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All Journal Jurnal Simetris Prosiding SNATIF Jurnal Sains dan Teknologi Jurnal Universal Technic Ocean Engineering: Jurnal Ilmu Teknik dan Teknologi Maritim Mitra Abdimas: Jurnal Pengabdian kepada Masyarakat
Lilin Hermawati
Universitas Muria Kudus
Aerospace Engineering Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Social Sciences Transportation

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PENGARUH TiB TERHADAP KEKERASAN KOMPOSIT AlSiMg YANG DIPERKUAT SERBUK SiC Hermawati, Lilin; -, Sulardjaka; Nugroho, Sri
Prosiding SNATIF Vol 1, No 1 (2014): Prosiding Seminar Nasional Teknologi dan Informatika
Publisher : Prosiding SNATIF

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Abstrak Aluminium merupakan salah satu logam yang banyak digunakan dalam industry.Aluminium memiliki sifat ringan, tahan terhadap korosi dan mudah dibentuk. Namun  aluminium memiliki kekerasan yang rendah. Metode Metal Matrix Composite (MMC) merupakan  salah satu metode yang digunakan untuk meningkatkan sifat mekanik suatu logam.   SiC  merupakan bahan yang banyak dipergunakan sebagai penguat.  SiC memiliki kelebihan disbanding  material keramik lainnya, yaitu mudah berikatan dengan aluminium dan tidak menyebabkan oksidasi pada logam aluminium. Penelitian ini meneliti pengaruh  persen berat TiB 0,5%, 1%, 1,5% dan aluminium yang diperkuat SiC 5%. Untuk mengetahui sifat fisis dan mekanis pada komposit AlSiMg-TiB-SiC dilakukan beberapa pengujian, yaitu uji densitas, porositas, kekerasan dan struktur mikro. Perhitungan porositas menunjukkan nilai porositas tertinggi terdapat pada persen berat SiC 0,5% sebesar 4,97%. Hasil uji kekerasan tertinggi pada persen berat SiC 1,5% sebesar 78.39 HRB Hasil pengujian menunjukkan bahwa sifat mekanis meningkat seiring dengan peningkatan persentase serbuk TiB sampai 1,5% Kata Kunci : Metal Matrix Composite, Pengadukan semisolid, Stir Casting, Wetabilitty
KOMPOSIT Al7Si–SiC DENGAN PERTAMBAHAN TiB MEMPENGARUHI STRUKTUR MIKRO Hermawati, Lilin; Mujiarto, Iman; Yanuar, Padang
Simetris: Jurnal Teknik Mesin, Elektro dan Ilmu Komputer Vol 10, No 1 (2019): JURNAL SIMETRIS VOLUME 10 NO 1 TAHUN 2019
Publisher : Universitas Muria Kudus

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (495.358 KB) | DOI: 10.24176/simet.v10i1.2768

Abstract

Metal Matrix Composite Method (MMC) menjadi bahan pertimbangan setiap peneliti dalam melakukan pengecoran. Atau sering disebut dengan pencampuran matrik paduan dan matrik murni untuk menghasilkan bahan campuran yang lebih baik. Sifat aluminium yang ringan, tahan terhadap korosi serta mudah dibentuk, aluminium banyak dipergunakan untuk beberapa penelitian dan produksi, namun dari beberapa proses pengecoran banyak sekali kendala untuk pencampuran matrik Al dan beberapa matrik lainnya. Maka dalam penelitian ini penulis mencoba dengan Proses Stir Casting agar mendapat hasil yang homogen dalam pencampuran SiC dengan komposit Al7Si dengan diberi serbuk SiC dengan penambahan 5%, 7,5% dan 10% sebagai penguat. Serbuk SiC mempunyai sifat yang tidak homogen dengan permukaan SiC yang tidak bisa membasahi oleh matrik cair. Selain SiC sebagai penguat pada penelitian ini juga menambahkan TiB 1% yang berfungsi penghalus butir. Dari penelitian ini penulis melakukan beberapa pengujian untuk mengetahui hasil dari pencampuran matrik yang ada. Pengujian yang dilakukan stru ktur mikro, densitas, kekerasan dan potensial.
Penanaman Bibit Mangrove Guna Mengurangi Dampak Lingkungan di Pantai Tirang Semarang Kundori; Hermawati, Lilin; Mujiarto, Iman; Mahendro, Iwan
Mitra Abdimas: Jurnal Pengabdian kepada Masyarakat Vol 2 No 2 (2022)
Publisher : Medan Resource Center

