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All Journal Journal of Technomaterial Physics AMMA : Jurnal Pengabdian Masyarakat Jurnal Foundry
Lutiyatmi
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Humanities Astronomy Chemistry Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Nursing Physics

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Penerapan Pembuatan Sampel Uji Tarik FCD Type Y-Blok Spesimen pada PT. Aneka Adhilogam Karya Klaten Iqbal Zulfikar Alief Utama; Lutiyatmi; Akhmad Nurdin
AMMA : Jurnal Pengabdian Masyarakat Vol. 4 No. 11 : Desember (2025): AMMA : Jurnal Pengabdian Masyarakat
Publisher : CV. Multi Kreasi Media

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Abstract

The metal casting process can be briefly interpreted as a sequence of processes for making cast objects that are mutually continuous, starting from the design of the cast object to the final processing process. The Ceper metal casting industry is also a metal casting industry that carries out the casting process, one type of cast product is a product from cast iron with the type of nodular cast iron (FCD) and consumers who order this FCD product come from various groups, both private institutions and government institutions, even internationally. Consumers want the ordered product to be good and high quality, to meet these consumer demands, the metal casting industry that produces products must have their products tested and maintained for quality both in terms of manufacturing and testing. FCD products made in the Ceper metal casting industry, most of the product results and their testing have not been able to meet the standard FCD criteria. The results of supporting tests to determine the type of FCD product include the FCD product manufacturing process, chemical composition tests, hardness, metallography, thermocouples and tensile strength of the products made. The purpose of this study is to obtain quality nodular cast iron (FCD) casting products according to the needs of the Ceper metal casting industry and can reduce the reject ratio of cast products. This community service program was conducted to implement the production of nodular cast iron samples in partner industries, and to conduct the testing process along with the creation of standard samples. Molds for tensile test samples were created and further research was conducted on the method for producing Y-Block Tensile Test Specimens.
Failure Mechanism Identification of Hook Components in Automatic Machines Using Visual and Material Analysis RAHMAWATI, NABILA DESY; LUTIYATMI
Journal of Technomaterial Physics Vol. 7 No. 2 (2025): Journal of Technomaterial Physics
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jotp.v7i2.23428

Abstract

The hook component in automatic packaging machines frequently experiences premature failure, leading to increased downtime, higher maintenance costs, and reduced production efficiency. This study aims to identify the failure mechanism of the hook through visual inspection, maintenance data analysis, and material characterization. Visual examination was conducted on broken hook specimens to identify fracture morphology and surface characteristics. Historical maintenance records from 2017 to 2024 were analyzed to identify the frequency and type of failure. Chemical composition testing was performed using Optical Emission Spectroscopy (OES), while Rockwell hardness testing (HRC) evaluated the material’s mechanical properties. The results revealed that the failure mode was categorized as brittle fracture, indicated by flat and granular fracture surfaces without plastic deformation. The main failure factor was the direct impact between the hook and the punch, caused by misalignment due to bearing wear. The material, classified as medium carbon steel with 0.599 wt.% C and 1.000 wt.% Mn, exhibited high hardness but low toughness, leading to a brittle fracture under impact loading. Surface hardening combined with light tempering and shot peening is recommended to improve wear resistance and toughness, thereby reducing the risk of brittle fracture.
KEKERASAN, STRUKTUR MIKRO, DAN CACAT POROSITAS PADA PELEBURAN ALUMINIUM DENGAN VARIASI SUHU 680°C DAN 715°C Lutiyatmi; Medi Sonianto
Journal Foundry Vol. 5 No. 1 (2022): JOURNAL FOUNDRY
Publisher : Journal Foundry

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Produk water cooling magnetron yang berfungsi sebagai pendingin pada elemen panas mengalami kebocoran saat diaplikasikan dengan cara dialirkan cairan pendingin bertekanan tinggi. Masalah tersebut disebabkan karena terdapat cacat porositas pada produk, cacat porositas dapat disebabkan karena tingginya temperatur tuang pada cairan logam. Penelitian ini dilakukan untuk mengetahui bagaimana pengaruh temperatur tuang pada peleburan aluminium terhadap cacat porositas, kekerasan dan metalografi. Penelitian ini dilakukan dengan membuat benda cor pada peleburan aluminium dengan variasi temperatur tuang 680oC dan 715°C. Proses pengujian yang dilakukan adalah presentase cacat porositas dengan menghitung presentase porositas, perhitungan densitas teoritis dan densitas actual. Pengujian lain yang dilakukan adalah uji kekerasan dan uji metalografi. Hasil penelitian ini menunjukkan bahwa temperatur tuang berpengaruh terhadap presentase porositas, kekerasan dan metalografi. Temperatur tuang 680oC menghasilkan presentase porositas 1,18%, kekerasan 44,98 HRB dan struktur mikro dengan fase Al, fase Si dan fase AlSiCu sedangkan untuk temperature tuang 715°C menghasilkan presentase porositas 1,84%, kekerasan 46,93 HRB dan struktur mikro dengan penyebaran butir yang cukup seragam dibandingkan pada temperatur 680°C.
Co-Authors Medi Sonianto Nurdin, Akhmad RAHMAWATI, NABILA DESY Zulfikar Alief Utama, Iqbal