Garuda - Garba Rujukan Digital

Software Simulation and Experiment for Production of a Pillow Block Using Sand Casting Process Raharjo, Rudianto; Widodo, Teguh Dwi; Bintarto, Redi; Azhar, Andika; Wibisono, Aryasatya Rafli; D, Dhimas Kaukabi
International Journal of Mechanical Engineering Technologies and Applications Vol. 3 No. 2 (2022)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2022.003.02.5

Of many manufacturing processes, sand casting is one of the most widely used since there is no size limit of the workpiece. Big size product can be carried out at an affordable cost. In its process, sand casting comprises interconnected and complex series. If some of the processes are not properly carried out e.g. during solidification, will result in defects in the casting products. Simulation is an important method currently since it can model the entire metal casting process and show the dynamic character of the casting scheme. In this study, CAD is used for a 3D design on casting simulation. In this study, the grain size of molded sand, material quality and other process parameters were considered identical to all design schemes. This study aims to investigate the effect of varied design and dimensions of the gating system. It was found in this study that porosity and improper solidification were related to the improper gating and riser design.

INFLUENCE OF LORJUK MUSSEL SHELLS AND PEANUT SHELLS AS CARBURIZER MEDIA IN THE PACK CARBURIZING PROCESS OF AISI 1020 Achmadi, Achmadi; Widodo, Teguh Dwi; Irawan , Yudy Surya
International Journal of Mechanical Engineering Technologies and Applications Vol. 6 No. 1 (2025)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2025.006.01.4

AISI 1020 steel is low-carbon steel with a carbon content of 0.20% and good ductility but low hardness. One of the methods to increase the hardness is by infusing carbon. The addition of carbon, called carburizing, was done by heating at a high enough temperature, namely at austenite temperature, in an environment containing active carbon atoms so that the active carbon atoms would diffuse into the steel surface and reach a certain depth. After the diffusion process, a rapid cooling treatment (quenching) is followed to obtain a harder surface, but the center is ductile. The carburizing process requires activation energy to diffuse carbon in the material. Catalysts are one solution to increase activation energy so that the time required during the carburization process is less. The study used carburizer from Lorjuk mussel shells as a catalyst and peanut shell charcoal as a source of activated carbon. The variations used were 0% catalyst/100% charcoal, 10% catalyst/90% charcoal, 20% catalyst/80% charcoal, and 30% catalyst/70%. The results of the study obtained the highest hardness and carbon diffusion values, the smallest corrosion rate obtained in the addition of 30% catalyst, and the lowest hardness in specimens without catalyst.

ECO – INNOVATIVE CARBURIZING: ENHANCING STEEL ST 37 WITH ALABAN CHARCOAL AND EGGSHELL CATALYSTS Ahmad Robittah; Suprapto, Wahyono; Widodo, Teguh Dwi; Wirawan , Willy Artha; Sabitah, A’yan
International Journal of Mechanical Engineering Technologies and Applications Vol. 6 No. 1 (2025)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2025.006.01.13

This study examines the enhancement of St 37 steel through an eco-friendly carburization process using Alaban charcoal and eggshell catalyst. The agriculture sector in South Kalimantan, Indonesia, depends largely on metal tools made from low-carbon steel, which need greater hardness and durability. Traditional carburization techniques are costly and often lead to uneven carbon distribution. This research investigates the use of Alaban wood charcoal and local duck eggshell waste as carburizing agents. The experiment involved varying the weight ratio of charcoal to eggshell powder, then carburizing at 950°C for two hours, followed by water quenching. The results indicated a notable increase in surface carbon content, diffusion depth, hardness, and microstructure of St 37 steel. The optimal combination, achieving the highest surface hardness of 947 HV and a carbon diffusion depth of 1.0 mm, was found at an eggshell catalyst concentration of 30%. All samples exhibited a microstructural change to martensite. These results demonstrate the potential of using agricultural waste to enhance steel properties, promoting more sustainable and cost-effective industrial practices.

