Pengaruh Variasi Media Pendingin pada Proses Heat Treatment Cu-21,8Zn-7Al Shape Memory Alloy terhadap Efek Shape Memory dan Struktur Mikro

Devara, Garias (2019) Pengaruh Variasi Media Pendingin pada Proses Heat Treatment Cu-21,8Zn-7Al Shape Memory Alloy terhadap Efek Shape Memory dan Struktur Mikro. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Paduan shape memory (Shape Memory Alloy) merupakan paduan yang memiliki kemampuan untuk mengingat bentuknya pada temperatur tertentu. Paduan Cu-Zn-Al memiliki efek shape memory pada rentang komposisi tertentu. Paduan shape memory Cu-Zn-Al biasa diaplikasikan sebagai sensor panas pada saat terjadinya kebakaran untuk mematikan gas-gas yang mudah terbakar. Penelitian ini dilakukan untuk mengetahui pengaruh variasi media pendingin pada proses heat treatment Cu-21,8Zn-7Al shape memory alloy terhadap efek shape memory dan struktur mikro. Variasi media pendingin yang digunakan adalah brine, air, oli, dan udara. Sebelum proses heat treatment, tembaga, kuningan, dan aluminium dilebur dengan electric furnace kemudian dituang ke dalam cetakan permanen yang terbuat dari ductile cast iron. Selanjutnya dilakukan pengujian XRF, XRD, Metalografi, DSC, kekerasan, dan uji efek shape memory. Dari hasil pengujian didapatkan bahwa semakin kuat media meningkatkan efek shape memory dan pertumbuhan martensit pada struktur mikro. Hasil dengan shape memory recovery tertinggi sebesar 90% dan martensit yang paling besar diperoleh pada media pendingin brine.
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Shape memory alloys (SMAs) are a group of alloys that exhibit shape recovery at a certain temperature. Cu-Zn-Al exhibit shape memory properties on a certain range of composition. Cu-Zn-Al SMAs often used as fire safety valve which designed to shut off flammable and toxic gases. The focus of this study is to investigate the effect of quenching media variations in the heat treatment process of Cu-21,8Zn-7Al on shape memory effect and microstructure. Brine, water, oil, and air were used as the cooling media. Before the heat treatment process, copper, brass, and aluminium were melted using electric furnace, then casted into ductile cast iron mold. XRF, XRD, Metallography, DSC, Hardness, Shape Memory Effect tests has been done. The results suggested that the strength of the cooling media affects shape memory recovery and growth of martensite phase in microstructure. Highest shape memory recovery of 90% and biggest size of martensite were acquired from the quenching result of brine solution.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Paduan shape memory, Cu-Zn-Al, pengecoran, heat treatment, struktur mikro
Subjects:	T Technology > T Technology (General) T Technology > TN Mining engineering. Metallurgy > TN690 Metallography. Physical metallurgy T Technology > TS Manufactures T Technology > TS Manufactures > TS170 New products. Product Development
Divisions:	Faculty of Industrial Technology > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis
Depositing User:	Garias Devara
Date Deposited:	22 Jul 2026 06:01
Last Modified:	22 Jul 2026 06:01
URI:	http://repository.its.ac.id/id/eprint/65000

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