Peningkatan Kekuatan Aluminium 6061 Melalui Proses Artificial Aging pada Temperatur 150°C Dan 200°C dengan Variasi Waktu Aging untuk Aplikasi Pylon Kaki Palsu

Qibtiyah, Agustin Maryatul (2024) Peningkatan Kekuatan Aluminium 6061 Melalui Proses Artificial Aging pada Temperatur 150°C Dan 200°C dengan Variasi Waktu Aging untuk Aplikasi Pylon Kaki Palsu. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Berdasarkan data Survei Penduduk Antar Sensus (SUPAS) 2015 dari Badan Pusat Statistik (BPS), sekitar 8,56% penduduk Indonesia usia 10 tahun ke atas mengalami disabilitas. Dari persentase tersebut, 3,76% penduduk mengalami disabilitas berupa kesulitan berjalan atau naik tangga. Salah satu penyebabnya yaitu hilangnya anggota gerak bawah karena amputasi dan kaki prostetik menjadi solusi efektif. Namun, produksi kaki palsu di Indonesia masih terbatas, dan untuk meningkatkannya perlu dipertimbangkan pemilihan material dari salah satu bagian penting kaki palsu yaitu pylon. Aluminium, khususnya aluminium 6061, menjadi pilihan material yang harganya terjangkau, tetapi perlakuan panas diperlukan untuk meningkatkan kekuatannya. Metode age hardening atau precipitation hardening dapat digunakan untuk meningkatkan sifat mekanik aluminium 6061 untuk aplikasi pylon kaki palsu.
Penelitian ini bertujuan meningkatkan sifat mekanik aluminium 6061 untuk aplikasi pylon kaki palsu melalui perlakuan panas T6. Aluminium 6061 dipilih karena harganya terjangkau, meskipun membutuhkan perlakuan panas untuk meningkatkan kekuatannya. Perlakuan T6 melibatkan solid solution treatment pada 500°C selama 1 jam dengan pendinginan water quenching, diikuti artificial aging pada 150°C selama 8, 10, dan 12 jam, serta 200°C selama 1 hingga 6 jam. Hasil penelitian menunjukkan bahwa pada 150°C, nilai yield strength dan ultimate tensile strength tertinggi adalah 237,21 MPa dan 269,93 MPa, diperoleh pada aging 10 jam. Pada 200°C, nilai tertinggi adalah 232,40 MPa dan 254,18 MPa, diperoleh pada aging 4 jam. Hasil ini didukung oleh uji kekerasan. Meskipun peningkatan sifat mekanik lebih besar pada 150°C, nilai yang diperoleh belum memenuhi standar pylon kaki palsu, yaitu yield strength dan ultimate tensile strength masing-masing harus lebih dari 289 MPa dan 310 MPa. Salah satu penyebabnya yaitu setelah diuji komposisi kimia, kandungan unsur Mg pada paduan yang digunakan dalam penelitian di bawah range standar paduan aluminium 6061.
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Based on data from the 2015 Inter-Census Population Survey from the Central Bureau of Statistics, around 8.56% of the Indonesian population aged 10 years and over experience disabilities, including difficulty walking or climbing stairs. Of this percentage, 3.76% of the population experienced disability in the form of difficulty walking or climbing stairs. One of the causes is the loss of lower limbs due to amputation and prosthetic legs are an effective solution. However, the production of prosthetic legs in Indonesia is still limited, and to improve it, it is necessary to consider the material selection of one of the important parts of the prosthetic leg, namely the pylon. Aluminum, specifically aluminum 6061, is an affordable material choice in the local market, but heat treatment is required to increase its strength. Age hardening or precipitation hardening methods can be used to strengthen the mechanical properties of aluminum 6061 in prosthetic pylon applications.
This research aims to improve the mechanical properties of aluminum 6061 for prosthetic pylon applications through T6 heat treatment. Aluminum 6061 was chosen because it is affordable, although it requires heat treatment to increase its strength. The T6 treatment involves solid solution treatment at 500°C for 1 hour with water quenching, followed by artificial aging at 150°C for 8, 10, and 12 hours, and 200°C for 1 to 6 hours. The results showed that at 150°C, the highest yield strength and ultimate tensile strength values were 237.21 MPa and 269.93 MPa, obtained at 10 hours aging. At 200°C, the highest values were 232.40 MPa and 254.18 MPa, obtained at 4 hours aging. These results are supported by the hardness test. Although the improvement in mechanical properties was greater at 150°C, the values obtained did not meet the standard for prosthetic pylons, which are yield strength and ultimate tensile strength of more than 289 MPa and 310 MPa, respectively. One of the reasons is that after being tested for chemical composition, the Mg content of the alloy used in the study is below the standard range of 6061 aluminum alloy.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Aluminium 6061, Artificial aging, Yield Strength, Ultimate Tensile Strength Kekerasan, Aluminum 6061, Artificial aging, Yield Strength, Ultimate Tensile Strength, Hardness.
Subjects:	T Technology > TN Mining engineering. Metallurgy > TN687 Electric furnaces. T Technology > TN Mining engineering. Metallurgy > TN689+ Physical metallurgy T Technology > TN Mining engineering. Metallurgy > TN752.Q4 Metals--Quenching T Technology > TN Mining engineering. Metallurgy > TN775 Aluminum alloys--Metallurgy. T Technology > TS Manufactures > TS205 Metals--Heat treatment.
Divisions:	Faculty of Industrial Technology > Mechanical Engineering > 21201-(S1) Undergraduate Thesis
Depositing User:	Agustin Maryatul Qibtiyah
Date Deposited:	09 Aug 2024 07:33
Last Modified:	25 Sep 2024 02:50
URI:	http://repository.its.ac.id/id/eprint/113854

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