Sosialisasi Prevensi dan Mitigasi Penyakit Emerging dan Re-Emerging pada Industri Peternakan Sapi Perah di Koperasi Unit Desa Sembada Puspo Kabupaten Pasuruan Dwi Kristanto; Widi Nugroho; Danung Nur Adli; Aprilia Rizky Riadini; Ari Vithon Khasib Mubarok; Atsir Farhan; Bilqis Afifa Dana Putri; Hanifa Zahra Wibowo; Nadia Ananda Prasetia Dion; Rahmadhani Angger Syahputra; Teguh Dwi Widodo
Sasambo: Jurnal Abdimas (Journal of Community Service) Vol. 7 No. 1 (2025): February
Publisher : Lembaga Penelitian dan Pemberdayaan Masyarakat (LITPAM)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/sasambo.v7i1.2478

Penyakit emerging dan re-emerging yang melanda peternakan ruminansia di Indonesia dalam dua tahun terakhir menyebabkan penurunan populasi ternak dan kerugian ekonomi besar. Program ini bertujuan meningkatkan kesadaran paramedik veteriner dan peternak dalam deteksi dini penyakit melalui sosialisasi dan edukasi. Kegiatan ini dilaksanakan pada Agustus 2024 di KUD Sembada Puspo, Kabupaten Pasuruan, melibatkan 35 peserta, termasuk ketua kelompok ternak dan paramedik veteriner. Tahapan pelaksanaan meliputi pre-sosialisasi (engagement, identifikasi masalah, need assessment, dan FGD), sosialisasi (pemaparan materi tentang penyakit, pencegahan, dan penanganan wabah), serta post-sosialisasi (evaluasi dampak melalui pre- dan post-test serta indeks kepuasan masyarakat). Hasil pre-test menunjukkan 25,43% peserta memiliki pengetahuan baik, 49,14% cukup, dan 25,43% kurang. Setelah program, hasil post-test meningkat menjadi 73,71% baik, 23,14% cukup, dan 3,14% kurang. Indeks kepuasan masyarakat menunjukkan delapan aspek di atas 60%, sementara dua aspek masih di bawah. Kesimpulannya, program ini efektif meningkatkan pengetahuan peserta dan mencegah masuknya penyakit ke kawasan peternakan. Dampaknya adalah nol kasus emerging dan re-emerging disease, yang berkontribusi pada produktivitas susu serta keberlanjutan peternakan. Socialization of Prevention and Mitigation of Emerging and Re-Emerging Diseases in the Dairy Cattle Industry at the Sembada Puspo Village Unit Cooperative, Pasuruan Regency Emerging and re-emerging diseases affecting ruminant farming in Indonesia over the past two years have led to a decline in livestock populations and significant economic losses. This program aims to raise awareness among veterinary paramedics and farmers about early disease detection through socialization and education. The program was conducted in August 2024 at KUD Sembada Puspo, Pasuruan Regency, involving 35 participants, including livestock group leaders and veterinary paramedics. The implementation stages included pre-socialization (engagement, problem identification, need assessment, and FGD), socialization (presentation on disease identification, prevention strategies, and outbreak management), and post-socialization (impact evaluation through pre- and post-tests and a community satisfaction index). Pre-test results showed that 25.43% of participants had good knowledge, 49.14% had moderate knowledge, and 25.43% had poor knowledge. After the program, post-test results improved to 73.71% good, 23.14% moderate, and 3.14% poor. The community satisfaction index indicated that eight aspects scored above 60%, while two aspects remained below this threshold. In conclusion, the program effectively enhanced participants' knowledge and helped prevent disease outbreaks in livestock farming areas. The impact resulted in zero emerging and re-emerging disease cases, contributing to milk productivity and sustainable livestock farming

INFLUENCE OF LORJUK MUSSEL SHELLS AND PEANUT SHELLS AS CARBURIZER MEDIA IN THE PACK CARBURIZING PROCESS OF AISI 1020 Achmadi, Achmadi; Widodo, Teguh Dwi; Irawan , Yudy Surya
International Journal of Mechanical Engineering Technologies and Applications Vol. 6 No. 1 (2025)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2025.006.01.4

AISI 1020 steel is low-carbon steel with a carbon content of 0.20% and good ductility but low hardness. One of the methods to increase the hardness is by infusing carbon. The addition of carbon, called carburizing, was done by heating at a high enough temperature, namely at austenite temperature, in an environment containing active carbon atoms so that the active carbon atoms would diffuse into the steel surface and reach a certain depth. After the diffusion process, a rapid cooling treatment (quenching) is followed to obtain a harder surface, but the center is ductile. The carburizing process requires activation energy to diffuse carbon in the material. Catalysts are one solution to increase activation energy so that the time required during the carburization process is less. The study used carburizer from Lorjuk mussel shells as a catalyst and peanut shell charcoal as a source of activated carbon. The variations used were 0% catalyst/100% charcoal, 10% catalyst/90% charcoal, 20% catalyst/80% charcoal, and 30% catalyst/70%. The results of the study obtained the highest hardness and carbon diffusion values, the smallest corrosion rate obtained in the addition of 30% catalyst, and the lowest hardness in specimens without catalyst.

