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All Journal Jurnal Teknik Mesin SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Jurnal IPTEK Jurnal Ilmiah Teknik Mesin Jurnal Teknik Mesin Jurnal Rekayasa Material, Manufaktur & Energi AL-JAZARI JURNAL ILMIAH TEKNIK MESIN JPP IPTEK (Jurnal Pengabdian dan Penerapan IPTEK) Prosiding Seminar Nasional Sains dan Teknologi Terapan Jurnal Teknik Mesin Indonesia Specta Journal of Technology Journal of Applied Sciences, Management and Engineering Technology (JASMET) Jurnal Teknik Mesin Journal of Mechanical Engineering, Science, and Innovation Journal of Mechanical and Electrical Technology Prosiding Seminar Nasional Teknologi Industri Berkelanjutan Journal of Science and Social Development
Afira Ainur Rosidah
Institut Teknologi Adhi Tama Surabaya
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 Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Other

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The effect of time variation on the steels corrosion rate in 0.5 M H2SO4 solution Afira Ainur Rosidah; Vuri Ayu Setyowati; Suheni Suheni; Rafly Rijayanto
Journal of Mechanical Engineering, Science, and Innovation Vol 1, No 2 (2021): (October)
Publisher : Mechanical Engineering Department - Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (626.358 KB) | DOI: 10.31284/j.jmesi.2021.v1i2.2183

Abstract

Previous researches have carried out studying the corrosion behavior of steels, the most frequently used steels are medium carbon steel, alloy steel, and stainless steel. This is due to their wide range of applications. So, corrosion behavior is necessary to be analyzed for every steel type because of its wide function. This study was aimed to analyze the corrosion rate, macrostructure, and the XRD results of the AISI 1045, AISI 4140, and SS 304 which represent every steel type. Then, the steels were exposed to the 0.5M H2SO4 solution with various corrosion times. The variation of the corrosion time was 48, 96, and 144 hours. The results of this study revealed that AISI 1045 showed the highest corrosion rate with the value of 183.7 mpy at 144 hours of the time variation. All specimens obtained an increase in the corrosion rate with the increase in the corrosion time. Furthermore, for the macrostructure results, AISI 1045 and AISI 4140 gave obvious rust on the surface of the specimens for all time variation. The corrosion spots appear in the time variation of 96 and 144 hours for SS 304 specimens. XRD analysis confirmed the presence of metal oxides as corrosion products.
The Mechanical Properties and Microstructure Analysis of Carbon Structural Steel After Quenching in Circulated Water Medium Afira Ainur Rosidah; Vuri Ayu Setyowati; Suheni Suheni; Muhamad Febrianto
Jurnal IPTEK Vol 26, No 1 (2022)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2022.v26i1.1139

Abstract

The use of carbon structural steel in construction is widely developed. It is important to do research continuously in order to get the optimum mechanical and physical properties of a material. Heat treatment which includes heating and quenching is a process that can be carried out to improve mechanical properties. A fast cooling rate is used to obtain higher strength and hardness. This research studied the effect of quenching using circulated water medium with water flow rate variations in structural steel Q235, Q255, and Q275 to their mechanical properties and microstructure. The heat treatment process was done with hardening at 1150oC, roll milling at austenitizing temperature, then quenching using circulated water medium with water flow rate of 225, 238, 247 m3/h. The tensile and hardness test results showed that water flow rate and carbon content in steel give an effect on strength and hardness. The highest tensile strength and hardness value were achieved by Q275 steel with a flow rate of 247 m3/h, which are 73,49 kgf/mm2 and 298 HVN, respectively. Meanwhile, the microstructures resulted in the presence of the mixture of martensite and pearlite, as well as ferrite in every sample with the increase in the composition of martensite and pearlite in Q275 steel with a flow rate of 247 m3/h.
Pengaruh Jumlah Layer Dan Orientasi Sudut Filler Karbon Pada Polymer Matrix Composite Terhadap Kekuatan Tarik Dan Impact R. Achmad Supriyadi; Vuri Ayu Setyowati; Afira Ainur Rosidah
Prosiding SENASTITAN: Seminar Nasional Teknologi Industri Berkelanjutan Prosiding SENASTITAN Vol. 01 2021
Publisher : Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (844.104 KB)

