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All Journal Jurnal Pengabdian Kepada Masyarakat Sakai Sambayan Jurnal Mechanical International Journal of Aviation Science and Engineering
Zulhanif Zulhanif
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Transportation Other

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Pengaruh Variasi Temperatur Artificial Aging 150ᵒC, 170ᵒC dan 190ᵒC Terhadap Sifat Kekerasan dan Struktur Mikro Al-2024 Okta Rianda; Zulhanif Zulhanif; Harnowo Supriadi
JURNAL MECHANICAL Vol 13, No 1 (2022): Maret 2022
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/mech.v13.n1.202203

Abstract

The use of aluminum in the automotive industry has increased since 1980 and continues to increase in line with the increase in the number of motorized vehicles in Indonesia. Automotive components derived from aluminum alloys are required to have good strength. To have good strength, aluminum is usually combined with elements such as: Cu, Si, Mg, Zn, Mn, Ni, and so on. Aluminum-Copper Alloy (Al-Cu) is widely used in automotive components such as engine components that work at high temperatures, for example in the piston and cylinder head of the combustion motor. The mechanical properties of Al-Cu are needed and fulfilled in automotive components, therefore it is necessary to increase the mechanical properties of the Aluminum-Copper (Al-Cu) alloy. This research will be carried out using aluminum alloy Al-Cu with 2024 series which will receive heat treatment at a temperature of 4500C with quenching cooling method and then receive artificial aging treatment with temperature variations of 1500C, 1700C and 1900C. This research was conducted to determine the comparison of hardness and microstructure of aluminum before and before receiving artificial aging treatment. In this study, the results of the chemical composition test were obtained with the percentage of Al of 90.6% and the percentage of Cu being 5, 90%. The highest hardness value is found in Al-Cu material with artificial aging process with a temperature variation of 1900 C, the hardness value is 74.4 (HRB) which has an increase of 24% from the hardness value of the material without heat treatment. The results of the microstructure test showed that the Al-Cu material after the artificial aging process at a temperature of 1900C had more black grains and the Al-Cu grain boundaries tended to be more dense and regular. This can be interpreted that in materials that are treated with artificial aging there are precipitates or the formation of a second phase which causes the material to be harder and have better mechanical properties.Keywords: Alluminium Alloy, Artificial Aging, Hardness, Micro Structure
PELATIHAN PENGEKSTRAKAN SERAT TKKS KEPADA KELOMPOK TANI DESA ONOHARJO, KECAMATAN TERBANGGI BESAR, LAMPUNG TENGAH shirley savetlana; Sugiyanto Sugiyanto; Zulhanif Zulhanif; Nafrizal Nafrizal
Jurnal Pengabdian Kepada Masyarakat Sakai Sambayan Vol 7 No 1 (2023)
Publisher : Lembaga Penelitian dan Pengabdian Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jss.v7i1.408

Abstract

Usaha perkebunan sawit menyumbang 42% dari kebutuhan minyak nabati dunia. Sektor industri sawit memberikan sumbangan yang cukup besar kepada perekonomian Indonesia, melalui ekspor Crude Palm Oil (CPO) dan produk-produk turunannya dengan rata-rata sebesar 14,19% per tahun dari total ekspor non-migas Indonesia. Di Lampung sendiri luas perkebunan sawit menurut data tahun 2019 adalah seluas 109,24 ribu hektar. agroindustri sawit ini tentu saja menghasilkan limbah antara lain tandan kosong kelapa sawit yang cukup berlimpah. Desa Onoharjo terletak di Kecamatan Terbanggi Besar. Kabupaten Lampung tengah. Masyarakatnya merupakan petani antara lain berkebun sawit. Limbah tandan kosong kelapa sawit (TKKS) dihasilkan dari perkebunan kelapa sawit. Limbah ini sebenarnya merupakan sumber serat. Serat ini merupakan material yang ramah lingkungan. Pada kegiatan pengabdian ini akan dilakukan kegiatan workshop pengabdian yaitu mengenai teknologi pengekstrakan serat dari tandan kosong kelapa sawit menjadi serat kepada kelompok tani di Desa Onoharjo. Serat yang telah diekstrak ini nantinya akan dapat digunakan untuk membuat produk-produk yang bernilai ekonomis. Serat diekstrak manual dan akan diberikan perakuan kimia menggunakan sodium hidroksida dan selanjutnya dikeringkan didalam alat pemanas. Hasil pre test dan post test menunjukan adanya peningkatan pemahaman peserta terhadap pengambilan dan pengawetan serat tandan sawit.
Bird Detection System Design at The Airport Using Artificial Intelligence Khairul Ummah; Muhammad Fadly Hidayat; Denni Kurniawan; Zulhanif Zulhanif; Javensius Sembiring
AVIA Vol. 4, No. 2 (December 2022)
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47355/avia.v4i2.72

Abstract

Bird strike is a process of crashing between bird and airplane which occurs in flight phase. Based on data, there are 40 times bird strike occurs every day (FAA, 2019). There are lot of research that already conducted to decrease number of birds at the airport. But it is not given significant changes. Hence, it is needed a model that can detect bird at the airport so that we can decrease the number of birds. Study already conducted by comparing motion detection with object detection and filter which can be used to improve detection quality. Model already developed using YOLOv4 object detection with 71.89% mean average precision. It is expected that object detection can be developed to become a bird repellent system in the future
Co-Authors Denni Kurniawan Harnowo Supriadi Javensius Sembiring Khairul Ummah Muhammad Fadly Hidayat Nafrizal Nafrizal Okta Rianda Shirley Savetlana Sugiyanto Sugiyanto