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Dewi Izzatus Tsamroh
Department Of Mechanical Engineering, Faculty Of Engineering, Universitas Merdeka Malang
Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Nursing Public Health Social Sciences Other

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Journal : RING Mechanical Engineering

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ANALISIS KEKERASAN DAN STRUKTUR MIKRO BAJA 304 DENGAN VARIASI HOLDING TIME Tsamroh, Dewi 'Izzatus; Pungky Eka Setyawan; Andrian Dwi Kristianto
RING ME Vol 3 No 1 (2023): RING Mechanical Engineering
Publisher : Universitas Islam Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33474/rm.v3i1.20425

Abstract

Metallurgy is the science that studies the properties of metals and their alloys through the analysis of their structures. Metal structure and alloys are the determining factors of the steel microarrangement that affect metal properties. The purpose of this study was to determine the strength and hardness of steel 304. This study used an experimental method by treating the workpiece and then characterizing it to see the results. In the hardness test it was concluded that a temperature does not affect the level of hardness of a specimen. While the cooling medium greatly affects the level of hardness. The higher the viscosity of a cooling fluid, the higher the hardness formed. Microstructural testing concluded that temperature and cooling media both have an effect on the formation of pearlite and ferrite in a material. If the temperature is the same and the fluids have the same properties, then the pearlite and ferrite contents will be the same. Pearlite will easily form at high temperatures with a high viscosity of the coolant, while ferrite will easily form if the temperature is low with a high fluid viscosity.
ANALISIS HUBUNGAN PUTARAN KATUP DENGAN KONSTANTA PEGAS DENGAN MENGGUNAKAN PEREDAMAN Tsamroh, Dewi 'Izzatus; Jumiadi; David Ross
RING ME Vol 3 No 1 (2023): RING Mechanical Engineering
Publisher : Universitas Islam Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33474/rm.v3i1.20429

Abstract

One of the problems of a machine is the vibration generated by the machine itself. Vibration is very influential on the structure and construction of the machine. One of the issues that is very important to note in these plans is the calculation of the deflection/deflection of the elements when subjected to a load. This is very important especially in terms of strength (strength) and stiffness (stiffness), where a horizontal bar that is loaded laterally will experience deflection. The deflection that occurs in elements that experience loading must be within an allowable limit. Based on the actual and theoretical research results for the Simple vibration apparatus, load and valve variations are directly proportional to the damping constant. The greater the load and valve rotation, the greater the damping constant. The beam deflection apparatus has several results, namely the load variation is directly proportional to the static deflection value. The greater the load, the greater the static deflection. Variation of distance (intermediate load point) is directly proportional to the static deflection value. The greater the distance, the greater the static deflection. Variation of distance (end load point) is directly proportional to the static deflection value. The greater the distance, the greater the static deflection. Thickness variation is inversely proportional to the static deflection value. The greater the thickness value, the smaller the static deflection. The width variation is inversely proportional to the static deflection value. The greater the width value, the smaller the static deflection.
ANALISIS HUBUNGAN ANTARA KONSTANTA PEGAS DAN DEFLEKSI STATIS DENGAN PEMBEBANAN BERBEDA TANPA PEREDAM Jumiadi; Dewi Izzatus Tsamroh; Ike Widyastuti; Arif Budiono
RING ME Vol 3 No 1 (2023): RING Mechanical Engineering
Publisher : Universitas Islam Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33474/rm.v3i1.20430

Abstract

One of the most frequently encountered motions in nature is oscillatory motion (vibration). A particle oscillates when it moves periodically about an equilibrium position. A load attached to a spring that is stretched once is released, then it begins to oscillate. Basically, vibration is a technical system that contains mass and elasticity that is able to move relatively or can be said to be a movement that repeats itself at certain time intervals. Increasing technological developments show that the tools that have to do with vibrations are very diverse. One of them is the vibration that utilizes the Simple Vibration Apparatus. In the free vibration frequency experiment, from the test results without a damper with a mass of 0.47kN/m; 1.22kN/m and 3.3kN/m it can be seen that there is a big difference between the theoretical frequency value and the actual frequency value. The results of the theoretical deflection from experiments 1 - 5 have increased constantly. The greater the loading, the greater the deflection.
ANALISIS TEGANGAN DAN REGANGAN PADA KAWAT STAINLESS STEEL 304 HASIL PERLAKUAN HARDENING DAN TEMPERING Sekiwa; Suprapto, Agus; Tsamroh, Dewi Izzatus; Rusdijanto
RING ME Vol 4 No 1 (2024): RING Mechanical Engineering
Publisher : Universitas Islam Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33474/rm.v4i1.21747