Abstract

Komposit merupakan material yang terdiri dari dua atau lebih material sehingga menghasillkan komposit dengan sifat serta karakteristik mekanik yang berbeda. Penelitian ini bertujuan mengetahui pengaruh jumlah layer dan orientasi sudut serat karbon pada komposit terhadap kekuatan impact dan kekuatan tarik pada komposit. Penelitian ini menggunakan serat karbon sebagai filler. Pada matrik menggunakan polyester. Penyusunan komposit menggunakan metode penyusunan komposit laminat. Hasil dari pengaruh jumlah layer terhadap kekuatan impact dan kekuatan tarik terbesar terjadi pada peningkatan jumlah layer pada komposit, karena semakin bertambahnya jumlah layer atau bertambahnya volume fraksi pada material tersebut kekuatan impact dan tarik semakin meningkat. Standart pengujian tarik yang digunakan adalah ASTM D-3039. Berdasarkan hasil pengujian tarik, kekuatan komposit terbesar pada variasi 2 layer 60? sebesar 141,7 Mpa, sedangkan kekuatan tarik terendah pada variasi 3 layer 60? sebesar 72,40 Mpa. Identifikasi bagian fraktur menunjukkan bahwa mekanisme kegagalan sering terjadi ialah pemisahan serat oleh matriks (fiber pull out) serta pemisahan lapisan antara serat matriks yang putus (delamination). Pengujian impact menggunakan standar ASTM D-6110.  Hasil tertinggi pada variasi 3 layer sudut 90? sebesar 10,7 x10-2 J/mm 2 sedangkan kekuatan Impact terendah pada variasi 3 layer 45? sebesar 3,6 x10-2 J/mm2 .
Analisis Pengaruh Temperatur dan Waktu Tuang terhadap Kekerasan dan Struktur Mikro pada Pengecoran Paduan Al – Si Suheni Suheni; Afira Ainur Rosidah; Hasanuddin Hasanuddin; Danail Firmansyah
Prosiding SENASTITAN: Seminar Nasional Teknologi Industri Berkelanjutan Prosiding SENASTITAN Vol. 01 2021
Publisher : Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (520.78 KB)

Abstract

Paduan aluminium – silikon merupakan material yang banyak digunakan untuk aplikasi bagian-bagian mesin karena memiliki fluiditas yang cukup baik dan temperatur leleh rendah, sehingga mudah untuk diproduksi melalui proses pengecoran. Untuk mendapatkan hasil coran dengan sifat fisik dan mekanik yang dibutuhkan, dapat ditentukan oleh beberapa faktor, seperti temperatur dan waktu tuang. Penelitian ini bertujuan untuk mempelajari pengaruh variasi temperatur dan waktu tuang paduan Al-Si terhadap kekerasan dan struktur mikronya. Proses pengecoran pada penelitian ini menggunakan material paduan aluminium tipe ADC12 dengan metode sand casting, dengan variasi temperatur tuang 650oC, 700oC, dan 750oC, serta waktu tuang 5, 7, dan 10 detik. Setelah proses pengecoran dilakukan, hasil coran paduan Al – Si diuji kekerasannya dengan metode Vickers dan diamati struktur mikronya dengan mikroskop optik. Dari pengujian kekerasan, didapatkan nilai kekerasan tertinggi sebesar 80,306 kgf/mm2 dengan variasi temperatur tuang 650oC dan waktu tuang 5 detik. Sedangkan dari pengamatan struktur mikro didapatkan adanya fasa ?-Al dan Si, dimana semakin tinggi variasi waktu tuang maka struktur Si yang terlihat semakin terdistribusi merata dalam hasil cor paduan Al – Si.
Pengaruh Variasi Molaritas dan Jenis Inhibitor terhadap Ketahanan Korosi dan Morfologi Baja Tulangan Beton Afira Ainur Rosidah; Vuri Ayu Setyowati; Nasrul Amin
Prosiding SENASTITAN: Seminar Nasional Teknologi Industri Berkelanjutan Prosiding SENASTITAN Vol. 02 2022
Publisher : Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (442.44 KB)

