Analisis Kemampuan Pendeteksian Pengujian Eddy Current Terhadap Retak Memanjang Logam Las Pada Sambungan Tee Joint Material Aluminium 5083 Dilapisi Non-Conductive Coating Dengan Variasi Panjang Dan Kedalaman Cacat

Andrian, Henry Haidar Jati (2021) Analisis Kemampuan Pendeteksian Pengujian Eddy Current Terhadap Retak Memanjang Logam Las Pada Sambungan Tee Joint Material Aluminium 5083 Dilapisi Non-Conductive Coating Dengan Variasi Panjang Dan Kedalaman Cacat. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Material seringkali mengalami kerusakan atau retak yang diakibatkan oleh proses pengelasan, salah satunya berada di bawah lapisan pelindung material. Retak tersebut dapat diperiksa dengan metode Eddy Current Testing. Penelitian ini bertujuan untuk menganalisis sensitivitas dari Eddy Current Testing (ECT) dengan menggunakan variasi dimensi retak pada sambungan las tee joint material aluminium 5083. Penelitian ini menggunakan lima buah test piece material aluminium 5083 dengan masing-masing material berkuran 200 mm x 50 mm x 10 mm. Tiap material tersebut disambungkan dengan cara dilas. Retak buatan dibuat dengan menggunakan Electrical Discharge Machining (EDM) dengan variasi panjang dan kedalaman retak dengan 4 retak tiap test piece. Variasi panjang retak yang digunakan yaitu: 5.0 mm, 7.0 mm, 9.0 mm, dan 15.0 mm. Untuk variasi kedalaman retak yang digunakan yaitu: 0.5 mm, 1.0 mm, 1.5 mm, 2.0 mm dan 2.5 mm. Dengan menggunakan pengaturan parameter pengujian sebagai berikut. Probe connector: BNC; Frequency mode: Single; Frequency: 30 kHz; Angle: 352o; H gain: 59.8 dB; V gain: 68.9 dB; didapatkan hasil tinggi rata-rata indikasi sinyal retak pada pendeteksian kedalaman retak sebagai berikut. Untuk kedalaman retak 0.5 mm tinggi indikasi sinyal retaknya 4.5 mm; kedalaman 1.0 mm adalah 11.75 mm; kedalaman 1.5 mm adalah 19.75 mm; kedalaman 2.0 mm adalah 26.5 mm dan kedalaman 2.5 mm adalah 31.25 mm. Tingkat ketelitian yang didapat untuk pendeteksian kedalaman retak ialah 93.57%. Untuk pendeteksian panjang retak didapatkan hasil rata-rata panjang terukur retak buatan sebagai berikut: panjang retak aktual 5 mm memiliki nilai panjang retak terukur 6.32 mm; panjang retak aktual 7 mm memiliki nilai panjang retak terukur 7.18 mm; panjang retak aktual 9 mm memiliki nilai panjang retak terukur 8.8 mm dan panjang retak aktual 15 mm memiliki nilai panjang retak terukur 14.48 mm. Tingkat ketelitian yang didapat untuk pendeteksian panjang retak ialah 91.31%. ==================================================================================================================== Materials often experience damage or cracks caused by the welding process, one of which is under the protective layer of the material. These cracks can be checked using the Eddy Current Testing method. This study aims to analyze the sensitivity of the Eddy Current Testing (ECT) by using a variety of crack dimensions at the 5083 aluminum material tee joint. This study uses five 5083 aluminum test pieces with each material measuring 200 mm x 50 mm x 10. mm. Each of these materials is welded together. Artificial cracks were made using Electrical Discharge Machining (EDM) with variations in the length and depth of cracks with 4 cracks per test piece. Variations in the length of the cracks used were: 5.0 mm, 7.0 mm, 9.0 mm, and 15.0 mm. For variations in the depth of cracks used, were: 0.5 mm, 1.0 mm, 1.5 mm, 2.0 mm and 2.5 mm. By using the following test parameter settings. Probe connector: BNC; Frequency mode: Single; Frequency: 30 kHz; Angle: 352o; H gain: 59.8 dB; V gain: 68.9 dB; The results obtained by the height and average length of the crack signal indication in this study are as follows. For a crack depth of 0.5 mm, the height of the crack signal is 4.5 mm; depth of 1.0 mm is 11.75 mm; depth of 1.5 mm is 19.75 mm; depth of 2.0 mm is 26.5 mm and depth of 2.5 mm is 31.25 mm. The level of accuracy obtained for the detection of crack depth was 93.57%. For the detection of crack length, it was found that the measured mean length of artificial cracks was as follows: the actual crack length of 5 mm had a measured crack length of 6.32 mm; actual crack length of 7 mm has a measured crack length value of 7.18 mm; The actual crack length of 9 mm has a measured crack length value of 8.8 mm and the actual crack length of 15 mm has a measured crack length value of 14.48 mm. The level of accuracy obtained for the detection of crack length was 91.31%

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: Aluminium 5083, Eddy Current Testing, Retak, Tee-joint Aluminium 5083, Crack, Eddy Current Testing, Tee-joint
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM156 Naval architecture
Divisions: Faculty of Marine Technology (MARTECH) > Naval Architecture and Shipbuilding Engineering > 36202-(S1) Undergraduate Thesis
Depositing User: Henry Haidar Jati Andrian
Date Deposited: 10 Mar 2021 03:19
Last Modified: 10 Mar 2021 03:19
URI: https://repository.its.ac.id/id/eprint/84016

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