Abstract

Currently, the demand for materials, especially metals, is very significant. Iron and steel are inseparable basic needs. However, with diverse needs, the desired mechanical characteristics of a material also vary. These mechanical aspects include hardness, ductility, strength, and toughness. The use of stainless steel is increasing worldwide due to its superior characteristics. One of them is using stainless steel wire. This research aims to identify the tensile strength limit of 304 stainless steel wire with variations in hardening and tempering. The test results show that the unheat treated 304 stainless steel wire has a higher stress value than the heat treated one. The test results show that the stress value in the test object which has undergone heat treatment of hardening at a temperature of 820°C with a holding time of 30 minutes with water cooling and tempering at a temperature of 400°C with a holding time of 20, 30, 40 minutes with air cooling has decreased. This can be compared with raw or untreated specimens which have a stress value of 176.815 kg/mm2. For specimens that underwent the hardening heat treatment process, the stress value decreased to a value of 88.025 kg/mm2. Meanwhile, for test objects that underwent a tempering process, the stress also decreased compared to normal or untreated test objects with stress values ​​for 20 minutes of tempering 87,261 kg/mm2, 30 minutes of tempering 87,261 kg/mm2, and 40 minutes of tempering 87,006 kg/mm2.
ANALISIS PENGARUH KOMPOSISI GARAM TERHADAP LAJU KOROSI PADA BAJA HSS Jago, Thomas Apriliano; Tsamroh, Dewi Izzatus; Jumiadi; Setyawan, Pungky Eka
RING ME Vol 4 No 1 (2024): RING Mechanical Engineering
Publisher : Universitas Islam Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33474/rm.v4i1.21748

Abstract

Corrosion, which is the process of metal damage due to environmental factors such as microbes, pH, humidity, temperature, and contaminants from the metal itself, has very destructive properties for metal. Before implementing appropriate control methods, testing is often necessary to determine the appropriate approach. One useful testing method is the spray chamber test, the working principle of which involves creating a mist of corrosive media on the test sample. In this research, HSS steel was used as a test sample. Using a spray chamber test, salt water of various compositions is poured into a container to produce mist, which is produced by a mist maker. The mist is then pushed upwards by a small fan with a current of 12 v and sprayed onto the test specimen over an 8 day period. This tool is useful for determining the corrosion rate of the metal being tested, allowing the determination of how quickly the metal is subject to corrosion, which is useful in selecting materials for construction that are appropriate to environmental conditions. Based on the test results, it can be concluded that the corrosion rate for HSS steel is 0.070 MPY with a salt composition of 500 grams, 0.072 MPY with a salt composition of 750 grams, 0.142 MPY with a salt composition of 1.250 grams, and 0.162 MPY with a salt composition of 1.750 grams.
INVESTIGASI PENGARUH VARIASI AIR LAUT TERHADAP LAJU KOROSI BAJA ST 37 Djahilepang, Raywantus Baur; Suprapto, Agus; Tsamroh, Dewi Izzatus
RING ME Vol 4 No 1 (2024): RING Mechanical Engineering
Publisher : Universitas Islam Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33474/rm.v4i1.21765

Abstract

In the current era of globalization, metal has an important role and is a primary need in various aspects of human daily life. One metal that is widely used is steel, which is a mixture of iron (Fe) and carbon (C) with the addition of other ingredients in the modern context. Low carbon steel, such as ST 37, is often used in making components such as nails, bolts and screw threads. The affordability and availability of ST 37 makes it a top choice in the construction industry, although it is often subject to corrosion problems due to its natural properties. In various situations and conditions, the wide use of ST 37 steel often interacts with natural elements, such as sea water, river water, oxygen, pH values, and other environmental conditions. The problem of corrosion is a major concern for many researchers and industry, because it can affect various processes such as cleaning by etching, pickling, and the use of corrosive chemicals such as acids and salts to inhibit corrosion. The test results showed that the highest corrosion rate occurred in Tanjung Perak Surabaya sea water, amounting to 2.817 mpy, while Panjang Pasuruan sand sea water had the lowest corrosion rate of 0.626 mpy.
PENINGKATAN KETAHANAN AUS BAJA KARBON RENDAH MELALUI VARIASI SUHU CARBURIZING Tsamroh, Dewi Izzatus; Yazirin, Cepi; Putra, Agus Dwi
RING ME Vol 4 No 1 (2024): RING Mechanical Engineering
Publisher : Universitas Islam Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33474/rm.v4i1.21767