ECO – INNOVATIVE CARBURIZING: ENHANCING STEEL ST 37 WITH ALABAN CHARCOAL AND EGGSHELL CATALYSTS Ahmad Robittah; Suprapto, Wahyono; Widodo, Teguh Dwi; Wirawan , Willy Artha; Sabitah, A’yan
International Journal of Mechanical Engineering Technologies and Applications Vol. 6 No. 1 (2025)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2025.006.01.13

This study examines the enhancement of St 37 steel through an eco-friendly carburization process using Alaban charcoal and eggshell catalyst. The agriculture sector in South Kalimantan, Indonesia, depends largely on metal tools made from low-carbon steel, which need greater hardness and durability. Traditional carburization techniques are costly and often lead to uneven carbon distribution. This research investigates the use of Alaban wood charcoal and local duck eggshell waste as carburizing agents. The experiment involved varying the weight ratio of charcoal to eggshell powder, then carburizing at 950°C for two hours, followed by water quenching. The results indicated a notable increase in surface carbon content, diffusion depth, hardness, and microstructure of St 37 steel. The optimal combination, achieving the highest surface hardness of 947 HV and a carbon diffusion depth of 1.0 mm, was found at an eggshell catalyst concentration of 30%. All samples exhibited a microstructural change to martensite. These results demonstrate the potential of using agricultural waste to enhance steel properties, promoting more sustainable and cost-effective industrial practices.

Characterization of Bamboo Petung Fiber Reinforced Composites with Environmentally Friendly Enzymes Raharjo, Rudianto; Widodo, Teguh Dwi; Bintarto, Redi; Alamsyah, Fikrul Akbar
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 9, No 1 (2025)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um016v9i1p165

Natural fiber composites are a good choice for many businesses uses because of their better mechanical properties and are friendly environment. Researchers are currently looking into bamboo petung fiber (BPF) and epoxy composites as alternative to synthetic fibers and products made from petroleum. This study's goal is to improve the overall performance of these composites while reducing the need for non-organic materials. This study used the various concentration of bromelain enzyme in BPF to changes the mechanical and physical properties of epoxy composites made from BPF. Composites were characterized the mechanical properties including tensile strength using tensile tester, impact strength using Charpy impact test, bending strength using three point bending methods, and surface morphology observation using scanning electron microscope. This study indicates that BPF composites that have been treated with bromelain enzyme have better mechanical properties. After being treated with bromelain, the BPF composite's tensile strength increase up to 59% with maximum tensile strength of 138.230 MPa, flexural strength increases up to 42% with maximum flexural strength of 135.58 MPa, and impact strength increases up to 64% with maximum impact strength of 4.88 J/m. The bond between the epoxy resin and the BPF makes the composite stronger. These results suggest that combining natural fibers and enzymes can make composite materials that work well and are strong.

Grape seed oil as a sustainable cutting fluid in minimum quantity lubrication (MQL) for enhanced surface roughness and corrosion resistance in 316L stainless steel face milling Widodo, Teguh Dwi; Raharjo, Rudianto; Bintarto, Redi; Anjasari, Asri; Wahyudiono, Arif; Abidin, Muhammad Zaimi Bin Zainal
Mechanical Engineering for Society and Industry Vol 5 No 2 (2025): Issue in Progress (July-December)
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/mesi.13399

This work investigates grape seed oil as a green substitute for conventional mineral-based cutting fluids to reach sustainable manufacturing methods. The application of grape seed oil as a cutting fluid in the machining of 316L stainless steel using the MQL method has not been documented in prior research studies. In this work, the study focuses on determining the effect of the grape seed oil on the surface integrity and comparing these findings to standard dry machining conditions by examining surface topography, roughness, and corrosion resistance at three different spindle speeds (1500, 1800, and 2100 rpm). Results of experiments showed that grape seed oil greatly improved surface quality and corrosion resistance. Surface roughness dropped noticeably by 61.6% at 1500 rpm as opposed to dry machining. Likewise, changes in surface roughness noted were 54.0% at 1800 rpm and 54.9% at 2100 rpm. Furthermore, the potentiodynamic polarization data show that the grape seed oil greatly prevents post-machining corrosion of 316 L stainless steel. The corrosion rates of the material face milled using grape seed oil were decreased by 78.6%, 74.6%, and 80.8% at spindle speeds of 1500, 1800, and 2100 rpm, respectively, when compared with dry face milling. These results indicate that grape seed oil demonstrates its ability as a cutting fluid even for high-speed machining operations. Hence, grape seed oil can address industrial demands for more environmentally friendly manufacturing methods.

Title

Found 38 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 38 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 38 Documents
Search