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All Journal Jurnal Teknologi Jurnal Dinamika Penelitian Industri JST ( Jurnal Sains Terapan ) JURNAL INTEGRASI Journal of Research and Technology INOVTEK POLBENG QARDHUL HASAN: MEDIA PENGABDIAN KEPADA MASYARAKAT Journal of Welding Technology Jurnal Teknologi dan Riset Terapan (JATRA) Jurnal Cakrawala Maritim Jurnal Cakrawala Maritim Jurnal Teknologi Maritim PROCEEDINGS CONFERENCE ON DESIGN AND MANUFACTURE AND ITS APPLICATION

Muhamad Ari

Politeknik Perkapalan Negeri Surabaya

Author-ID : 3913350

Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Mechanical Engineering Social Sciences Other

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ANALISIS SIFAT MEKANIK KOMPOSIT Al 2075 REINFORCEMENT DENGAN ELECTROLESS ABU DASAR BATUBARA Setiawan, Adhi; Nilasari, Arita Rochma; Ari, M.
Journal of Research and Technology Vol 2, No 2 (2016)
Publisher : Universitas Nahdlatul Ulama Sidoarjo

Aluminium composite 2075 manufacturing required a strenghthener such as bottom ash which has been through the electroless plating process that serves coating the bottom ash and sticks to aluminium casting process. The oxidation of 100oC produce 0,0126 µm Mg thickness oxidation, 200oC produce 0,0146 µm Mg thickness oxidation, and 300oC produces 0,0506 µm Mg thickness oxidation. Mechanical properties were tested by using worn-out test and hardness test based on new material function that will be used to replace existing disc brake material. Harness test showed that castings are using oxidized ash powder with higher temperature and produce resistant material than in low temperature. Casting mixture with oxidized bottom ash 100oC produce specific abrasion of 2,008 x 10-6 mm2/kg, produce of 1,814 x 10-6 mm2/kg for oxidized 200oC, and produce of 1,675 x 10-6 mm2/kg for oxidized 300oC.

KOROSI BAJA KARBON API 5L GRADE B SEBAGAI FLOWLINE PRODUKSI GAS ALAM Setiawan, Adhi; Fajrin, Alfinura; Munir, M. Miftahul; Ari, M.
Journal of Research and Technology Vol 4, No 1 (2018)
Publisher : Universitas Nahdlatul Ulama Sidoarjo

Corrosion that occurs in a gas flowline is a serious problem because it can cause leaks that lead to material loss and environmental pollution. The aims of this research were to analyze the corrosion occurred in gas flowline of carbon steel 5l Grade B and the effect of inhibitor TIC-8002 GCI to the corrosion rate of metal. This research was conducted using SEM-EDX to analyze and produce various types of metals and corrosion crust. Metals corrosion test and the effect of inhibitors on the corrosion rate of metals were carried out by linear polarization methods. The result of SEM-EDX showed that inner pipe surface occurred pitting corrosion caused by dissolved chloride ions in the electrolite that flows in the pipeline. The result of XRD showed that corrosion products of carbon steel were Fe2O3 and FeOOH. The result of linear polarization showed that the corrosion rate of steel about 0.642 mmy without using inhibitor. The addition of an inhibitor can reduce the corrosion rate in carbon steel. The increase in inhibitor concentration from 10 ppm to 50 ppm can reduce the corrosion rate from 0.633 mmy to 0.394 mmy along with an increase in inhibition efficiency from 1.32% to 38.6%.

