Handitia Putra Jodi Dwi Lesmana Juhana Kamajaya, Leonardo M A Bintoro Dibyoseputro M. A. Bintoro Dibyoseputro Maman Mulya Karnama Mandasini Masyhudi Meiliana Halim Muhammad Azhar Mukjizah Dwi Prihartina Muklis Al Amin Nabila Nur Hayati Fadhilah Nadia Septiani Nashrah Natalya Puspawangi Nurhanifah Nazwa Nur Fadhila Netti Nurlenawati Nur Agustin, Selvy Nurrisma Rahayu Nurwijayanti Nurwijayanti Kusumaningrum Putra, Jamal Handitia Putri Dwi Rahayu Rany Sitara Dewi Reza Amalia Putri Rifa Maulana Rindi Apridianti Rini Nurhasanah Sujana Sabrina Shela Fatimah Zahra Sarah Adzkia Aulia Sembiring, Rinawati Sheva Prasetyo Budi Rahayu Shirley Anggita Rahayu Sidik Nurcahyo suryawan, ryan firdiansyah Syifa Edenia Tedi Luay Tuti Herawati W.TEDJA BHIRAWA Wahyu Tri Wahono Winarno, Totok Yosiana Kristiani Tambun Yulia Nur Fadilah