Abstract

The automotive industry is one of the industries that is currently developing in Indonesia. Research has been carried out on materials used in the automotive industry, one of which is improving the mechanical properties of low carbon steel which is widely used as sprocket material. Sprockets are parts of a motorbike that require surface hardness and ductility at the core. So carburizing treatment is the right treatment to increase the wear resistance of low carbon steel. The material used in this research is ST 37. This research aims to increase the surface hardness of ST 37 by varying the carburizing temperature, where the temperatures used are 850℃ and 900℃ with a holding time of 3 hours. Wear resistance testing uses the weight loss method by comparing the ST 37 sprocket with sprockets sold on the market. The highest wear resistance was obtained on sprockets with carburizing treatment at a temperature of 900℃ with test results of 1.65 x 10-2 mm3/hour.
Perbandingan Makrostrukture Hasil Cor dengan Variasi Komposisi Pasir Cetak Tsamroh, Dewi Izzatus; Yazirin, Cepi; Sasongko, Muhammad Ilman Nur
RING ME Vol 4 No 2 (2024): RING Mechanical Engineering
Publisher : Universitas Islam Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33474/rme.v4i2.22885

Abstract

Penelitian ini bertujuan untuk menganalisis perbandingan makrostruktur hasil cor dengan variasi komposisi pasir cetak. Pasir cetak memegang peran penting dalam proses pengecoran logam, karena sifatnya memengaruhi kualitas produk cor yang dihasilkan. Variasi komposisi pasir cetak, seperti persentase pasir silika, binder, dan air, diuji untuk mengamati pengaruhnya terhadap struktur makro hasil cor, termasuk cacat permukaan, kekerasan, dan homogenitas. Proses pengecoran dilakukan menggunakan metode sand casting dengan bahan logam tertentu, serta parameter proses yang terstandarisasi. Hasil pengamatan menunjukkan bahwa variasi komposisi pasir cetak memberikan dampak signifikan terhadap kualitas permukaan dan struktur internal hasil cor. Komposisi pasir cetak yang optimal mampu menghasilkan struktur makro yang lebih seragam, minim cacat, dan sesuai dengan standar kualitas industri. Penelitian ini diharapkan dapat memberikan kontribusi dalam meningkatkan efisiensi dan kualitas proses pengecoran di industri manufaktur.
Analisis Struktur Mikro pada Baja St 60 Hasil Perlakuan Hardening dengan Menggunakan Variasi Media Pendingin Tsamroh, Dewi Izzatus; Agus Dwi Putra; Jibril Maulana
RING ME Vol 4 No 2 (2024): RING Mechanical Engineering
Publisher : Universitas Islam Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33474/rme.v4i2.22886

Abstract

Penelitian ini bertujuan untuk menganalisis struktur mikro baja ST 60 setelah perlakuan pengerasan (hardening) dengan menggunakan variasi media pendingin. Baja ST 60 dipilih karena aplikasinya yang luas dalam industri konstruksi dan mesin, yang membutuhkan sifat mekanik tinggi seperti kekerasan dan ketangguhan. Proses hardening dilakukan dengan memanaskan baja hingga suhu austenisasi (850–900°C), diikuti dengan pendinginan cepat menggunakan tiga media berbeda, yaitu air, oli, dan larutan garam. Struktur mikro hasil perlakuan dianalisis menggunakan mikroskop optik untuk mengidentifikasi fasa-fasa yang terbentuk, seperti martensit, ferit, dan perlit. Hasil penelitian menunjukkan bahwa variasi media pendingin memiliki pengaruh signifikan terhadap struktur mikro dan sifat mekanik baja ST 60. Pendinginan menggunakan air menghasilkan pembentukan martensit yang lebih dominan, meningkatkan kekerasan namun berpotensi menyebabkan retakan. Pendinginan dengan oli menghasilkan struktur campuran martensit dan perlit dengan kekerasan sedang serta retakan yang lebih minim. Sementara itu, pendinginan dengan larutan garam memberikan hasil serupa dengan air, namun dengan distribusi martensit yang lebih seragam. Penelitian ini mengungkapkan bahwa pemilihan media pendingin yang tepat sangat penting untuk mengoptimalkan sifat mekanik baja ST 60 sesuai kebutuhan aplikasinya.
Perbandingan Laju Korosi dengan Menggunakan Spray Chamber Test dan Corrosion Coupon Rack pada Baja Karbon Rendah Suprapto, Agus; Tsamroh, Dewi Izzatus; Sentosa, Obaja Eden Riyanto
RING ME Vol 4 No 2 (2024): RING Mechanical Engineering
Publisher : Universitas Islam Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33474/rme.v4i2.22887