Analisis Pengaruh Heat Treatment Terhadap Sifat Mekanik dan Ketahanan Korosi Intergranular SA-240 TP316L Adhi Setiawan; Puguh Pribadhi; Muhamad Ari
JST (Jurnal Sains Terapan) Vol 6, No 1 (2020): JST (Jurnal Sains Terapan)
Publisher : Pusat Penelitian dan Pengabdian kepada Masyarakat, Politeknik Negeri Balikpapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32487/jst.v6i1.803

Intergranular corrosion is a problem that often occurs in welding stainless steel materials. Intergranular corrosion is caused by carbide precipitation which occurs at a temperature of 850oC, causing a reduction in chromium content in the Heat Affected Zone (HAZ). The intergranular corrosion process can be controlled by the heat treatment method after the welding process. This study aims to study the effect of heat treatment on mechanical properties and intergranular corrosion resistance of SA240 TP316L material. The variation of heat treatment were divided into three solution treatment (ST), quenching treatment (QC), and non-treatment (NT). Mechanical properties testing using tensile test while corrosion resistance testing using linear polarization using H2SO4 0.1 M solution. Morphology and metal composition in the HAZ area were analyzed using SEM-EDX. Tensile test results showed that welding with solution treatment had the lowest yield strength, ultimate strength, and elongation values compared to specimens of 407.55 MPa, 599.33 MPa, and 44.53%. Corrosion test results found that welding with solution treatment has the lowest corrosion rate compared to specimens with quenching treatment (QC) and non treatment (NT). Corrosion rate in each ST, QC, and NT specimens was 0.90; 1.03; and 2.35 mmpy. The results showed that the solution treatment process can improve intergranular corrosion resistance. Keywords :stainless steel , intergranular corrosion , solution treatment. ABSTRAKKorosi intergranular merupakan permasalahan yang sering terjadi pada pengelasan material baja tahan karat.Korosi intergranular disebabkan oleh presipitasi karbida yang terjadi pada suhu sekitar 850oC sehingga menyebabkan berkurangnya kandungan krom di bagian Heat Affected Zone (HAZ). Proses korosi intergranular dapat dikendalikan dengan metode heat treatment setelah proses pengelasan. Penelitian ini bertujuan untuk mempelajari pengaruh heat treatment terhadap sifat mekanik dan ketahanan korosi intergranular material SA240 TP316L.Variasi heat treatment dibagi menjadi tiga yaitu solution treatment (ST), quenching treatment (QC), dan non treatment (NT). Pengujian sifat mekanik menggunakan tensile test sedangkan pengujian ketahanan korosi menggunakan polarisasi linear menggunakan larutan H2SO4 0,1 M. Morfologi dan komposisi logam pada daerah HAZ dianalisis menggunakan SEM-EDX. Hasil tensile test menunjukkan bahwa pengelasan dengan solution treatment memiliki nilai yield strength, ultimate strength, dan elongation terendah dibandingkan dengan spesimen yaitu 407,55MPa, 599,33MPa, dan 44,53%. Hasil uji korosi diketahui pengelasan dengan solution treatment memiliki laju korosi terendah dibandingkan dengan spesimen dengan quenching treatment (QC) dan non treatment (NT). Laju korosi pada masing-masing spesimen ST, QC, dan NT sebesar 0,90;1,03; dan 2,35 mmpy. Hasil penelitian menunjukkan bahwa proses solution treatment dapat memperbaiki ketahanan korosi intergranular.Kata kunci :baja tahan karat , korosi intergranular, solution treatment

The PERBANDINGAN HASIL ANALISIS METODE ELEMEN HINGGA BERBASIS SOFTWARE DENGAN SIMPLE SUPPORTED CALCULATION PADA KAPAL 50 PAX CRANE BARGE Meida Perwira Antartika; Budianto Budianto; Muhamad Ari; Ketut Suastika
JURNAL INTEGRASI Vol 12 No 1 (2020): Jurnal Integrasi - April 2020
Publisher : Politeknik Negeri Batam

Today the use of the Finite Element Method for the analysis of the strength of a structure is increasingly popular. The method of analysis is generally made easy by using software. In this study an advanced storage platform construction structure was analyzed on the 50 PAX Crane Barge vessel. The structure of this vessel uses BV grade A steel. Profile in this forward storage construction platform, the structure withstand loads is 6.4 tons (3.2 tons portside and 3.2 tons startboard). Load conditions are considered to be static, dynamic and impact conditions. The structure of the forward storage platform uses the 75x75x6 L angle bar profile as the main amplifier, each 1829 mm apart. This main amplifier is connected directly to the plate, and functions as the main buffer of the load to be given. The results of the analysis using software in the form of von Mises stress, normal stress, and principal stress. As a verification, manual calculation is done using the Simple Supported Calculation method. In this study comparing von Mises stress, normal stress, and principal stress results of the Finite Element Method with stress results of Simple Supported Calculation. Keyword : Finite Element Method, Barge, Simple Stress Calculation