Abstract

Concrete reinforcement steel is often needed as a reinforcement for a building. It is like other materials; steel concrete will experience a weakening of quality due to the corrosion process. These steels are commonly coated using inhibitors to slow down the corrosion rate. In this research, three types of inhibitors, namely sodium nitrite, phosphoric acid, and carboxylic acid will be mixed into the corrosive medium of HCl and aquades. Dissolution of each inhibitor against corrosive media uses three different molarities, that are 0.2 M, 0.5 M, and 0.8 M. Each inhibitor solution and the corrosive medium will be used as an immersion medium to carry out the corrosion process of reinforced concrete steel. For the evaluation process, each of these specimens will be calculated the value of the corrosion rate and the efficiency of the inhibitor; as well as morphological analysis will also be carried out to determine how the impact of corrosion on the reinforced concrete steel. The results of this study stated that a carboxylic acid inhibitor with a concentration of 0.8 M; its combination led at the best performance with the inhibitor efficiency of 30.20%, while a phosphoric acid inhibitor with a concentration of 0.2 M had the worst performance with an inhibitor efficiency of 24.83%. In addition, from the morphological analysis, it was also found that giving a higher concentration of an inhibitor can reduce the corrosion rate.Keywords: reinforcing steel, inhibitor, molarity, corrosion rate
Analisis Pengaruh Diameter Elektroda dan Kecepatan Las terhadap Sifat Mekanik dan Struktur Makro pada Baja AISI 1050 dengan Proses Pengelasan TIG Afira Ainur Rosidah; Suheni Suheni; Erwanda Wisnu Anarki
Prosiding SENASTITAN: Seminar Nasional Teknologi Industri Berkelanjutan Prosiding SENASTITAN Vol. 01 2021
Publisher : Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (326.985 KB)

Abstract

Pengelasan Tungsten Inert Gas (TIG) merupakan teknik pengelasan dengan menggunakan Argon dan Helium sebagai gas pelindung, serta nyala busur listrik yang berasal dari elektroda Tungsten dengan benda kerja. Ada beberapa faktor yang mempengaruhi sifat fisik dan mekanik suatu bahan setelah proses pengelasan. Pada penelitian ini, berfokus pada pengaruh variasi diameter elektroda dan kecepatan las terhadap sifat mekanik dan struktur makro baja AISI 1050. Proses las dilakukan dengan variasi diameter elektroda 1,6; 2,4; dan 3,2 mm dengan besar arus 100 A, kemudian pengelasan dilakukan bergantian menggunakan variasi diameter elektroda yang telah ditentukan dengan kecepatan pengelasan 1; 1,5; dan 2 mm/s untuk setiap variasi diameter elektroda. Berdasarkan hasil pengujian tarik, nilai kekuatan tarik maksimum tertinggi adalah sebesar 445,3 MPa dengan variasi diameter 3,2 mm dan kecepatan las 2 mm/s. Sedangkan untuk hasil uji kekerasan didapatkan nilai kekerasan tertinggi 41,125 HRC dengan variasi diameter 2,4 mm dan kecepatan las 2 mm/s. Hasil foto struktur makro hasil pengelasan menunjukkan bahwa semakin besar diameter elektroda yang digunakan, daerah penetrasi cenderung semakin dalam dan lebar. Sedangkan ketika kecepatan las semakin tinggi, maka daerah penetrasi yang dihasilkan semakin dangkal.
Analisis Laju Korosi dan Sisa Umur Pakai Pada Sistem Perpipaan Stasiun Penerima Gas Bumi agus hartadi; Afira Ainur Rosidah; Suheni Suheni
Prosiding Seminar Nasional Sains dan Teknologi Terapan 2022: Energi Terbarukan dan Keberlanjutannya di Berbagai Sektor
Publisher : Institut Teknologi Adhi Tama Surabaya

