Putri, Selvi Kusrina (2016) Analisis Remaining Life Sudu Turbin Gas MW701D Stage 2 Dari Pengamatan Struktur Mikro. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Sudu turbin merupakan komponen dari turbin gas yang berfungsi untuk mengkonversi energi kinetik menjadi energi mekanik yang digunakan untuk menggerakan generator listrik. Sudu turbin gas MW701D stage 2 memiliki standard lifetime selama 72.000 Equivalen Operating Hours (EOH). Namun pada kenyataannya sudu turbin stage 2 digunakan hingga mencapai 72.331 EOH tanpa mengalami kegagalan. Dari permasalahan tersebut perlu dilakukan analisa terkait struktur mikro dan kekerasan dari komponen tersebut. Investigasi diawali dengan melakukan pengamatan makro pada sudu turbin stage 2. Kemudian dilanjutkan dengan melakukan beberapa pengujian. Spectrometer digunakan untuk melakukan uji komposisi kimia. Lalu dilakukan pengujian metalografi untuk mengetahui kondisi struktur mikro pada material menggunakan mikroskop optis dan Scanning Electron Microscope (SEM). Serta pengujian kekerasan dengan menggunakan vickers hardness test dan micro hardness test untuk mengetahui perubahan kekerasan yang terjadi. Remaining life sudu turbin dapat diprediksi dengan berdasar pada kondisi struktur mikro dan nilai kekerasan. Ditemukan adanya retak mikro pada daerah sekitar cooling holes yang menunjukkan adanya indikasi kegagalan. Selain itu ditemukan fasa Topological Closed Packed (TCP) dan karbida yang menyambung di batas butir. Hal ini membuat material menjadi getas.
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Turbine blade is a component of a gas turbine that serves to convert the kinetic energy into mechanical energy which is used to drive an electric generator. Gas turbine blades MW701D second stage have standard lifetime over 72.000 Equivalent Operating Hours (EOH). But in fact, these turbine blade is used up to 72.331 EOH without any failure. Therefore, it needs to be analyzed related to microstructure, and hardness characteristic. Investigation of turbine blade second stage starts macroscopically to know the turbine blade condition in macro scale. Then proceed to do some testing. Spectrometer is used to chemical composition test. Then, metallography testing to know microstructure condition of material by using optic microscope and Scanning Electron Microscope (SEM). Hardness testing by using Vickers Hardness Test and micro hardness to know the hardness changing of the component. Remaining life of turbine blade can be predicted by microstructure condition and hardness number. Micro crack is found around the cooling holes of turbine blade which indicated any failure. Topological Closed Packed and continuous carbides also be found in grain boundaries. It makes the component to be brittle
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSM 621.433 Put a |
| Uncontrolled Keywords: | sudu turbin, nickel based superalloy, remaining life |
| Subjects: | T Technology > TJ Mechanical engineering and machinery > TJ778 Gas turbines |
| Divisions: | Faculty of Industrial Technology > Mechanical Engineering > 21201-(S1) Undergraduate Thesis |
| Depositing User: | Yeni Anita Gonti |
| Date Deposited: | 05 Jun 2020 18:01 |
| Last Modified: | 05 Jun 2020 18:01 |
| URI: | http://repository.its.ac.id/id/eprint/76101 |
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