Analisis Temperatur PWHT dan Holding Time pada Sambungan Las Material SA 387 Grade 11 Class 1 Terhadap Nilai Kekerasan dan Struktur Mikro Muhamad Ari
INOVTEK POLBENG Vol 9, No 2 (2019): INOVTEK VOL.9 NO 2 - 2019
Publisher : POLITEKNIK NEGERI BENGKALIS

Material SA 387 Grade 11 Class 1 tergolong material 1.25Cr-0,5Mo sangat sensitif terhadap hydrogen cracking serta nilai kekerasan yang tinggi setelah dilakukan proses pengelasan. Untuk meminimalkan kemungkinan terjadinya hydrogen cracking pada Heat Affected Zone (HAZ) dan nilai kekerasan yang tinggi maka direkomendasikan untuk dilakukan preheat dan post weld heat treatment (PWHT). Pada penelitian ini PWHT dilakukan dengan variabel temperatur dan holding time pada masing-masing spesimen, yaitu 590°C, 620°C, dan 650°C dengan holding time 30 dan 60 menit. Pemanasan dan pendinginan dilakukan di dalam automatic muffle furnace. Hasil pengujian struktur mikro menunjukkan bahwa perbedaan temperatur dan holding time dapat mempengaruhi struktur mikro. Pada uji struktur mikro diketahui bahwa semakin tinggi temperatur dan semakin lama holding time mengakibatkan dominasi fasa bainit semakin berkurang. Hasil uji kekerasan tertinggi terletak pada temperatur dan holding time terendah, yaitu 590ºC dan holding time 30 menit dengan nilai kekerasan 153,08 HVN pada base metal, 215,23 HVN pada HAZ, serta 239,28 HVN pada weld metal. Nilai kekerasan terendah didapatkan pada temperatur dan holding time tertinggi, yaitu 650ºC dan holding time 60 menit dengan nilai kekerasan 138,71HVN pada base metal, 173,65 HVN pada HAZ, serta 215,52 HVN pada weld metal.

Hot tapping process analysis on gas distribution pipes online service using Shielded Metal Arc Welding Budi Prasojo; Yunan Sadli Nasution; Endah Wismawati; Subagio So’im; M. Ari
Journal of Welding Technology Vol 4, No 1 (2022): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v4i1.2953

In a piping system makes it possible to add branching into an existing piping system. In this research will discuss about installation 12 " branch pipe in to 16” existing pipe. The system should be installed without interrupting the operation of the pipeline to avoid huge losses. Hot-tapping is a technology that works to create branching on the online service pipe condition. Calculation and analysis of the results to ensure the process of hot-tapping absolutely safe to operate. parameters that must be considered include the heat input, the operating pressure during welding hot-tapping process with Shielded Metal Arc Welding, stress that occurs at the branching system. Analysis on split tees must be done because of stress that occurs due to the welding process and the reduction in thickness. Analysis on the plumbing system must be done because of a new branching thus causing new stress. The results of the analysis on split tees and the pipe system is used as a reference-making procedures for implementing hot-tapping. Maximum stress that occurs in the pipes during hot-tapping process is the welding area (22.828 psi). The welding process causes melting partial in the metal pipe so, during welding process (hot-tapping) working pressure should be reduced by 25.27%. The condition of the fluid in the existing pipeline still safe because liquefaction as a result of the welding process does not penetrate to the inner pipe. The new design results in branch pipe eligible to fabricated because stress that occurs is still below the allowable stress values