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (545.988 KB) | DOI: 10.57251/mabdimas.v2i2.772

Abstract

This community service activity aims to plant mangrove tree seedlings that are expected to be used as pollutant absorbers and prevent seawater abrasion, educational facilities, carbon storage, and coastal tourism. The method used is by conducting lectures and direct practice by planting mangrove tree seedlings. This service activity is carried out in several stages including observation, coordination, execution, and evaluation. Observations were made by coming to Tirang Beach to determine the location for planting mangrove seedlings. tirang beach was chosen due to beach abrasion due to rising seawater and abrasion. The coordination stage is carried out by the community service team together with the Tirang beach manager. The aim is to coordinate so that community service activities can run smoothly and on target. The execution was carried out by planting mangrove tree seedlings on the beach, especially those affected by abrasion. While the evaluation is by looking at the deficiencies that were carried out during community service activities. The activity of planting mangrove trees is beneficial for increasing public awareness of environmental concerns by planting trees and for reducing greenhouse gas emissions so as to reduce impact global warming.
Analisa Quenching Air Dan Oli Terhadap Terhadap Nilai Kekerasan Permukaan Baja Karbon Rendah Hardfacing Menggunakan Las Smaw Dengan Polaritas DC- Dan DC+ Hermawati, Lilin; Pratomo, Sunu Arsy; Budiyanto, Lilik
Jurnal Universal Technic Vol. 3 No. 1 (2024): April : Jurnal Universal Technic
Publisher : Fakultas Teknik Universitas Maritim AMNI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58192/unitech.v3i1.1880

Abstract

When welding, you don't have to connect two metal materials, you can also weld the thickness of the component. Steel is a metal material that can be used in the engineering field to make alloys of other metals so that they can have better material properties than the original metal material. One thing that can be done to increase resistance to wear is to increase the surface hardness of the workpiece. This research carried out an analysis to increase the hardness of the surface of low carbon steel after heat treatment for 60 minutes with variations in quenching media resulting from hardfacing using SMAW welding (shield metal arc welding) with DC+ and DC- polarities. The data analysis technique used in this research is specimen testing. The results obtained later by the research show that DC+ polarity has higher hardness in all specimens tested with a value of 418.66 VHN water quenching, 402.8 VHN oil quenching, 348 VHN non-treatment when compared with DC- polarity with a value of 405, 92 VHN quenching water, 374.02 VHN quenching oil and 323.38 VHN non-treatment. Quenching media with water obtained the highest hardness results with a value of 405.92 VHN.
PENGARUH PERTAMBAHAN TIB PADA KOMPOSIT AL7SI–SIC TERHADAP STRUKTUR MIKRO Hermawati, Lilin; Mujiarto, Iman; Yanuar, Padang
Simetris: Jurnal Teknik Mesin, Elektro dan Ilmu Komputer Vol 10, No 1 (2019): JURNAL SIMETRIS VOLUME 10 NO 1 TAHUN 2019
Publisher : Fakultas Teknik Universitas Muria Kudus

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (495.358 KB) | DOI: 10.24176/simet.v10i1.2768

