Analisis Pengaruh Variasi Media Pendingin Dan Holding Time Artificial Aging Paduan Cu-14,6Zn-7,41Al Terhadap Struktur Mikro, Kekerasan Dan Shape Memory Effect

Putra, Fernanda Fadhlurrahmanditio Dwi (2022) Analisis Pengaruh Variasi Media Pendingin Dan Holding Time Artificial Aging Paduan Cu-14,6Zn-7,41Al Terhadap Struktur Mikro, Kekerasan Dan Shape Memory Effect. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Shape Memory Alloy (SMA) adalah suatu logam paduan yang dapat kembali ke bentuk awalnya setelah dilakukannya deformasi Hal ini dikarenakan shape memory alloy memiliki sifat shape memory effect. Pada penelitian ini, paduan yang digunakan adalah Cu-Zn-Al dengan perlakuan panas yang diberikan homogenizing, annealing, solution treatment, dan artificial aging.Terdapat dua variasi media pendingin yang digunakan yaitu brine serta oli dan variasi holding time pada proses artificial aging yaitu 1 jam, 3 jam, dan 5 jam. Kekerasan hasil solution treatment menggunakan media pendingin oli memiliki nilai kekerasan yang lebih besar dibandingkan media pendingin brine dengan nilai sebesar 201 ± 1,22 VHN. Kekerasan hasil artificial aging meningkat dari variasi holding time 1 jam hingga 5 jam, dengan nilai kekerasan tertinggi adalah pada variasi holding time 5 jam menggunakan media pendingin brine sebesar 303,4 ± 1,82 VHN.Didapatkan bahwa semakin lamanya holding time pada proses artificial aging akan membuat semakin banyak presipitat yang menutupi fasa β’ akan membuat area fasa β’ (twinned martensite).Nilai recovery shape memory effect terbesar didapatkan pada spesimen BR850 dengan nilai sebesar 90% =================================================================================================== Shape Memory Alloy (SMA) is a metal alloy that can return to its initial shape after deformation. This is because shape memory alloys have shape memory effect properties. In this study, the alloy used was Cu-Zn-Al with heat treatment given by homogenizing, annealing, solution treatment, and artificial aging. There are two variations of the cooling media used, namely brine and oil and variations in holding time in the artificial aging process, namely 1 hour, 3 hours, and 5 hours. The hardness of solution treatment using oil cooling media has a greater hardness value than brine cooling media with a value of 201 ± 1.22 VHN. The hardness of the artificial aging results increased from a holding time variation of 1 hour to 5 hours, with the highest hardness value being a holding time variation of 5 hours using brine cooling media of 303.4 ± 1.82 VHN. It was found that the longer the holding time in the artificial aging process, the more precipitates that cover the β' phase will create the β' phase area (twinned martensite). The largest shape memory effect recovery value was found in the BR850 specimen with a value of 90%.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: Artificial Aging, Kekerasan, Hardness, Media Pendingin, Cooling Media, Shape Memory Alloy, Shape Memory Effect, Mikrostruktur, Microstructure
Subjects: T Technology > TS Manufactures > TS205 Metals--Heat treatment.
T Technology > TS Manufactures > TS253 Die-Casting
Divisions: Faculty of Industrial Technology and Systems Engineering (INDSYS) > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis
Depositing User: Fernanda Fadhlurrahmanditio Dwi Putra
Date Deposited: 06 Feb 2022 09:18
Last Modified: 06 Feb 2022 09:18
URI: https://repository.its.ac.id/id/eprint/92847

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