Analisis variasi arus pengelasan Submerged Arc Welding pada proses build-up beam material SM490YA terhadap perubahan distorsi menggunakan metode eksperimen dan numerik Rega Kurniawan; Muhamad Ari; Dika Anggara
Journal of Welding Technology Vol 3, No 2 (2021): December
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v3i2.2507

Proses Pengelasan SAW (Submerged Arc Welding) dengan arus besar secara kontinyu mengakibatkan panas yang masuk juga secara kontinyu pada satu titik. Hal ini mengakibatkan ekspansi yang signifikan jika terkena panas dan penyusutan jika mengalami pendinginan dan distorsi pada material. Pada penelitian ini, eksperimen dilakukan dengan variasi arus las. Pemodelan numerik struktural – termal dilakukan dengan software berbasis elemen hingga, dengan menggunakan data dari eksperimen sebagai validasi. Distrosi yang terjadi pada eksperimen dan pemodelan mendapatkan hasil yang mendekati. Distorsi sudut yang paling minimum pada eksperimen pengelasan SAW Single 450A sebesar 1,0˚ dan 1,2˚, sedangkan pada pemodelan numerik sebesar 1,15 ˚.

Desain tangki timbun external floating roof kapasitas 75000 MT Kevin Satria Nugraha; Muhamad Ari; Mochammad Al Amin Karim Al Amin
Journal of Welding Technology Vol 2, No 2 (2020): Desember
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v2i2.2063

Storage tanks are widely used in industry, especially as a storage area for oil and gas mining products. Various types of storage tanks are made based on the pressure, the type of fluid stored and the type of roof used. The roof on the storage tank is divided into a fixed roof, internal floating roof and external floating roof. Floating roof is used as a barrier between the fluid and the empty space in the tank so as to minimize the occurrence of vapor space and the possibility of a fire in the tank. This study discusses the design of an external floating roof storage tank for condensate fluid with a capacity of 75000 metric tons. The design process for the shell course and other parts of the stockpile tank is based on the API 650 standard 12 addendum 2018 edition using the variable design point method. Verification of the results of calculations generated manually is done with finite element software. Manual calculations for the construction of an external floating roof heap tank get the minimum shell plate thickness used is 10 mm. The bottom plate was found to be 8 mm thick. The simulation using finite element software produces the maximum stress values on the shell, shell to bottom, and roof, namely 1.937 MPa, 7,122 MPa, 0.216 MPa, respectively. All stresses that occur are still below the allowable stress of the material. So it can be concluded that the tank construction is still safe

Analysis Of Forward Storage Platform In 50 Pax Crane Barge With An Finite Element Method Meida Perwira Antartika; Budianto Budianto; Muhamad Ari
Jurnal Teknologi dan Riset Terapan (JATRA) Vol 2 No 1 (2020): Jurnal Teknologi dan Riset Terapan (JATRA) - June 2020
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jatra.v2i1.1399

Hull construction must comply with the rules or classifications that have been recognized in the world of international shipping, in designing a storage platform designed by PT. X is designed for partners based reference, as a rule forms the design and calculations no rules. As for the mechanical properties of the material provisions remain in rules. Rules are used for shipbuilding 50 P.A.X crane barge is that BV (Bureau Veritas) rules. The analysis in this study using the finite element method-based software. With the software will be able to look forward strength and simulation constructs storage platforms that will support the weight of 6,4 tons (3,2 tons on portside and 3,2 tons on start board) in a static condition, dynamic, and impact. It aims to anticipate the possibility of the construction design error forward storage platform that could lead to an accident on the ship. Construction material storage platform forward using BV grade A steel.

