Alvaro, Muhammad (2023) Analisis Pengaruh Variasi Holding Time Artificial Aging Dan Media Pendingin Pada Paduan Cu-12,1Al-1,89Mn Terhadap Struktur Mikro, Kekerasan Dan Shape Memory Effect. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Shape memory alloy adalah suatu logam paduan yang dapat kembali ke bentuk awalnya setelah dilakukannya deformasi. Hal ini dikarenakan shape memory alloy memiliki sifat shape memory effect. Cu-based shape memory alloy memiliki kelebihan dari sisi harga yang relatif murah dan prosedur fabrikasi yang sederhana. Pada penelitian ini, paduan yang digunakan adalah Cu-12,1Al-1,89Mn dengan perlakuan panas yang diberikan yaitu homogenizing, annealing, solution treatment, dan artificial aging. Terdapat dua variasi media pendingin yang digunakan yaitu brine dan air serta variasi holding time pada proses artificial aging yaitu 30 menit, 60 menit, dan 90 menit. Pengujian yang dilakukan untuk menganalisis pengaruh variabel diatas adalah pengujian komposisi, pengujian X-Ray Diffraction (XRD), pengujian metalografi, pengujian Differential Scanning Calorimetry (DSC), pengujian kekerasan, dan pengujian shape memory effect. Hasil pengujian XRD menunjukkan fasa β-Cu3Al yang terbentuk dalam paduan dan pengujian metalografi menunjukkan adanya struktur β’-Cu3Al twinned martensite yang mempengaruhi sifat shape memory paduan. Media pendingin aquades dan brine pada proses solution treatment memiliki pengaruh yang tidak signifikan terhadap hasil struktur mikro, kekerasan dan shape memory effect paduan. Nilai kekerasan setelah solution treatment lebih besar pada spesimen AQ850 yaitu 282 HV dan shape memory effect yang lebih besar pada BR850 yaitu 65%. Namun perlakuan artificial aging pada temperatur 200⁰C selama 90 menit dapat merubah struktur mikro paduan yang mengakibatkan reverse martensite transformation sehingga terjadi penunuran sifat shape memory hingga 50% dan kenaikan nilai kekerasan hingga 312 HV
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Shape memory alloy is an alloy that can return to its original shape after deformation. This is because the shape memory alloy has a shape memory effect. Cu-based shape memory alloy has the advantages of relatively cheap price and simple fabrication procedure. In this study, the alloy used was Cu-12,1Al-1,89Mn with the heat treatment given, namely homogenizing, annealing, solution treatment, and artificial aging. There are two variations of cooling media used, namely brine and water as well as variations in holding time in the artificial aging process, namely 30 minutes, 60 minutes and 90 minutes. Tests carried out to analyze the effect of the variables above are composition testing, X-Ray Diffraction (XRD) testing, metallographic testing, Differential Scanning Calorimetry (DSC) testing, hardness testing, and shape memory effect testing. The results of the XRD test showed that the β-Cu3Al phase formed in the alloy and metallographic testing showed the presence of a β'-Cu3Al twinned martensite structure which affected the shape memory properties of the alloy. Aquades and brine cooling media in the solution treatment process had no significant effect on the results of the microstructure, hardness and shape memory effect of the alloy. The hardness value after solution treatment was greater for the AQ850 specimen, which was 282 HV, and the shape memory effect was greater for the BR850, which was 65%. However, artificial aging treatment at 200⁰C for 90 minutes can change the microstructure of the alloy resulting in reverse martensite transformation resulting in a decrease in the shape memory properties of up to 50% and an increase in the hardness value up to 312 HV
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Shape Memory Alloy, Paduan Cu-Al-Mn, Media Pendingin, Artificial Aging, Shape Memory Effect, Shape Memory Alloy, Cu-Al-Mn Alloys, Quenchant Media, Artificial Aging, Shape Memory Effect |
| Subjects: | 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: | Muhammad Alvaro |
| Date Deposited: | 13 Feb 2023 04:17 |
| Last Modified: | 13 Feb 2023 04:17 |
| URI: | http://repository.its.ac.id/id/eprint/96471 |
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