Putra, Pradifta Satya (2019) Analisis Karakteristik Komposisi Kimia Dan Mikrostruktur Ingot Hasil Pemanfaatan Limbah Velg Dan Piston Al-Si. Sarjana thesis, Universitas Brawijaya.
Abstract
Komposisi kimia dari paduan sangat menentukan karakteristik fisik dan mekaniknya yang dapat mempengaruhi kualitas hasil coran. Pengamatan struktur mikro dilakukan sebagai salah satu cara untuk mengetahui sifat mekanik dari suatu material. Data yang diapatkan dari pengamatan struktur mikro adalah ukuran, jumlah, dan bentuk butir. Tujuan penelitian ini adalah untuk mengetahui karakteristik unsur penyusun pada hasil coran ingot dan diameter butir rata-rata butir pada hasil coran ingot. Penelitian ini dilakukan dengan variasi persentase berat sebesar, variasi A 40% piston 60% velg, variasi B 50% piston 50% velg, dan variasi C 60% piston 40% velg. Pengambilan data komposisi kimia menggunakan alat yang disebut spectrometer. Struktur mikro diamati pada bagian pinggir, tengah, dan inti ingot dengan pengambilan foto menggunakan mikroskop logam perbesaran 400x dan penghitungan ukuran butir dengan metode planimetri. Hasil penelitian ini didapatkan bahwa komposisi kimia unsur Si pada variasi A 11.56%, variasi B 12.56%, dan variasi C 12.57%. Diameter butir rata-rata pada bagian pinggir variasi A 20.3 μm, variasi B 19.6 μm variasi C 17.7 μm, kemudian pada bagian tengah variasi A 25.8 μm, variasi B 21.7 μm, variasi C 19.6 μm, dan pada bagian inti variasi A 26.7 μm, variasi B 21.7 μm dan variasi C 17.1 μm.
English Abstract
The chemical composition of the alloy determines its physical and mechanical characteristics which can affect the quality of the results of the castings. Microstructure observation is done as a way to find out the mechanical properties of a material. Data obtained from microstructural observations are the size, number, and shape of the grain. The purpose of this study was to determine the characteristics of chemical elements in ingots and average grain diameters of grains on ingots. This research was carried out with variations in weight percentages, variations of A 40% piston 60% rim, variation of B 50% piston 50% rim, and variation of C 60% piston 40% rim. Retrieving chemical composition data using a device called a spectrometer. Microstructure was observed at the edge, center, and ingot core by taking photos using a 400x magnification metal microscope and calculating grain size using the planimetric method. The results of this study showed that the chemical composition of Si elements in variation A was 11.56%, variation B was 12.56%, and variation C was 12.57%. The average grain diameter on the edge of variation A is 20.3 μm, variation of B is 19,6 μm variation C is 17.7 μm, then in the middle part variation is A 25.8 μm, variation B is 21.7 μm, variation C is 19.6 μm, and at the core part of variation A 26.7 μm, variation B 21.7 μm and variation C 17.1 μm.
Other obstract
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| Item Type: | Thesis (Sarjana) |
|---|---|
| Identification Number: | SKR/FT/2019/315/051904911 |
| Uncontrolled Keywords: | komposisi kimia, struktur mikro, pengecoran, diameter butir rata-rata, chemical composition, microstructure, casting, average grain diameter |
| Subjects: | 600 Technology (Applied sciences) > 628 Sanitary engineering > 628.3 Sewage treatment and disposal |
| Divisions: | Fakultas Teknik > Teknik Mesin |
| Depositing User: | Budi Wahyono Wahyono |
| Date Deposited: | 28 Jul 2020 05:59 |
| Last Modified: | 31 Jul 2020 06:29 |
| URI: | http://repository.ub.ac.id/id/eprint/173292 |
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