Abstract

Penelitian ini bertujuan untuk membandingkan laju korosi baja karbon rendah menggunakan dua metode pengujian, yaitu spray chamber test dan corrosion coupon rack. Baja karbon rendah dipilih karena penggunaannya yang luas di berbagai industri, seperti konstruksi dan peralatan, namun memiliki kerentanan terhadap korosi di lingkungan tertentu. Penelitian ini menggunakan metode spray chamber test dengan mensimulasikan lingkungan korosif dengan penyemprotan larutan garam secara terkontrol, sedangkan corrosion coupon rack menggunakan eksposur langsung terhadap larutan korosif dalam kondisi statis. Laju korosi dianalisis berdasarkan perubahan massa spesimen dan dievaluasi menggunakan perhitungan corrosion rate. Hasil penelitian menunjukkan bahwa laju korosi yang dihasilkan oleh spray chamber test cenderung lebih tinggi dibandingkan dengan corrosion coupon rack. Hal ini disebabkan oleh mekanisme penyemprotan yang meningkatkan kontak permukaan spesimen dengan larutan korosif, mempercepat reaksi oksidasi. Sementara itu, corrosion coupon rack menunjukkan laju korosi yang lebih lambat karena kondisi larutan statis yang mengurangi dinamika reaksi.
Co-Authors Abdullah, Mohd Firdaus Abdurrabi Abdurrabi Abi Suwito Agus Dwi Putra Agus Dwi Putra Agus Suprapto Ahmad Muflih Ahmad Saepuddin Aji, Bagas Dwi Purnama Alief Muhammad Andrian Dwi Kristianto Andrianto, Sis Nanda Kus Andrijono, Djoko Andromeda, Tata Ani, Adi Izhar Che ANISA ZUHRIA SUGEHA Anitasari, Silvi Ardiansyah, Mochammad Fachrizal Arif Budiono Asrizal Azhar, Moh. Na'im Bella Cornelia Tjiptady Bella Cornelia Tjiptady Bimantara, Muhammad Yoka Brilliandy, Hikmal Akbar C., Muhammad Ilham Abednego Elsa Dandya, Habli Abid David Ross Dewi Puspitasari Diama Rizky Septiawan Didin Zakariya Lubis Dika, Johan Wayan Dimas Hani Saputra Djahilepang, Raywantus Baur Edi Subiyantoro Elsa C., Muhammad Ilham Abednego Ena Marlina Evi Rinata Fadillah, Rahmat Fahil Fahrozy, Muhammad Micho Firdiansyah, Mokhamad Rizki Fitriani, Indah Martha Herawati, Andini Sofia Hikmal Akbar Brilliandy Ike Widyastuti Irwandi, Jul Viansyah Dwiki Jago, Thomas Apriliano Jibril Maulana Jumiadi Jumiadi, Jumiadi Kus Andrianto, Sis Nanda Mohammad Ainul Yaqin, Mohammad Ainul Muchammad Riza Fauzy Muhammad Arif Nur Huda Muhammad Ilham Abednego Elsa C. Muhammad Ilman Nur Sasongko Mutadafiq, Fiqih Syahdani Nika Devi Permata Wijaya Permatasari, Meirna Puspita Prasanta, Ida Bagus Sradha Dana Prasetiyo, Ardianto Pratiwi, Y. R. Pungky Eka Setyawan Pungky Eka Setyawan Putra, Agus Dwi Putri, Widyarini Susilo Qur’aini, Dinda Faranita Rahmat Fahil Fadillah Ratna Fajarwati Meditama Riana Nurmalasari Riyanto, Obaja Eden Sentosa Rusdijanto Rusdijanto Rusdijanto, Rusdijanto Saifuddin Karim Santi, Fitriana Saputra, Mohammad Iqbal Juan Sekiwa Sentosa Riyanto, Obaja Eden Shiddiqy, Taqiyyudin Ahmad As Simangunsong, Rahel Sis Nanda Kus Andrianto Siskuhita, Dhoris Agritia Sudjatmiko Sudjatmiko, Sudjatmiko Sudjatmiko, Sudjatmiko Sunariati, Okta Rezki Syafana, Mohammad Arju Wea, Efrida Widyarini Susilo Putri Widyarini Susilo Putri Yayi Febdia Pradani Yazirin, Cepi