Atmoko, Prasetya Dwi (2015) Pengaruh temperatur aging dan waktu holding aging terhadap struktur mikro, sifat mekanik, dan ketahanan termal pada presipitasi hardening paduan Mg6ZnO,5Y sebagai aplikasi engine block. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Paduan magnesium banyak diaplikasikan pada dunia otomotif mobil atau motor dan mesin pesawat terbang. Hal ini dikarenakan berat dari magnesium sendiri yang sangat ringan dan memiliki kekuatan tinggi. Serta paduan magnesium memiliki konduktifitas termal yang baik, modulus elastisitas yang tinggi dan memiliki sifat mekanik yang baik. Magnesium dalam aplikasi teknik biasanya di padukan dengan unsur seperti Al, Ag, Mn, Zn, Si, Zr dan RE (rare element). Pada penelitian ini telah dilakukan perlakuan persipitasi hardening paduan Mg-6Zn-0.5Y dengan menggunakan variabel temperatur 1500C , 175 0C dan 200 0C dengan waktu holding 12 jam, 24 jam dan 36 jam. Hasil penelitian menunjukkan struktur mikro yang terbentuk adalah αMg, MgZn, dan Mg3Zn6Y (i-Phase). Terbentuknya presipitat saat proses aging menaikkan nilai kekerasan hingga mencapai 75,8 BHN. Perlakuan aging mengurangi ketahanan thermal paduan Mg6Zn0,5Y.
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Magnesium alloys are widely applied in the automotive world cars or motorcycles and aircraft engines. This is because the weight of the magnesium itself is very lightweight and have high strength. And magnesium alloys have good thermal conductivity, high elastic modulus and good mechanical properties. Magnesium in engineering applications is usually in the mix with elements such as Al, Ag, Mn, Zn, Si, Zr and RE (rare element). Magnesium alloys with zinc are mostly found and used. This research has been carried out precipitation hardening treatment-Mg alloy-0.5Y 6Zn using variable temperature 150oC, 175oC and 200oC with a holding time of 12 hours, 24 hours and 36 hours. The results show microstructure formed is αMg, MgZn, and Mg3Zn6Y (i-Phase). The formation of precipitates during the process of aging raise hardness values up to 75.8 BHN. Aging treatment reduces the thermal resistance of the alloy Mg6Zn0,5Y.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSMt 671.36 Atm p |
| Uncontrolled Keywords: | Mg6Zn0.5Y; Presipitasi Hardening; Paduan Mg; Engine Block |
| Subjects: | T Technology > TN Mining engineering. Metallurgy > TN690 Metallography. Physical metallurgy |
| Divisions: | Faculty of Industrial Technology > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis |
| Depositing User: | - Taufiq Rahmanu |
| Date Deposited: | 01 Nov 2018 03:57 |
| Last Modified: | 01 Nov 2018 03:57 |
| URI: | http://repository.its.ac.id/id/eprint/59929 |
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