Sintesis dan Karakterisasi Biodiesel Dari Limbah Scum Susu Menggunakan Katalis Heterogen Cao Dari Cangkang Telur Adhi Setiawan; Rizki Noviana Damayanti; Novi Eka Mayangsari; Muhamad Ari
Jurnal Dinamika Penelitian Industri Vol 33, No 1 (2022): JURNAL DINAMIKA PENELITIAN INDUSTRI
Publisher : Balai Riset dan Standardisasi Industri Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28959/jdpi.v33i1.7288

Limbah scum susu dapat dimanfaatkan sebagai bahan baku dalam produksi biodiesel karena mengandung trigliserida. Penelitian ini bertujuan untuk sintesis dan karakterisasi biodiesel dari limbah scum menggunakan katalis CaO dari cangkang telur, menganalisis pengaruh konsentrasi katalis serta rasio molar metanol dengan limbah scum terhadap karakteristik biodiesel. Pembuatan katalis CaO dilakukan dengan kalsinasi cangkang telur pada suhu 900oC selama 4 jam. Karakterisasi katalis CaO menggunakan SEM-EDX, XRD, FTIR, dan BET. Biodiesel diproduksi dengan proses transesterifikasi menggunakan katalis CaO pada suhu 63°C selama 1,5 jam. Produksi biodiesel menggunakan variasi perbandingan rasio molar metanol dengan limbah (6:1 dan 9:1) dan variasi konsentrasi katalis CaO (1,5% dan 2% ) pada suhu 63°C selama 1,5 jam. Hasil karakterisasi katalis menunjukkan bahwa morfologi cangkang telur setelah proses kalsinasi mengalami aglomerasi. Luas permukaan spesifik katalis yang dihasilkan sebesar 127 m2/g dengan ukuran pori sebesar 1,78 nm. Produk biodiesel tertinggi dihasilkan pada sampel dengan perbandingan konsentrasi metanol dengan limbah scum 9:1 dan katalis CaO sebanyak 2% dengan yield sebesar 83,15%. Yield biodiesel meningkat seiring dengan meningkatnya peningkatan rasio molar metanol dengan limbah dan konsentrasi katalis CaO. Karakteristik biodiesel yang dihasilkan dari variasi rasio molar metanol terhadap limbah serta variasi konsentrasi katalis telah memenuhi standar pada parameter massa jenis, titik nyala, dan angka asam.

Co-Authors Adhi Setiawan Alaek Nuâ€™man Alfidani Dwi Maharani Alfinura Fajrin Alfriansyah Aditya Alivia Nur Fadhila Amar Sastra Adi Anda Iviana Juniani Andiana, Rocky Augustino, Immanuel Freddy Bachtiar Budi Prasojo Budi, Hendri Budi Kurniyanto Budianto Budianto Budianto Budianto Chelvin Sugiarto Dhika Aditya Purnomo Dika Anggara Edy Prasetyo Hidayat Edy Setiawan Endah Wismawati Eriek Wahyu Restu Widodo Erlina Kusumawati Faiz Hamzah, Faiz Fajar Astuti Hermawati Fajrin, Alfinura Fipka Bisono Galih Anindita Habibi, Tsaaqif Haani Hakim, Achmad Reyhan Fajar Haruri, Rikko Harli Hendri Budi K I Made Kastiawan I. K. Suastika Ilham Kurniawan Imam Khoirul Rohmat Indri Santiasih Isworo, Annas Dwi Kevin Satria Nugraha Kusminah, Imah Luluk Lukman Handoko M. Miftahul Munir M. Thoriq Wahyudi Meida Perwira Antartika Meida Perwira Antartika Mochammad Karim Al Amin Moh. Miftachul Munir Moh. Syaiful Amri Mohammad Thoriq Wahyudi Muhammad Affandi Muhammad Saka Hafshah Mukhlis Mukhlis Mukhlis Munir, M. Miftahul Munir, Moh. Miftachul Nilasari, Arita Rochma Novi Eka Mayangsari Nur Azizah Pranowo Sidi Prastyawan, Rikat Eka Puguh Pribadhi Rega Kurniawan Rizha Agustian Dwi Susanto Rizki Noviana Damayanti Rohman, Muhammad Yuqal Abi Ruddianto Ruddianto . Sa'diyah, Rahmatus Subagio So’im Totok Yulianto Vinky Try Octavia Wahyudi, Mohammad Thoriq Wibowo, Alvalo Toto Wiediartini Wiediartini Yuansa Septianto Yudi Andika Yunan Sadli Nasution

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