Abstract

Metal Matrix Composite Method (MMC) menjadi bahan pertimbangan setiap peneliti dalam melakukan pengecoran. Atau sering disebut dengan pencampuran matrik paduan dan matrik murni untuk menghasilkan bahan campuran yang lebih baik. Sifat aluminium yang ringan, tahan terhadap korosi serta mudah dibentuk, aluminium banyak dipergunakan untuk beberapa penelitian dan produksi, namun dari beberapa proses pengecoran banyak sekali kendala untuk pencampuran matrik Al dan beberapa matrik lainnya. Maka dalam penelitian ini penulis mencoba dengan Proses Stir Casting agar mendapat hasil yang homogen dalam pencampuran SiC dengan komposit Al7Si dengan diberi serbuk SiC dengan penambahan 5%, 7,5% dan 10% sebagai penguat. Serbuk SiC mempunyai sifat yang tidak homogen dengan permukaan SiC yang tidak bisa membasahi oleh matrik cair. Selain SiC sebagai penguat pada penelitian ini juga menambahkan TiB 1% yang berfungsi penghalus butir. Dari penelitian ini penulis melakukan beberapa pengujian untuk mengetahui hasil dari pencampuran matrik yang ada. Pengujian yang dilakukan stru ktur mikro, densitas, kekerasan dan potensial.
Analisa Kegagalan Material Kepala Silinder Mesin Diesel 4 TAK Hermawati, Lilin; Mujiarto, Iman; Pratomo, Sunu Arsy; Kundori, Kundori
Jurnal Sains dan Teknologi (JSIT) Vol. 1 No. 2 (2021): Jurnal Sains dan Teknologi (JSIT)
Publisher : CV. Information Technology Training Center - Indonesia (ITTC)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47233/jsit.v1i2.105

Abstract

cylinder head is a part that is exposed to thermal and mechanical loads which not only affect engine performance parameters. The purpose of this study is to analyze the failure of the cylinder head structure of a 4 stroke diesel engine and find the cause of the failure. In this study, surveys and measurements of the cylinder head were carried out, to find out the appropriate results so that they could determine cracks, wear, and warping of the cylinder head. The results showed that the maximum bend on the side of the cylinder head attached to the cylinder block was 0.07 mm, 0.08 mm, 0.069mm. While the maximum bending on the side of the cylinder head attached to the manifold is 0.15 mm, 0.14 mm, 0.16 mm. At maximum bending on the side of the cylinder head attached to the exhaust manifold, it is necessary to pay attention to how to use the diesel engine correctly and according to operating hours.
Analisa Sistem Manajemen Perawatan Pompa Roda Gigi Di Kapal KM. Kelimutu Haryadi, Sugeng; Hermawati, Lilin; Pratomo, Sunu Arsy
Ocean Engineering : Jurnal Ilmu Teknik dan Teknologi Maritim Vol. 2 No. 2 (2023): Juni : Jurnal Ilmu Teknik dan Teknologi Maritim
Publisher : Fakultas Teknik Universitas Maritim AMNI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58192/ocean.v2i2.1111

Abstract

This study focuses on the management of gear pump maintenance on KM Kelimutu ship. Data collection methods are used to identify and investigate the causes of damage that occur in the gear pump. The required maintenance and repair actions are determined based on the analysis results. The process of managing maintenance involves several important steps. First, planning is carried out to determine the planned maintenance actions. Subsequently, organization is conducted by appointing responsible personnel and coordinating with relevant parties to minimize disruptions to the maintenance of equipment and other machinery on the ship. Furthermore, actuating involves efforts to ensure that all human resources work according to their tasks, functions, and competencies in order to achieve company goals. Finally, control is implemented through supervision of each job performed to identify and rectify any potential errors. The results of this study provide insights into the importance of gear pump maintenance and effective strategies in managing the maintenance process. By implementing the appropriate steps, it is expected to enhance the performance of the gear pump, extend its service life, and optimize operational efficiency in the industry.
Co-Authors budiyanto, Lilik Kundori Mahendro, Iwan Padang Yanuar Pratomo, Sunu Arsy Sri Nugroho Sugeng Haryadi, Sugeng Sulardjaka -