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Abstract

Korosi merupakan salah satu ancaman dalam penyediaan infrastruktur penyaluran gas bumi. Pada penelitian kali ini dilakukan pengamatan dan analisa penurunan ketebalan pipa untuk mengetahui laju korosi dan sisa umur pakai dari sistem perpipaan stasiun penerima gas. Jenis pipa yang digunakan adalah pipa carbon steel API 5L X46. Jenis alat pengukur ketebalan yang dipakai adalah ultrasonic thickness gauge dan metode perhitungan laju korosi dan sisa umur pakai sesuai standart API 510 dan ASME B31.8. Hasil perhitungan laju korosi disandingkan dengan data penyaluran gas berupa tekanan, laju alir dan impurities containt untuk mengetahui hubungannya terhadap laju korosi pada kedua periode yang berbeda. Hasilnya laju korosi mengalami penurunan sebesar 63% dari rata rata 25,12 mils per year (mpy) menjadi 9,07 mils per year (mpy). Hal ini relevan dengan penurunan kandungan H2S sebesar 2,77 ppmv dan kandungan H2O sebesar 0,1 lb/MMSCFD. Selain itu, data penyaluran gas tersebut diolah menggunakan metode statistika regresi linear berganda kuadrat terkecil untuk mengetahui urutan pengaruhnya terhadap laju korosi. Hasilnya, kandungan H2S memiliki pengaruh sebesar 8% terhadap laju korosi dan H2O memiliki pengaruh sebesar 2,5% terhadap laju korosi, sementara itu tekanan dan laju alir gas tidak terlalu berpengaruh terhadap laju korosi
Fabrication and simulation studies on sound absorption coefficient of natural microfibers reinforced silicone rubber Afira Ainur Rosidah; Vuri Ayu Setyowati
SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Vol 16, No 2 (2022): SINTEK JURNAL
Publisher : University of Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/sintek.16.2.104-111

Abstract

Silicone rubber (SR) is known as stable and able to get through an extreme environment. Moreover, the combination of SR and natural fiber as the composite for the sound absorption application is still limited. For this reason, this study was aimed to fabricate the natural fiber-reinforced porous SR for the sound absorption material. Then, the composites were simulated using multilinear regression method to predict the sound absorption coefficient and its factor influence. The composite fabrication was started with the alkalization of oil palm fiber treatment. Furthermore, the porous SR were prepared using NaCl filler to form the pores. Then, the specimen containing NaCl was soaked in warm water and all specimens were dried at 110 °C to remove the remaining water. The addition of fibers enhances the density value to the highest value of 1.061 g/cm3 with 6 wt% microfibers. The higher the microfiber addition led to the higher α value in low frequency, it occurred at SR/6 wt% microfibers with the α value of 0.356. Additionally, the most suitable equation with the smallest error is Equation 6 which has the RMSE and values of 0.05234 and 0.6138, respectively.
The Influence of Fiber Orientation and Treatment Variation of Natural Fiber Reinforced Composites on Tensile Strength and Toughness Fandy Prihatna Suhada; Afira Ainur Rosidah; Vuri Ayu Setyowati; Suheni Suheni
Journal of Applied Sciences, Management and Engineering Technology Vol 4, No 1 (2023)
Publisher : Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jasmet.2023.v4i1.4461

