Wicaksono, Aditya Bramantyo (2022) Analisis Pengaruh Komposisi Zat Aditif Magnesium Stearat Dan Glycerin Mono Stearate Terhadap Sifat Mekanik Dan Sifat Reologi Feedstock Proyektil Frangible. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Proyektil frangible merupakan proyektil yang didesain untuk dapat hancur ketika mengenai suatu permukaan. Proyektil frangible umumnya terbuat komposit berbasis logam dengan bahan seperti tembaga (Cu) dan Poliamida 6. Proses manufaktur yang dilakukan pada penelitian ini yaitu dengan metode ekstrusi untuk membuat feedstock. Feedstock perlu memiliki kekerasan dan kekuatan tekan yang sesuai, untuk dapat digunakan sebagai proyektil frangible. Selain itu, feedstock perlu memiliki sifat reologi yang sesuai untuk dapat dilanjutkan dengan injection molding. Untuk mendapatkan sifat yang berkualitas untuk proyektil frangible, ada beberapa modifikasi yang perlu dilakukan yaitu dengan penambahan zat aditif. Zat aditif yang digunakan pada penelitian ini adalah magnesium stearate sebagai stabilizer dan gliserin monostearate sebagai plasticizer, dengan variasi komposisi 2, 3, dan 4 wt%. Untuk mengetahui sifat mekanik dari feedstock dilakukan pengujian Scanning Electron Microscopy (SEM) untuk menganalisis morfologi permukaan feedstock, pengujian tekan untuk mengetahui nilai kekuatan feedstock, dan pengujian kekerasan untuk mengetahui nilai kekerasan feedstock. Sifat reologi feedstock diestimasi menggunakan persamaan berdasarkan literatur. Hasil pengujian SEM menunjukkan adanya aglomerasi dan void pada sebagian feedstock pada variasi yang berbeda. Hasil pengujian tekan dan pengujian kekerasan menunjukkan bahwa terjadi penurunan seiring bertambahnya komposisi zat aditi. Diperoleh nilai kekuatan tekan tertinggi sebesar 98.27 MPa pada feedstock Cu/PA6 dengan penambahan aditif GMS 2% dan nilai kekerasan tertinggi sebesar 90.23 HV pada feedstock Cu/PA6 dengan penambahan aditif GMS 2%.Adapun berdasarkan perhitungan estimasi viskositas feedstock, viskositas berbanding terbalik dengan penambahan persentase komposisi zat aditif. Hal ini mengakibatkan flowabillity yang lebih baik seiring dengan penambahan persentase komposisi zat aditif. Diperoleh viskositas terendah sebesar 303.2370 Pa.s pada feedstock Cu/PA6 dengan penambahan aditif GMS 4%
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A frangible projectile is a projectile that is designed to disintegrate when it hits a surface. Frangible projectiles are generally made of metal-based composites with materials such as copper (Cu) and Polyamide 6. The manufacturing process carried out in this research is the extrusion method to make feedstock. The feedstock needs to have the appropriate hardness and compressive strength, in order to be used as a frangible projectile. In addition, the feedstock needs to have appropriate rheological properties to be able to proceed with injection molding. To obtain quality properties for frangible projectiles, there are several modifications that need to be made, namely the addition of additives. The additives used in this study were magnesium stearate as stabilizer and glycerin monostearate as plasticizer, with various compositions of 2, 3, and 4 wt%. To determine the mechanical properties of the feedstock, a Scanning Electron Microscopy (SEM) test was carried out to analyze the surface morphology of the feedstock, a compression test to determine the strength value of the feedstock, and a hardness test to determine the hardness value of the feedstock. The rheological properties of the feedstock were estimated using equations based on the literature. The results of the SEM test showed that there were agglomerations and voids in some of the feedstocks at different variations. The results of the compression test and hardness test showed that there was a decrease with increasing the composition of the additive. The highest compressive strength value was obtained at 98.27 MPa in Cu/PA6 feedstock with the addition of 2% GMS additive and the highest hardness value was 90.23 HV in Cu/PA6 feedstock with the addition of 2% GMS additive. Meanwhile, based on the calculation of the feedstock viscosity estimation, the viscosity is inversely proportional to the addition of the percentage of additive composition. This results in better flowability along with the addition of the percentage of additive composition. The lowest viscosity was obtained at 303.2370 Pa.s in Cu/PA6 feedstock with the addition of 4% GMS additive
| Item Type: | Thesis (Other) |
|---|---|
| Additional Information: | RSMt 620.118 Wic a-1 2022 |
| Uncontrolled Keywords: | Feedstock, Zat Aditif, Sifat Mekanik, Reologi, Feedstock, Additives, Mechanical Properties, Rheology |
| Subjects: | T Technology > TL Motor vehicles. Aeronautics. Astronautics > TL240.5 Composite materials |
| Divisions: | Faculty of Industrial Technology > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis |
| Depositing User: | Mr. Marsudiyana - |
| Date Deposited: | 11 Feb 2025 01:58 |
| Last Modified: | 11 Feb 2025 01:58 |
| URI: | http://repository.its.ac.id/id/eprint/118620 |
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