Wicaksono, Bayu Murti (2020) Pengaruh Variasi Penambahan Konsentrasi Tepung Kanji terhadap Struktur, Morfologi Permukaan dan Ketahanan Oksidasi Temperatur Tinggi dari Paduan Ti-6Al-4V yang Dioksidasi dengan Metode Plasma Electrolytic Oxidation untuk Aplikasi Fan Blade Mesin Pesawat. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Fan blade merupakan bagian dari mesin turbin pesawat yang umumnya terbuat dari paduan Ti-6Al-4V karena memiliki rasio kekuatan terhadap densitas yang tinggi. Akan tetapi, paduan ini perlu ditingkatkan ketahanan oksidasi temperatur tingginya agar mampu diaplikasikan sebagai fan blade. Untuk meningkatkan sifat tersebut, dilakukan teknologi pelapisan Plasma Electrolytic Oxidation (PEO). Penambahan zat aditif pada larutan elektrolit PEO biasa digunakan untuk mendapatkan lapisan oksida yang diinginkan. Larutan elektrolit yang digunakan pada proses ini memiliki komposisi NaOH (10 g/L), Na2SiO3 (70 g/L) dan zat aditif yaitu tepung kanji. Tujuan penelitian ini adalah menganalisa pengaruh konsentrasi tepung kanji terhadap morfologi dan ketahanan oksidasi temperatur tinggi paduan Ti-6Al-4V yang dioksidasi dengan PEO. Variasi konsentrasi tepung kanji yang digunakan yaitu 0 g/L, 2.5 g/L, 5 g/L, 7.5 g/L dan 10 g/L. Dari hasil pengujian XRD, didapatkan fasa titanium oksida dan silica pada lapisan oksida semua sampel. Hal ini membuktikan penambahan tepung kanji tidak membentuk unsur kimia baru pada lapisan oksida. Dari pengujian SEM didapat penambahan konsentrasi tepung kanji mengurangi ukuran mikropori dan ketebalan lapisan oksida yang di dapat. Sifat ketahanan oksidasi temperatur tinggi paling baik didapat pada sampel PEO dengan 10 g/L tepung kanji yang dioksidasi selama 5 jam yaitu dengan penambahan massa/luasan sampel hanya sebesar 0.22 mg/cm2. Hal ini karena sampel ini mempunyai mikropori paling kecil daripada sampel lainnya.
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Fan blade is a part of turbine engine which is generally made of Ti-6Al-4V alloy because they have high strength to density ratio. However, this alloy needs to be improved in its high temperature oxidation resistance to be applied as a fan blade. To improve this property, a coating technology called Plasma Electrolytic Oxidation (PEO) was used. Addition of additive substances to the PEO electrolyte solution is commonly used to obtain the good oxide layer. The compositions of electrolyte solution used in this process were NaOH (10 g/L), Na2SiO3 (70 g/L) and starch as additive. The purpose of this research was to analyze the effects of the addition starch concentration on morphology and high temperature oxidation resistance of Ti-6Al-4V alloys which were oxidized with PEO. Variations in starch concentration used were 0 g/L, 2.5 g/L, 5 g/L, 7.5 g/L and 10 g/L. From XRD test, the phase obtained in the oxide layer of all samples were titanium oxide (TiO2) and silica (SiO2) and there were no any other chemical elements in the oxide layer due to addition of starch. From SEM test, it proved that the addition of starch concentration reduces the micropores size and thickness of the oxide layer. The high temperature oxidation resistance property is getting better along with the increasing starch concentration caused by the smaller size of the micropores oxide layer. So, the specimen with 10 g/l addition of starch has the best properties along with the result of high temperature oxidation test with addition of mass/area is 0.22 mg/cm2.
| Item Type: | Thesis (Other) |
|---|---|
| Additional Information: | RSMt 669.722 Wic p-1 2020 |
| Uncontrolled Keywords: | Fan blade, Plasma Electrolytic Oxidation, Tepung kanji, Ti-6Al-4V, Ketahanan Oksidasi Temperatur Tinggi. |
| Subjects: | T Technology > TJ Mechanical engineering and machinery > TJ561 Surface T Technology > TS Manufactures > TS176 Manufacturing engineering. Process engineering (Including manufacturing planning, production planning) T Technology > TS Manufactures > TS699 Powder coating of metals |
| Divisions: | Faculty of Industrial Technology and Systems Engineering (INDSYS) > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis |
| Depositing User: | Bayu Murti Wicaksono |
| Date Deposited: | 15 May 2023 02:36 |
| Last Modified: | 15 May 2023 02:36 |
| URI: | http://repository.its.ac.id/id/eprint/73160 |
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