Abstract

Composites using natural fibers are being widely developed and researched, this is because natural fibers are easy to find and abundant. In this study, the natural fibers used were bamboo fiber and banana stems. Banana fiber has good mechanical properties and is easy to find, while bamboo fiber is easy to find and has a low density. In this study, the aim was to determine the effect of fiber orientation and treatment on the tensile strength and toughness of natural fiber reinforced composites using a polyester matrix. The variation of the fiber orientation used is 30o and 90o, and the fiber treatment used is alkali and bleaching treatment. Based on the research results, the 90o angle with fiber bleaching treatment has the highest tensile strength value, which is equal to 37.33 MPa with a modulus of elasticity of 5 GPa. As for toughness through impact testing, the highest value is 2.74 x 10-2 J/mm2 at an angle of 90o with bleaching treatment.
Effect of Current and Coating Time on the Layer Thickness and Corrosion Rate of Electroplated AISI 1045 Afira Ainur Rosidah; Vuri Ayu Setyowati; Miftahul Choir
SPECTA Journal of Technology Vol. 5 No. 1 (2021): SPECTA Journal of Technology
Publisher : LPPM ITK

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (796.012 KB) | DOI: 10.35718/specta.v5i1.337

Abstract

Corrosion mostly occurs on carbon steel which is applied for automotive components and household needs. This natural phenomenon is impossible to be avoided. However, it can be set by escalating its corrosion initiation time. Electroplating is a method that can be used to give protection to slower the corrosion initiation time by forming a layer on the specimen surface, additionally, this method is simple and low cost. One of the most commonly used metals for electroplating is nickel, nickel electroplating is suitable for automotive component coating. For these reasons, this study is focused on analyzing the effect of current and coating time on the layer thickness and corrosion rate of AISI 1045 carbon steel with nickel electroplating. The current variations used were 0.5; 1.0; and 1.5 A and the coating time variations were 5, 10, and 15 minutes. AISI 1045 was used as the cathode, nickel was as the anode, and nickel chloride was the electrolyte solution. The specimen with a current of 1.5 A and a coating time of 15 minutes shows the thickest coating and the lowest corrosion rate, with values of 0.0205 mm and 0.94 mpy, respectively. This study indicates that the increase of the current and coating time enhances the layer thickness and declines the corrosion rate.
Co-Authors agus hartadi Ahmad Anas Arifin Ali Khomsah Alifian, Fahrizal Ardi Noerpamoengkas Bambang Setyono, Bambang Crespo Romansyah Danail Firmansyah Danang Prayoga, Danang Desmas Arifianto Patriawan Diah Susanti Dwi Khusna Ehwando, Wenny Eko Agung Setiawan Erwanda Wisnu Anarki Fandy Prihatna Suhada Febrianto, Muhamad Frizka Vietanti Gatot Setyono Hasanuddin Hasanuddin Herdianto, Albertus Nova Tomy Hery Irawan, Hery Hidayat, Mas Irfan Purbawanto Hosta Ardhyananta Iftika Philo Wardani Iqbal Rizky Setyawan Jayatin Jayatin, Jayatin Joddy Arya Laksmono Lathifah, Hana Maulana, Hasan Syafik Miftachul Ulum, Miftachul Miftahul Choir Miftahul Ulum Muhamad Febrianto Muhammad Yunus Mulyo Aji Pangestu Naili Saidatin Nasrul Amin Priyahutama, Alfian Afif R. Achmad Supriyadi Rafly Rijayanto Rohmat, Muhammad Yusuf Nur Roni, Kiki Ridho Syah Sasongko, Sukendro Broto Setiawan, Eko Agung Setyowati, Vuri Ayu Suheni Suheni Suheni Suheni Suheni Suheni Suheni Suheni Suheni Suheni Suheni Suheni Suheni Suheni Suheni Syahara, Hariz Syamsuri Syamsuri Tama, Bayu Widias Ubaidulloh, Dawud Ariza Vietanti, Frizka Vuri Ayu Setyowati Vuri Ayu Setyowati Vuri Ayu Setyowati Wardani, Iftika Philo Wijaya, Ade Mundari Zain Lillahulhaq