Hakim, Muhammad Haidar (2021) Analisis Pengaruh Variasi Temperatur Pada Proses Solution Treatment Dan Variasi Holding Time Pada Proses Artificial Aging Terhadap Struktur Mikro Dan Kekerasan Paduan Cu-Zn-Al. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Paduan Cu-Zn-Al adalah alternatif paduan ingat bentuk yang dapat kembali ke bentuk awal dengan perlakuan panas yang potensial untuk dikembangkan. Paduan Cu-22Zn-2,6Al dalam penelitian ini didapatkan melalui proses pengecoran kemudian diberikan perlakuan panas homogenizing, annealing, solution treatment variasi temperatur 800°C, 850°C, dan 900°C (20 menit) dan artificial aging pada 200°C dengan variasi holding time 3, 5, dan 7 jam. Dari hasil pengujian, struktur mikro yang terbentuk adalah β dan γ pada spesimen hasil solution treatment dan artificial aging. Struktur mikro setelah solution treatment dengan quenching media brine hanya menghasilkan fasa β saja. Tidak terbentuknya β’ (martensit) dikarenakan temperatur martensite start yang sangat ekstrim di bawah 0°C. Nilai kekerasan tertinggi pada solution treatment terdapat pada spesimen T850 senilai 191 HV. Adanya presipitat γ pada spesimen artificial aging semakin meningatkan kekerasan. Nilai kekerasan tertinggi pada artificial aging terdapat pada spesimen T850t5 senilai 207.67 HV. Semakin lama waktu aging menurunkan temperatur transformasi dan secara menyeluruh meningkatkan sifat kekerasan.
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Cu-Zn-Al alloy is an alternative alloy that can return to its original shape by heat treatment with great potential to be developed. Cu-22Zn-2,6Al alloy in this study was obtained through a casting process, then homogenizing, annealing, solution treatment on 800°C, 850°C, and 900°C for 20 minutes and artificial aging on 200°C for 3, 5, 7 hours were carried out. From the results of metallographic testing, the microstructure formed is β and γ in solution treatment and artificial aging specimen. The microstructure after the solution treatment with brine quenchant only produced the β phase. There is no formation of β '(martensite) due to the extreme martensite start temperature below 0°C. The highest hardness value in solution treatment achieved by T850 specimen which is 191 HV.The γ precipitate in artificial aging specimen increases the hardness. The highest hardness value in artificial aging achieved by T850t5 specimen which is 207,67 HV. Increases of aging time will decreases the transformation temperature and overall increases the hardness of the alloy.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Uncontrolled Keywords: | Artificial Aging, Cu-Zn-Al, Hardness, Micro Structure, Solution Treatment,Artificial Aging, Cu-Zn-Al, Kekerasan, Solution Treatment, Struktur Mikro. |
| 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: | Muhammad Haidar Hakim |
| Date Deposited: | 25 Feb 2021 05:52 |
| Last Modified: | 25 Feb 2021 05:52 |
| URI: | http://repository.its.ac.id/id/eprint/82790 |
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