Pradhana, Ghanistra Yudha (2021) Analisis Pengaruh Variasi Holding Time Pada Proses Solution Treatment Dan Variasi Temperatur Pada Proses Artificial Aging Terhadap Struktur Mikro Dan Kekerasan Paduan Cu-Zn-Al. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Sistem paduan Cu-Zn-Al merupakan salah satu paduan shape memory alloy yang dapat memulihkan kembali bentuk awal paduan setelah dilakukan deformasi dengan cara melakukan proses pemanasan sampai melewati temperatur transformasinya. Paduan Cu-22Zn-2,6Al pada penelitian ini dibuat dengan metode casting dan dilanjutkan dengan pemberian perlakuan panas homogenizing, annealing, solution treatment (20, 40, dan 60 menit), dan artificial aging (150, 200, 250ºC). Dari hasil pengujian, didapatkan spesimen setelah proses solution treatment dan artificial aging memiliki fasa β dan γ. Fasa β’ martensit tidak muncul karena temperatur martensite start teoritis yang berada di bawah 0ºC. Kekerasan terbesar pada hasil solution treatment ada pada variasi 40 menit yaitu 213,67 HV dan kekerasan terbesar hasil artificial aging ada pada variasi 250oC yaitu 232,67 HV. Adanya proses artificial aging menimbulkan presipitat γ pada paduan, presipitat inilah yang membuat kekerasan semakin meningkat seiring dengan bertambahnya temperatur aging.
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The Cu-Zn-Al alloy system is one of the shape memory alloys which can restore its original shape of the alloy after deformation by heating it until it passes the transformation temperature. The Cu-22Zn-2,6Al alloy in this study was made by casting method and heat treated by homogenizing, annealing, solution treatment (20, 40, and 60 minutes), and artificial aging (150, 200, 250ºC). From the test results, it was found that specimens after the solution treatment and artificial aging processes have β and γ phases. The β' martensite phase does not appear because the theoretical martensite start temperature is below 0oC. The greatest hardness in the solution treatment results is in the 40 minutes variation, which is 213,67 HV and the greatest hardness in the results of artificial aging is in the 250ºC variation, which is 232,67 HV. The existence of an artificial aging process causes γ precipitates in the alloy, this precipitate makes the hardness increase with increasing aging temperature.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Uncontrolled Keywords: | Artificial Aging, Cu-Zn-Al, Kekerasan, Solution Treatment, Struktur Mikro, Artificial Aging, Cu-Zn-Al, Hardness, Microstructure, Solution Treatment. |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA418.42 Hardness properties and tests. Hardness--Testing. T Technology > TN Mining engineering. Metallurgy > TN690 Metallography. Physical metallurgy |
| Divisions: | Faculty of Industrial Technology and Systems Engineering (INDSYS) > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis |
| Depositing User: | Ghanistra Yudha Pradhana |
| Date Deposited: | 27 Feb 2021 00:20 |
| Last Modified: | 27 Feb 2021 00:20 |
| URI: | http://repository.its.ac.id/id/eprint/82949 |
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